My Service and Procedure Book- www.acservicetech.com/the-book Support The Channel- www.patreon.com/acservicetech Tool List- www.amazon.com/shop/acservicetech For those that are looking for the tools used in the videos: (Linked Below) UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ Valve Core Removal Tool amzn.to/2uYr8WL Blue Vapor Yellow Jacket Gauge- amzn.to/2Ju7pan Red Liquid Yellow Jacket Gauge- amzn.to/2sSFmGH Quick Coupler for the Gauges- amzn.to/2sTk8Ze JB Test Gauge High Side- amzn.to/2ruQb0l JB Test Gauge Low Side- amzn.to/2qR0utM Manual Copper Tube Swage/Expander- amzn.to/2WRPa1M Uniweld Hydraulic Swaging Tool- amzn.to/2MlrI8m Uniweld Swage and Flare Kit- amzn.to/2T55jyn Ameriflame Oxy Acetylene Torch Setup- amzn.to/2SRm3JF #2 Tip for Oxy Acetylene Torch- amzn.to/2SPDaeD Cap-N-Hook Tip for Oxy Acetylene- amzn.to/2MbhpUk Air Acetylene Torch Setup- amzn.to/2aQalsb 15% Silver Brazing Rods- amzn.to/2gVLyLc Nitrogen Regulator- amzn.to/2bXdR5f Nitrogen Flow Meter- amzn.to/2brvoBg NitroVue Flow Reg- amzn.to/2MiulYv Ultrasonic Leak Detector- amzn.to/2Lw4Zpr UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ Magnet Jumpers- amzn.to/2PyKPQZ Alligator Jumpers- amzn.to/2PxqJXn Fieldpiece ST4 Dual Temp Meter amzn.to/2wc1ME3 Fieldpiece Bead K Type Temp Sensor amzn.to/2DBwKfs Fieldpiece Wet Bulb Temp Sensor amzn.to/2RRI7Tw Fieldpiece TC24 Temp Clamp amzn.to/2qHLyjZ Yellow Jacket Refrigerant Gauge Set amzn.to/2aenwTq Refrigerant hoses with valves amzn.to/2aBumVI Yellow Jacket Gauge set & hoses amzn.to/2vLVkV9 Yellow Jacket 4 Port Manifold w Hoses amzn.to/2BkuGIq FieldpieceSMAN360 Digital Manifold Set amzn.to/2BdoaD4 FieldpieceSMAN460 Digital Manifold Set amzn.to/2nB4Fe6 Compact Ball Valve for Refrigerant Hose amzn.to/2KUisW8 QuickDisconnect 90 for refrigerant hose amzn.to/2MMtVcg JB 6 CFM Vacuum Pump amzn.to/2nqbvo8 Appion Blue 3/8" to 1/4" Vacuum Hose amzn.to/2uYlVyc Appion Red 3/8" to 1/4" Vacuum Hose amzn.to/2uYg6Ro Appion Valve Core Removal Tool amzn.to/2uYr8WL Yellow Jacket 1/4" by 1/4" hose amzn.to/2umtcod CPS Vacuum Micron Gauge amzn.to/2v1nM3O Supco Vacuum Micron Gauge amzn.to/2v1JRiA RectorSeal Bubble Gas Leak Detector amzn.to/2ckWACn UEI DL389 Multimeter amzn.to/2xAdaJf Other tool links can be found in the video description section. Shop through Amazon! Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from all purchases after clicking through. Prices are the same as normal- www.amazon.com/shop/acservicetech
Bravo sir....if you’d had done this presentation 18 months ago when I started at the job I have now, I wouldn’t have had to hunt down thermostat diagrams and electrical theory to understand it on my terms how these thermostats work. This should cut out the guesswork of most guys who don’t have 30 years into the electrical field as I have and make installs or the wiring needs easier to apply in their situations...
This video was THE clear and detailed description I have been looking for. Specifically, you mention Ruud and Ream heat pumps with their B wire @6:37 which is my system. Thank you so much!
Confused about the connection between the W terminals on heat pump and air handler, and the E/aux terminals on the thermostat. The W on the heat pump is an output (as you say), but the E/aux on the thermostat is also an output. So those two outputs are connected together, so doesn't that cause an electrical conflict (sort of like a short-circuit) ?
Hey man you help me out so much in the field, and I just wanted to thank you for that. I started my HVAC company 2 years ago quit my high paying maintenance mechanic job and it’s been a roller coaster ride ever since but everything is going very well. Keep up the good work with your channel!
I've been looking at several videos on heat pump thermostat wiring as well as talking to a Honeywell tech who gave me wrong instructions. This video finally gave me the correct wiring setup for my Goodman heat pump and a new Honeywell stat with AUX heat. I had a black wire that the Honeywell tech told me to connect to "E"emergency and white to AUX. I asked about jumping the "E" and AUX and he said no. I got no heat in "E" mode so I removed the black wire and jumped the "E" and AUX and everything works. The black as well as a brown wire are "extra" if needed. This video was the only one that said the black and brown were extra. Great Video!
Outstanding!!! I've been trying to figure out the wiring on my new Honeywell thermostat. This is the FIRST comprehensive explanation I've seen to date.
Hi question, I'm switching from a Trane thermostat to a Honeywell T2 Non Programmable Thermostat on our Trane split system Heat Pump with Emergency Heat strips (I Think). The Trane has a Blue , Orange, Green, yellow, red, and a white wire coming out of the wall, There is also a cross over W1 (White wire) on the Trane going from W1 to W2/X2 on the Trane thermostat Our . The Honey Well has a place for a O/B wire. Does the Orange wire from the Trane go in the O/B slot on the Honeywell or the Blue wire?, and does the Blue wire from the Trane go in the C slot on the Honeywell?
Question I’m trying to figure out a control circuit for a heat pump so I can feed the unit from the tenant panel for Air condition and from the house panel for heat,I want to install some rely to interlocking fro each other,do you have any idea of the best way to do it? Thanks Franklin
Boy, my head is spinning from this power-packed information! I watched twice and really have a great grasp on how my HVAC system was incorrectly installed. Thanks so much! Subscribed!
This is great. Thanks for explaining. I've had multiple HVAC guys out to try to diagnose our heat pump/ electric grid system. Each time, after they left and I paid the bill, the system was worse than before they came. Since no one around here seems to be competent, I had to learn it myself. The last time they came, they hooked the white wire to W in the thermostat rather than to AUX/E. Only the heat pump would run, and we didn't get any backup electric heat. I fixed that issue and now both the heat pump and electric heat work! I still have one issue going on. When the outdoor heat pump turns on, the compressor cycles repeatedly every 15-20 seconds. Also, the large air fan on the heat pump doesn't turn on. It was turning on recently, but between all the guys that have messed with it, it has stopped working. I just wonder if there is anything in the wiring that could be causing this? If I am understanding correctly, the heat pump compressor and fan are both triggered by the same wire? By the way, the first guy who came out checked the refrigerant pressures, looked for leaks, and said everything was fine, but added a little bit of refrigerant. I don't think the refrigerant is low.
Great video quick question i have a 3 wire oil furnace if i touch white and blue wire together heat comes on otherwise if i put blue into c it does not work what im i doing wrong
I don't think it matters a lot but it seems to me rheem and ruud are the ones who are doing cooling and heating in relation to reversing valve in the right way and other HVAC manufacturers are running it in the opposite way lol. Thanks for your continuous sharing of knowledge!
I think of it in the opposite way because I live in a cold climate. If the coil on the reversing valve is bad, it will still operate in heating mode which would be more of a necessity but it really depends on the location in which you live as far as what a necessity is, thanks!
Hi, I don't understand how come some systems only connected Y from thermostat to outdoor Y but not connected to the air handler. Can you explain that to me?
I think ya did a fine job of explaining the 6 wire layout. Thanks that’s what I needed. (I’m dealing with an old ass coleman heatpump [1979-80?]) As you know an electrician is useless as an AC guy. You might have just changed that. 🤣😂 Really tho… thanks man.
Now where's the video explaining something like a train or American Standard Platinum 1050 communicating thermostat (because you have zones) that only has BRD and you have to have Tranes relay panel because your air handler (that is variable speed) and heat pump (which is 2 stage by the way) so all your connections are made within the relay panel because thermostat only has three inputs and only uses the 2 AUX inputs for ventilators and dehumidifiers/humidifiers and has 2 ODS inputs for an outdoor thermostat and nothing else. The relay panel has all the thermostat inputs Which is BRD Y1 Y2 C R D BLK BR BK B/WHT O W1 W2 W3 and finally E.
Where abouts is the sensor connected, and what sort of sensor are these typically? I have a project to replace this and simulate with my own sensor - is this practical? thanks Heatpump is a generic Fujitsu
This video helped me resolve 5 years of Hell. NO WONDER my AC never ran correctly. The custom home I bought (second owner) has a heat pump with two zones and a zone controller. But only 5 wires pulled to the thermostats. This video makes it clear I need a 6th wire for the reversing valve. I followed the instructions with a makeshift 6th wire and my AC works perfectly. Thanks again for making sense out of this for me.
Craig, or anyone here. I have a honeywell t9 thermostat. I'm pretty sure I wired it correct. One problem is when in cooling mode, then pressing circulate the AC condenser runs. In heat mode, then pressing circulate, just the blower runs. Any ideas or just contact Honeywell? It does cool and heat normally when in normal mode.
I have a xe 1200 trane, and t8411 1101 thermostat , both o and b are used, o - orange , b - black, trying to change to honywell rth6580wf. don't I need both o and b ?
From my heat pump, the tech installed - Orange, Blue, Red and black going to the control board at the furnace. But I’m not sure where they would go to. On the control board it shows - W , C, R, G, and Y
Hi, I just installed a MrCool 36K Hyper heat ducted system , it works fine with the thermostat that came with the unit. But I would like to use my Google Nest gen3 thermostat instead. If you or anyone, can help me with how to wire the Nest that would be great. Thank you very much. Noel.
Yeah that's if the installer before you using the standard color codes. I know a building that used blue for O/B and Orange for common and other colors off matched. Sometimes you just have to verify what colors are hooked up to the control boards.
You always need to look at the indoor unit when replacing a thermostat and look at what terminals the old tstat was connnected to. This was more for when you are installing it and running the wires, thanks KCTech!
My heat pump would not come on only the electric elements in the air handler. I tested voltage at the unit and all was fine. If I jumper the Yellow and white at the control board on the outside unit the heat pump comes on and works. The Ac will not cool with it jumpered. I am in Florida so don't use the heat much and just did the jumper trick for last winter. This year I ordered a brand new control board thinking that was the problem. Heat pump will still only work if I put a jumper in on those 2 wires. Any Idea what else to check? Otherwise, I will just keep doing the jumper as we only have +- 12 days year to run heat anyhow just a bit of a hassle to have to remove the cover and put the jumper in and out.
Hey I currently have a oil fired furnace and I installed a Goodman 5-ton with a heat pump do I need a relay to be able to have the heat pump or the furnace I know you said that the heat pump will be emergency
I understand the wiring. How would i wire the heat pump system with a gas furnace? Me being a Pa resident we don't have air handlers The O is geting me confused since the board on the furnace don't have o
Our royalty Bin Rashid daughter mah_alkatoum sheikhamah sweety you hate me iam so so sick you mahalkhoutum you travel with your lover you enjoy life iam living with sad so sad more years i try to made love friendship but you have better lufe with your loves man so wish you al the best ever best luck always to you and better life from so iam wate guy from colombo work saudi tou known as last several years
I am building a small concrete house. i think what i am wanting is a water to water heating and cooling system. i will plumb the floor and the walls. there will be no air or ducting or fan. will i be able to set my temperature to 74 year round ? thank you for being here.
Humm my old thermostat had a blue wire on the c terminal & it looks like now my blue wire should go to the b terminal on my new thermostat. 🤔 Well here goes nothing
Thanks. My outside heat pump(Rheem 13PJL30A01) unit won't turn on at AC mode. Traced inside and outside, everything seems fine except the outside contactor coil does not receive the 24V for start from the DFC control board.. On the control board(DFC), inlet wires from the house on lead R and C has 24V, but the out leads (Y and CC) that go out to the contactor coil has no voltage. Can I fix the control board DFC? or have to replace the DFC? Many thanks.
Thank you so much. I needed to bypass my cdef board. I think the contactor relay is fried. Bought a cheep Amazon board DOA no lights when connected and CB turned on. FRUSTRATING. You get what you pay for. I normally do Aircraft and Automotive AC. This was exactly what I needed to get my house cooled off while I find the right board. I did wire in my pressure sensors. They work fine, good 410A refrigerant pressures. Just a bad board. Hvac co estimated $1,101.68 to replace the 100 board with less than 20 push on or screw on connections... Give me a break. I said 1/2. No way we will starve. Never mind I will fix it myself!!!! Thanks yo you its working perfectly and safe in cool mode until I can get the board.
Please help, as my HVAC contractor has been unable to address the issues so far. Below are the units which have been purchased and installed in my residence. The installers have spent days re-wiring my Nest thermostats and they still appear to not function properly. Can you provide assistance? Can you provide a definite answer that 3rd Generation Nest should/will work with the below devices? If not, why not and which SMART thermostats will work? I have seen my neighbors with brand new and modern Carrier and Goodman systems which do not have any issues with Nest Gen3. AVZC200481 4 TON AMANA HP - INV. AVPEC61D14 AMANA AHU Thank you,
Best, just best explanation on You tube I’ve ever seen! I've little bit been confused about Aux and Electric terminal on heat pumps. California. Now the wiring combinations is clear to me. BIG thank you, Craig. Interesting, so electric strips helping to achieve set temperature faster. Also, I've met a gas furnace on Aux in Seattle. Coool!
Hey Tapch MC, glad to help and thank you for your support on Patreon.com/acservicetech - Yeah so aux is powered when the thermostat notices that the heat pump cannot keep up on its own or the temp is set up to far compared to the actual temp in the building. The electric strip heating is downstream of the coil so it won't effect the coil's heat rejection and will add to it to get the air hotter, thanks and look at some of the other videos I linked in the 18 thermostat video playlist in the description. There are others that describe the aux too, thanks!
I’m trying to replace the thermostat for a friend with heat pump, but he has a sensor with 2 S wires wired into his old Honeywell thermostat. Don’t I need to be able to wire those? My heat pump had a sensor connection, too. Nothing about the sensor here.
I have a Goodmans Heat pump AC Air Handler and Condenser and a Nest Thermostat installed in 2014. Yesterday the Nest showed no power. After an extensive test with Nest online chat it was concluded thermostat is OK and fault is probably with Circuit board in air handler. Sure enough I found the fuse had blown on the board (PCBFM103). I replaced the fuse, fired up and the fuse blew again. I have ordered a new board (now PCBFM103). This got me looking at the wiring. There are only 4 wires going to the condenser connected to Contactor/C, R, Y, and O on the condenser and one of them is connected by alligator clips to one side of a resistor on the PCBFM103 circuit board. None of this makes sense looking at your wiring diagram. Any ideas for resolving this puzzle would be most welcome. Thanks.
Great video Craig! I was referencing this the other day installing a hybrid dual fuel system just like the setup in your video. My question is if the heat pump terminal strip has a "D" Defrost terminal which is energized with 24v when the heat pump goes into defrost mode can I run a wire from the heatpump "D" terminal to W2 on the furnace terminal strip so the furnace comes on while the indoor coil is getting cold in Defrost mode? The defrost is controlled by the heat pumps Board or one of its boards.
Hello. First, awesome video. I finished wiring new heat pump and elec furnacea, everything works A1 thanks to your videos. I only got one question, hope you can help: at the end of swapping old system with a newer one ( bought second hand) i still have a temp sensor left. It was hooked om the indoor coil, but i have no idea were it should be pluged. Both wires are red and i have no indications. Tried to found the answer elsewhere but non succes. So what does this sensor do and where it should be plug ? Thank you.
Ok figured out the problem. The PCB had been rigged to bypass a soldering fault in the G connector plus something had gone low causing the fuse to blow. The PCB should have been replaced at initial installation. Shoddy work. New PCB cost hardly anything and all is up working fine thanks to your TH-cam and Nest (great customer service). I now understand all (well almost all) of the electrical side of my HVAC Thanks again.
Very helpful but still confused for my heat pump thermostat. There is no C. I have a W, Y, R, G and B (Rheem) that I understand. Then also black wire to E and brown wire to X. One must be auxillary heat, the other? Hoping to wire a smart thermostat.
I have a question, I have a non fused disconnect, but my ac went out so i am doing away with it and instaling a window ac/heat, it runs off 220 just like my ac does, so can i swap out the non fused cut off box for a 125 amp sub panel with a 220 breaker for my new ac window unit?
I have a Fujitsu mini split, I use a adapter (UTY-TTRX) to connect to nest. On the adapter it doesn’t have O/B input to connect to. On the nest it show the wire are connected. When I call for heat it light up orange, but the air handler doesn’t not power on. Thanks
What would happen if the G wasn't hooked up - doesn't the Heat pump see the call for R+Y and know to turn the fan on using the internal furnace board logic? Is it really necessary for the thermostat to call for G in parallel? I was under the impression the G+R call is specifically when you want airflow without heating/cooling.
I had to watch this twice to get it but I'm not qualified as an a/c guy. After the 2nd time, I realized the function at the thermostat changed the voltage command the respective part or parts to run Air , cold air, reversal to heat, resistance heat, and emergency heat. At least it helps understand also what is not happening when your trying to get heat or cold air. I'm gonna take a class if I get a chance .
on heat call with auxillary heat on, there's 24 volts on R,Y,G, W/aux right?..if you are using high speed on cool and low speed on heat , how do you not sending power to both speeds of the blower fan if G and W are both energized?.....been looking for a diagram/explanation for a lil while now, could not find one....thanks in advance!
I was working on a heat pump package unit and programming the new customer supplied thermostat and no e terminal was present but when put into emergency heat the heat strips would turn on and compressor would not turn on my question is if the Y and O terminal are not powered with W and just W is powered does that activate the heat strip as well because the thermostat knows no E terminal is present?
I have a question . I am going to replace my old thermostat that has only 4 wires connected R, G,W and Y. The B is not connected. My new thermostat has batteries, but the panel doesn’t have a letter W, do I connect the W wire to E?
Why would the thermostat send power to the fan relay in aux heat? I thought the fan was turned on by the sequencer with electric strip heat, and then through the fan relay's NC contacts? If you send power through g in aux heat you would have the fan running in high speed and subsequently reducing the heating efficiency the heat pump is producing.
Actually you spoke at my speed and I’m tired at 11pm. Wrapping up a heat pump installation and I’m sucking up this information as I get confused 😐 Thank you!
I am going to be buying a new house. I wanted to possibly get a nest or another smart thermostat in place of the old thermostat. The unit at this home is an older Lennox model from 1995. Its a 2.5 ton unit. I dont know the exact model number, but I will find out soon. It is a heat pump, and also has an emergency heat stage with heating elements. Will these newer smart thermostats work for something like this? Any recommendations or advice on this?
about the wiring, I have an older Honeywell thermostat & I was told that where I have a white wire going to the "W2" that on the newer Honeywell connect it to the "E" slot. I have a heat pump with emergency heat. Is that correct?
Hello Sir, Is it possible to add reverse valve in the inverter ac's. The ac is of R32 gas and 2.2 ton mitsubishi electric GR series. If possible then what are the changes
Is 28V too high? Also, is any measured voltage between 24 and 0 on any wires (yellow in my case) indicative of a problem? I am getting 6.7V on the yellow wire at the condenser unit with the thermostat in cooling mode but setpoint above the room temperature (so that cooling is not called on).
So is it normal that when I went to install my nest, there were two wires (black and brown) that were unconnected to anything inside the wall? Also my thermostat had the white wire hooked up to the W2/aux terminal instead of the W1.
I followed the wire it seems to be wire nut attached to the white W2 wire at the air handler and in the same wire nut is another black wire going out to the outdoor unit. I think it’s for emergency heat.
thank you for 2 days I have been trying to figure out why my heat strips were connected to the outdoor unit and had the misconception that the W terminal from the thermostat was the heat command . your explanation provided complete understanding of how it actually works
![[Live] ศึกมหึมันส์มวยไทยสังเวียนเดือด เวทีมวยชั่วคราวสวนสยาม | จันทร์ 30 กันยายน 2567](http://i.ytimg.com/vi/pM1k6f7JXUc/mqdefault.jpg)
My Service and Procedure Book- www.acservicetech.com/the-book
Support The Channel- www.patreon.com/acservicetech
Tool List- www.amazon.com/shop/acservicetech
For those that are looking for the tools used in the videos: (Linked Below)
UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ
Valve Core Removal Tool amzn.to/2uYr8WL
Blue Vapor Yellow Jacket Gauge- amzn.to/2Ju7pan
Red Liquid Yellow Jacket Gauge- amzn.to/2sSFmGH
Quick Coupler for the Gauges- amzn.to/2sTk8Ze
JB Test Gauge High Side- amzn.to/2ruQb0l
JB Test Gauge Low Side- amzn.to/2qR0utM
Manual Copper Tube Swage/Expander- amzn.to/2WRPa1M
Uniweld Hydraulic Swaging Tool- amzn.to/2MlrI8m
Uniweld Swage and Flare Kit- amzn.to/2T55jyn
Ameriflame Oxy Acetylene Torch Setup- amzn.to/2SRm3JF
#2 Tip for Oxy Acetylene Torch- amzn.to/2SPDaeD
Cap-N-Hook Tip for Oxy Acetylene- amzn.to/2MbhpUk
Air Acetylene Torch Setup- amzn.to/2aQalsb
15% Silver Brazing Rods- amzn.to/2gVLyLc
Nitrogen Regulator- amzn.to/2bXdR5f
Nitrogen Flow Meter- amzn.to/2brvoBg
NitroVue Flow Reg- amzn.to/2MiulYv
Ultrasonic Leak Detector- amzn.to/2Lw4Zpr
UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ
Magnet Jumpers- amzn.to/2PyKPQZ
Alligator Jumpers- amzn.to/2PxqJXn
Fieldpiece ST4 Dual Temp Meter amzn.to/2wc1ME3
Fieldpiece Bead K Type Temp Sensor amzn.to/2DBwKfs
Fieldpiece Wet Bulb Temp Sensor amzn.to/2RRI7Tw
Fieldpiece TC24 Temp Clamp amzn.to/2qHLyjZ
Yellow Jacket Refrigerant Gauge Set amzn.to/2aenwTq
Refrigerant hoses with valves amzn.to/2aBumVI
Yellow Jacket Gauge set & hoses amzn.to/2vLVkV9
Yellow Jacket 4 Port Manifold w Hoses amzn.to/2BkuGIq
FieldpieceSMAN360 Digital Manifold Set amzn.to/2BdoaD4
FieldpieceSMAN460 Digital Manifold Set amzn.to/2nB4Fe6
Compact Ball Valve for Refrigerant Hose amzn.to/2KUisW8
QuickDisconnect 90 for refrigerant hose amzn.to/2MMtVcg
JB 6 CFM Vacuum Pump amzn.to/2nqbvo8
Appion Blue 3/8" to 1/4" Vacuum Hose amzn.to/2uYlVyc
Appion Red 3/8" to 1/4" Vacuum Hose amzn.to/2uYg6Ro
Appion Valve Core Removal Tool amzn.to/2uYr8WL
Yellow Jacket 1/4" by 1/4" hose amzn.to/2umtcod
CPS Vacuum Micron Gauge amzn.to/2v1nM3O
Supco Vacuum Micron Gauge amzn.to/2v1JRiA
RectorSeal Bubble Gas Leak Detector amzn.to/2ckWACn
UEI DL389 Multimeter amzn.to/2xAdaJf
Other tool links can be found in the video description section.
Shop through Amazon! Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from all purchases after clicking through. Prices are the same as normal- www.amazon.com/shop/acservicetech
Bravo sir....if you’d had done this presentation 18 months ago when I started at the job I have now, I wouldn’t have had to hunt down thermostat diagrams and electrical theory to understand it on my terms how these thermostats work. This should cut out the guesswork of most guys who don’t have 30 years into the electrical field as I have and make installs or the wiring needs easier to apply in their situations...
Thanks Todd, glad to help!
This video was THE clear and detailed description I have been looking for. Specifically, you mention Ruud and Ream heat pumps with their B wire @6:37 which is my system. Thank you so much!
This is the best AC wiring summary to be found, and your diagram is outstanding.
Confused about the connection between the W terminals on heat pump and air handler, and the E/aux terminals on the thermostat. The W on the heat pump is an output (as you say), but the E/aux on the thermostat is also an output. So those two outputs are connected together, so doesn't that cause an electrical conflict (sort of like a short-circuit) ?
If you play this at .75 or even point five speed it's a whole lot easier to listen to what I'm trying to say is you talk way too fast
He is very good & I totally agree w/ u but he talk too fast.( I took ur advice & played the video at 0.75! Much better. Thanks.
I actually used 1.25...makes me concentrate better, maybe absorb better...as long as I can keep up, that is.
How do I do that 😂
Imagine complaining about free help. Just slow the video down, no need to tell us that you can’t comprehend it fast enough.
Ty bro holy I was always just replaying it but thus helps a lot
I LOVE YOUR VIDEOS THANK YOU SO MUCH , I just order ur book as well !!!
Awesome! Thank you!
Can I disable my AUX/EM mode by simply disconnected the AUX/E wire ?
Hey man you help me out so much in the field, and I just wanted to thank you for that. I started my HVAC company 2 years ago quit my high paying maintenance mechanic job and it’s been a roller coaster ride ever since but everything is going very well. Keep up the good work with your channel!
Thank you very much. Your video kept me from having a hot night in Texas. You are an 'A Team' member... and you would be B.A.
I've been looking at several videos on heat pump thermostat wiring as well as talking to a Honeywell tech who gave me wrong instructions. This video finally gave me the correct wiring setup for my Goodman heat pump and a new Honeywell stat with AUX heat. I had a black wire that the Honeywell tech told me to connect to "E"emergency and white to AUX. I asked about jumping the "E" and AUX and he said no. I got no heat in "E" mode so I removed the black wire and jumped the "E" and AUX and everything works. The black as well as a brown wire are "extra" if needed. This video was the only one that said the black and brown were extra. Great Video!
Ha ha, that's awesome! I'm glad it helped you! Thanks for the note!
Outstanding!!! I've been trying to figure out the wiring on my new Honeywell thermostat. This is the FIRST comprehensive explanation I've seen to date.
Hi question, I'm switching from a Trane thermostat to a Honeywell T2 Non Programmable Thermostat on our Trane split system Heat Pump with Emergency Heat strips (I Think). The Trane has a Blue , Orange, Green, yellow, red, and a white wire coming out of the wall, There is also a cross over W1 (White wire) on the Trane going from W1 to W2/X2 on the Trane thermostat Our . The Honey Well has a place for a O/B wire. Does the Orange wire from the Trane go in the O/B slot on the Honeywell or the Blue wire?, and does the Blue wire from the Trane go in the C slot on the Honeywell?
Question I’m trying to figure out a control circuit for a heat pump so I can feed the unit from the tenant panel for Air condition and from the house panel for heat,I want to install some rely to interlocking fro each other,do you have any idea of the best way to do it?
Thanks
Franklin
This is what I got on mine:
Red: to R with jumper to RC
Yellow: to Y
Brown: to C
Blue: to OB
Green: to G
White: to AUX
Is this right?
Yep
Sir, you are an awesome HVAC instructor. Super clear explanations!
Glad you think so!
Boy, my head is spinning from this power-packed information! I watched twice and really have a great grasp on how my HVAC system was incorrectly installed. Thanks so much! Subscribed!
Thanks a lot Sweet T Art! Check out the resources on the website at www.acservicetech.com as well, thanks!
This is great. Thanks for explaining. I've had multiple HVAC guys out to try to diagnose our heat pump/ electric grid system. Each time, after they left and I paid the bill, the system was worse than before they came. Since no one around here seems to be competent, I had to learn it myself. The last time they came, they hooked the white wire to W in the thermostat rather than to AUX/E. Only the heat pump would run, and we didn't get any backup electric heat. I fixed that issue and now both the heat pump and electric heat work!
I still have one issue going on. When the outdoor heat pump turns on, the compressor cycles repeatedly every 15-20 seconds. Also, the large air fan on the heat pump doesn't turn on. It was turning on recently, but between all the guys that have messed with it, it has stopped working. I just wonder if there is anything in the wiring that could be causing this? If I am understanding correctly, the heat pump compressor and fan are both triggered by the same wire?
By the way, the first guy who came out checked the refrigerant pressures, looked for leaks, and said everything was fine, but added a little bit of refrigerant. I don't think the refrigerant is low.
Great description and saved me from having to have service call on some basic wiring.
Great video quick question i have a 3 wire oil furnace if i touch white and blue wire together heat comes on otherwise if i put blue into c it does not work what im i doing wrong
Awesome vid...well presented and explained. Thank you for posting it!
Thanks a lot Steven!
You need to slow the heck down when talking. its annoying
I don't think it matters a lot but it seems to me rheem and ruud are the ones who are doing cooling and heating in relation to reversing valve in the right way and other HVAC manufacturers are
running it in the opposite way lol.
Thanks for your continuous sharing of knowledge!
I think of it in the opposite way because I live in a cold climate. If the coil on the reversing valve is bad, it will still operate in heating mode which would be more of a necessity but it really depends on the location in which you live as far as what a necessity is, thanks!
I agree, I always thought the reversing valve was activated in heat mode on all units.
Hi, I don't understand how come some systems only connected Y from thermostat to outdoor Y but not connected to the air handler. Can you explain that to me?
I think ya did a fine job of explaining the 6 wire layout. Thanks that’s what I needed. (I’m dealing with an old ass coleman heatpump [1979-80?]) As you know an electrician is useless as an AC guy. You might have just changed that. 🤣😂
Really tho… thanks man.
@AC Service LLC - You do know what you’re talking about, thank you for being so honest and spread the knowledge, what goes around comes around.
Thanks a lot Erwin!
Now where's the video explaining something like a train or American Standard Platinum 1050 communicating thermostat (because you have zones) that only has BRD and you have to have Tranes relay panel because your air handler (that is variable speed) and heat pump (which is 2 stage by the way) so all your connections are made within the relay panel because thermostat only has three inputs and only uses the 2 AUX inputs for ventilators and dehumidifiers/humidifiers and has 2 ODS inputs for an outdoor thermostat and nothing else. The relay panel has all the thermostat inputs Which is BRD Y1 Y2 C R D BLK BR BK B/WHT O W1 W2 W3 and finally E.
Where abouts is the sensor connected, and what sort of sensor are these typically? I have a project to replace this and simulate with my own sensor - is this practical? thanks Heatpump is a generic Fujitsu
This video helped me resolve 5 years of Hell. NO WONDER my AC never ran correctly. The custom home I bought (second owner) has a heat pump with two zones and a zone controller. But only 5 wires pulled to the thermostats. This video makes it clear I need a 6th wire for the reversing valve. I followed the instructions with a makeshift 6th wire and my AC works perfectly. Thanks again for making sense out of this for me.
Glad to help Sheldon!
Craig, or anyone here. I have a honeywell t9 thermostat. I'm pretty sure I wired it correct. One problem is when in cooling mode, then pressing circulate the AC condenser runs.
In heat mode, then pressing circulate, just the blower runs. Any ideas or just contact Honeywell?
It does cool and heat normally when in normal mode.
I have a xe 1200 trane, and t8411 1101 thermostat , both o and b are used, o - orange , b - black, trying to change to honywell rth6580wf. don't I need both o and b ?
From my heat pump, the tech installed - Orange, Blue, Red and black going to the control board at the furnace. But I’m not sure where they would go to. On the control board it shows - W , C, R, G, and Y
Hi, I just installed a MrCool 36K Hyper heat ducted system , it works fine with the thermostat that came with the unit. But I would like to use my Google Nest gen3 thermostat instead. If you or anyone, can help me with how to wire the Nest that would be great. Thank you very much. Noel.
Yeah that's if the installer before you using the standard color codes. I know a building that used blue for O/B and Orange for common and other colors off matched. Sometimes you just have to verify what colors are hooked up to the control boards.
You always need to look at the indoor unit when replacing a thermostat and look at what terminals the old tstat was connnected to. This was more for when you are installing it and running the wires, thanks KCTech!
Rheem / RUUD system units
My heat pump would not come on only the electric elements in the air handler. I tested voltage at the unit and all was fine. If I jumper the Yellow and white at the control board on the outside unit the heat pump comes on and works. The Ac will not cool with it jumpered. I am in Florida so don't use the heat much and just did the jumper trick for last winter. This year I ordered a brand new control board thinking that was the problem. Heat pump will still only work if I put a jumper in on those 2 wires. Any Idea what else to check? Otherwise, I will just keep doing the jumper as we only have +- 12 days year to run heat anyhow just a bit of a hassle to have to remove the cover and put the jumper in and out.
Rheem / Ruud ,,, B is reversing valve. Activated in heat mode instead of cool. 🤔
Hey I currently have a oil fired furnace and I installed a Goodman 5-ton with a heat pump do I need a relay to be able to have the heat pump or the furnace I know you said that the heat pump will be emergency
First 🤔 but this early ACSERVICE TECH?
Ha ha, yeah a little early today! Thanks Gabriel!
I’ve got 7 wires for my heat pump. All are the same except Brown goes to E and White goes to Aux. How does that work in my case?
I understand the wiring. How would i wire the heat pump system with a gas furnace? Me being a Pa resident we don't have air handlers The O is geting me confused since the board on the furnace don't have o
Our royalty Bin Rashid daughter mah_alkatoum sheikhamah sweety you hate me iam so so sick you mahalkhoutum you travel with your lover you enjoy life iam living with sad so sad more years i try to made love friendship but you have better lufe with your loves man so wish you al the best ever best luck always to you and better life from so iam wate guy from colombo work saudi tou known as last several years
I am building a small concrete house. i think what i am wanting is a water to water heating and cooling system. i will plumb the floor and the walls. there will be no air or ducting or fan. will i be able to set my temperature to 74 year round ? thank you for being here.
Can I use a heat pump thermostat on regular a/c ?
Should the AUX a E always be jumpered? Thanks.
It would depend what types of systems you have. This is for a heat pump with elect resistance heat, thanks
Awesome straight forward .. summarize few hours in few min towards the point with ALL its variants !! well well done sir
I installed the WF honey well from the non WF honey well the new WF is not switching my valve is this done by the program. ??
Very thorough lesson.
Thank you sir!
Thank you Tomon8tor!
If my heat pump is not functioning and I want to change my primary heating from Heat Pump to Furnace which wire do I need to move in thermostat?
Humm my old thermostat had a blue wire on the c terminal & it looks like now my blue wire should go to the b terminal on my new thermostat. 🤔 Well here goes nothing
Why would the O wire have 28 volts when I'm calling for heat, the AC come on still
Thanks. My outside heat pump(Rheem 13PJL30A01) unit won't turn on at AC mode. Traced inside and outside, everything seems fine except the outside contactor coil does not receive the 24V for start from the DFC control board.. On the control board(DFC), inlet wires from the house on lead R and C has 24V, but the out leads (Y and CC) that go out to the contactor coil has no voltage. Can I fix the control board DFC? or have to replace the DFC? Many thanks.
Thank you so much. I needed to bypass my cdef board. I think the contactor relay is fried. Bought a cheep Amazon board DOA no lights when connected and CB turned on. FRUSTRATING. You get what you pay for. I normally do Aircraft and Automotive AC.
This was exactly what I needed to get my house cooled off while I find the right board.
I did wire in my pressure sensors. They work fine, good 410A refrigerant pressures. Just a bad board.
Hvac co estimated $1,101.68 to replace the 100 board with less than 20 push on or screw on connections... Give me a break. I said 1/2. No way we will starve. Never mind I will fix it myself!!!!
Thanks yo you its working perfectly and safe in cool mode until I can get the board.
could you make a video on wiring for the Honeywell r8184m1051 protector relay control board I can't find a reliable source anywhere
Jason, thanks for letting me know what you would like to see!
My thermostat says not to use W terminal for heatpump applications, where should I land it then?
Please help, as my HVAC contractor has been unable to address the issues so far. Below are the units which have been purchased and installed in my residence. The installers have spent days re-wiring my Nest thermostats and they still appear to not function properly. Can you provide assistance? Can you provide a definite answer that 3rd Generation Nest should/will work with the below devices? If not, why not and which SMART thermostats will work? I have seen my neighbors with brand new and modern Carrier and Goodman systems which do not have any issues with Nest Gen3.
AVZC200481
4 TON AMANA HP - INV.
AVPEC61D14
AMANA AHU
Thank you,
Very good 👍
Cooling works fine, but when I try heating mode, it doesn't turn on. I'm not sure what I did wrong here
Best, just best explanation on You tube I’ve ever seen! I've little bit been confused about Aux and Electric terminal on heat pumps. California. Now the wiring combinations is clear to me. BIG thank you, Craig. Interesting, so electric strips helping to achieve set temperature faster. Also, I've met a gas furnace on Aux in Seattle. Coool!
Hey Tapch MC, glad to help and thank you for your support on Patreon.com/acservicetech - Yeah so aux is powered when the thermostat notices that the heat pump cannot keep up on its own or the temp is set up to far compared to the actual temp in the building. The electric strip heating is downstream of the coil so it won't effect the coil's heat rejection and will add to it to get the air hotter, thanks and look at some of the other videos I linked in the 18 thermostat video playlist in the description. There are others that describe the aux too, thanks!
I’m trying to replace the thermostat for a friend with heat pump, but he has a sensor with 2 S wires wired into his old Honeywell thermostat. Don’t I need to be able to wire those? My heat pump had a sensor connection, too. Nothing about the sensor here.
Can we install ducted cree brand heatpump with 2 thermostat for diferent house zone?
I have a Goodmans Heat pump AC Air Handler and Condenser and a Nest Thermostat installed in 2014. Yesterday the Nest showed no power. After an extensive test with Nest online chat it was concluded thermostat is OK and fault is probably with Circuit board in air handler. Sure enough I found the fuse had blown on the board (PCBFM103). I replaced the fuse, fired up and the fuse blew again. I have ordered a new board (now PCBFM103). This got me looking at the wiring. There are only 4 wires going to the condenser connected to Contactor/C, R, Y, and O on the condenser and one of them is connected by alligator clips to one side of a resistor on the PCBFM103 circuit board. None of this makes sense looking at your wiring diagram. Any ideas for resolving this puzzle would be most welcome. Thanks.
What is my Aux Heat is Natural Gas? Will the heat pump still run WITH the gas Aux Heat?
Great video Craig! I was referencing this the other day installing a hybrid dual fuel system just like the setup in your video. My question is if the heat pump terminal strip has a "D" Defrost terminal which is energized with 24v when the heat pump goes into defrost mode can I run a wire from the heatpump "D" terminal to W2 on the furnace terminal strip so the furnace comes on while the indoor coil is getting cold in Defrost mode? The defrost is controlled by the heat pumps Board or one of its boards.
Hello. First, awesome video. I finished wiring new heat pump and elec furnacea, everything works A1 thanks to your videos. I only got one question, hope you can help: at the end of swapping old system with a newer one ( bought second hand) i still have a temp sensor left. It was hooked om the indoor coil, but i have no idea were it should be pluged. Both wires are red and i have no indications. Tried to found the answer elsewhere but non succes.
So what does this sensor do and where it should be plug ?
Thank you.
Ok figured out the problem. The PCB had been rigged to bypass a soldering fault in the G connector plus something had gone low causing the fuse to blow. The PCB should have been replaced at initial installation. Shoddy work. New PCB cost hardly anything and all is up working fine thanks to your TH-cam and Nest (great customer service). I now understand all (well almost all) of the electrical side of my HVAC Thanks again.
Very helpful but still confused for my heat pump thermostat. There is no C. I have a W, Y, R, G and B (Rheem) that I understand. Then also black wire to E and brown wire to X. One must be auxillary heat, the other? Hoping to wire a smart thermostat.
I have a question, I have a non fused disconnect, but my ac went out so i am doing away with it and instaling a window ac/heat, it runs off 220 just like my ac does, so can i swap out the non fused cut off box for a 125 amp sub panel with a 220 breaker for my new ac window unit?
Hello
The C wire is only carrying volts back on it path to the contactor.?
I have a Fujitsu mini split, I use a adapter (UTY-TTRX) to connect to nest. On the adapter it doesn’t have O/B input to connect to. On the nest it show the wire are connected. When I call for heat it light up orange, but the air handler doesn’t not power on. Thanks
What would happen if the G wasn't hooked up - doesn't the Heat pump see the call for R+Y and know to turn the fan on using the internal furnace board logic? Is it really necessary for the thermostat to call for G in parallel? I was under the impression the G+R call is specifically when you want airflow without heating/cooling.
I had to watch this twice to get it but I'm not qualified as an a/c guy. After the 2nd time, I realized the function at the thermostat changed the voltage command the respective part or parts to run Air , cold air, reversal to heat, resistance heat, and emergency heat. At least it helps understand also what is not happening when your trying to get heat or cold air. I'm gonna take a class if I get a chance .
on heat call with auxillary heat on, there's 24 volts on R,Y,G, W/aux right?..if you are using high speed on cool and low speed on heat , how do you not sending power to both speeds of the blower fan if G and W are both energized?.....been looking for a diagram/explanation for a lil while now, could not find one....thanks in advance!
I was working on a heat pump package unit and programming the new customer supplied thermostat and no e terminal was present but when put into emergency heat the heat strips would turn on and compressor would not turn on my question is if the Y and O terminal are not powered with W and just W is powered does that activate the heat strip as well because the thermostat knows no E terminal is present?
I have a question . I am going to replace my old thermostat that has only 4 wires connected R, G,W and Y. The B is not connected. My new thermostat has batteries, but the panel doesn’t have a letter W, do I connect the W wire to E?
I thought common was black wire? Someone help!
Why would the thermostat send power to the fan relay in aux heat? I thought the fan was turned on by the sequencer with electric strip heat, and then through the fan relay's NC contacts? If you send power through g in aux heat you would have the fan running in high speed and subsequently reducing the heating efficiency the heat pump is producing.
Did you explain how defrost work? I may missed it here
So is it possible to rewire to plug without the furnace an thermostat?
Actually you spoke at my speed and I’m tired at 11pm. Wrapping up a heat pump installation and I’m sucking up this information as I get confused 😐
Thank you!
I am going to be buying a new house. I wanted to possibly get a nest or another smart thermostat in place of the old thermostat. The unit at this home is an older Lennox model from 1995. Its a 2.5 ton unit. I dont know the exact model number, but I will find out soon. It is a heat pump, and also has an emergency heat stage with heating elements. Will these newer smart thermostats work for something like this? Any recommendations or advice on this?
Regarding the Nest thermostat same wires application?
about the wiring, I have an older Honeywell thermostat & I was told that where I have a white wire going to the "W2" that on the newer Honeywell connect it to the "E" slot. I have a heat pump with emergency heat. Is that correct?
Why would my black and white wire both be on the W in the thermostat?
GREAT for DIY installation. Saved me from a cold night ! Thank you !
Glad it helped!
Can you explain the variable speed hvac thermostat wiring and controls?
Hi i have just 3 wires can i use G wire for C to install wifi thermostat ?
Hello Sir,
Is it possible to add reverse valve in the inverter ac's. The ac is of R32 gas and 2.2 ton mitsubishi electric GR series.
If possible then what are the changes
There's a guy just going through the motions slow your roll
I would have had a much better day today if I watched this video 12 hours ago lmao. Oh well, at least now I know better
This answered a question I had yesterday. Thank you!!
Awesome! Glad to help!
How would you wire in a safety float switch between thermostat and air handler or heat pump? To cut power if water builds up
My thermostat or heat pump only has four wires coming out red blue green and white how do I hook a thermostat up to it does anybody know
How many views man. You have got it going on. Keep it up
This was exactly what I needed. Thank you for the great explanation!
You are great it's very helpful.THANK YOU.
Glad it was helpful!
Is 28V too high? Also, is any measured voltage between 24 and 0 on any wires (yellow in my case) indicative of a problem? I am getting 6.7V on the yellow wire at the condenser unit with the thermostat in cooling mode but setpoint above the room temperature (so that cooling is not called on).
So is it normal that when I went to install my nest, there were two wires (black and brown) that were unconnected to anything inside the wall? Also my thermostat had the white wire hooked up to the W2/aux terminal instead of the W1.
There may have been extra wires run. Were they connected in the air handler?
I followed the wire it seems to be wire nut attached to the white W2 wire at the air handler and in the same wire nut is another black wire going out to the outdoor unit. I think it’s for emergency heat.
how to check for 24 volts at the thermostat wiring
Very difficult to follow circuit when the black block with instruction information cover the data.
thank you for 2 days I have been trying to figure out why my heat strips were connected to the outdoor unit and had the misconception that the W terminal from the thermostat was the heat command . your explanation provided complete understanding of how it actually works
My friend’ how the heat pump work I need turn on the heat
What if you cut just the fan on but the whole system cuts on