How to Test a Heat Pump Thermostat!
ฝัง
- เผยแพร่เมื่อ 28 ก.ค. 2024
- In this Heat Pump Training Video, I go over How to Test a Heat Pump Thermostat with a Multimeter to Verify if it is Working Properly. I go over the Heat Pump Thermostat Wiring Color Code and show you exactly what the tstat should do if working correctly. I also give you wiring tips! Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
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Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided.
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Good video. Straight forward and gives me a little insight on the thermostat workings.
Thank you for all you do for the hvac community. Merry Christmas.
Merry Christmas to you too Wayne, thanks!
Have a great and very joyful holidays!
Thank you.
Thanks Octavio!
Best explanation on this that I have ever seen! Thanks!
Thanks Nick!
You have the most thorough videos. Thank you.
Thanks a lot Paul!
Good video explanation well done. Thank you.
Thanks Ray Ray!
Nice, Craig. Another one added to my ‘favorites.’ Merry Christmas and Happy New Year!
Thanks Merry Christmas!
Excellent and concise tutorial!
Thanks Agate!
always good information, thank you ...
Thanks Pei Broker!
Thanks. Excellent video as usual.
Thanks Naser!
As always great job. Merry Christmas
Merry Christmas Channel Cat Chaser!
Excellent n very informative video !
Best video on thermostat man!!!
Thanks Pedro!
The best explanation I’ve ever seen!!!! Thank you man!!!💪🏻 more heat pump videos.
Thanks Tapch MC!
Cool presentation
Thanks Felipe!
Perfect video thanks!
Glad you liked it!
Excellent video
Happy Holidays.
Thanks Ron! Have a great Christmas!
Very good video.
Thanks a lot Kenny W!
Good job
Ty nice video
Thanks Johnathan!
Thank you..Excellent video....Am having the intermittent problem of air handler continues to run after compressor shuts off.
Took some V measurements while in the fail mode..At the air handler:
Air Handler.Terminal strip.
Note: All voltage measurements taken to unit ground wire.
1. Red Wire...27.74 vac
2.Green Wire ...27.4 vdc
3. Removed the blower connector
and Fan stopped....ok
4. Green and Red wires both still 27 Vac
5. Removed the T'stat
6. Green dropped to 11.3 vac and down to 10.7vac...did not drop to zero vac.
Red increased a bit to 28.19 Vac.
W 1,2,3 at 0.18vac
Reinstalled the stat. Switched to off.
Turneded the main power switch off and On for the unit..
Waited 15 minutes.
Placed the t'stat switch to cool.
Unit functions normal for a few days.
Re Read Red and Green after a few normal cycles and Green goes to basic zero at end of cooling cycle and blower stops normal.
Thermostat suspected...Blower does stop when stat is removed during the fail mode.
Thanks again for the excellent video!
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Good sir
For that setup, would you have the switch on the back of the thermostat set to electric?
I just bought this exact thermostat. My old t-stat is a mercury seitch from the 80s. Its a heat/cool/em heat heat pump unit. On mine the brown wire goes to emergency heat. Your demo uses a jumper. Does that apply to my situation as well? I iust abandon the brown wire?
How do you reverse the reversing valve if it is bad. How do you switch it from cooling to heating?
Thank's for all this information. So helpfull. Have another question. Usually a TD on a furnace can be between
18 to 22 degrees for an Air conditionning If i'm right. Do the TD would be about the same when it's on heating with a heat pump?
It could be 30 degrees down to 10 degrees, depending on the temperature outside, thanks
Thank you Craig! Great video.
Can you make one with auxiliary heating and back up heating fiscal connections.
I will try to subscribe to your package videos web.
Hey Octavio, are you talking about Patreon.com/acservicetech? Also in reference to the auxillary connections, do you mean where they connect inside the air handler to the auxiliary heating? Here is one on that- th-cam.com/video/7_-x6u9uzhU/w-d-xo.html
Hi any video wire a Bosch heat pump out side and inside true the thermostat?
Could you please show how to wire a white rodgers thermostat and explain what all the terminals are on the inside.
You definitely sound like you know exactly what you are doing. Can you provide assistance? I have a Lennox Heat pump (Series XP14) and Air Handler (Merit CBX25UH) which I had installed to replace my original unit; I've since changed out my damper motors (Honeywell M847D) on both zone 1 and zone 2, my Zone Controlbox (HZ322), and thermostats (Ecobee 4). My wiring coming in from my Air handler to Zone Control Board is set at RC, Jumper on W2/E, O, Y1, and G. The Zone 1 (Downstairs) is wired R, C, W1/E, W2, Y1, G, O/B ; Zone 2 (Upstairs) is wired R, C, G, W1/E, and Y1. I cannot tell how the heat pump is wired; however I've had horrible experience out the entire setup (Cold in the winter, Hot in the summer), every maintenance person I've had, says everything is wired correctly, however in this video you say Y2 should be used. I cannot keep paying for someone to come out and tell me it's wired right, can you please help, Thanks!
Are you using a 24v transformer to supply the thermostat?
I have a screwy situation on a heil system. Aux heat doesn't come on automatically although the tstat says it's on and I read 24v on w at the fan coil unit. I can manually switch to em heat any strip heat comes on. Any ideas?
Hi sir how to identify mismatching compressor, condenser coil, evaporator coil, condenser fan motor, evaporator fan motor, thermostatic expansion valve, filter drier, capillary tube. Sir please give me some ideas. Thank you
I have the exact same thermostat, for some reason after I put new batteries in mine it started acting up. If I set the AC to 78 the temperature would increase to 78 also even though the room temperature was only 72. It was causing the AC to stay on causing my house to get cold. I verified my room temperature with a separate thermometer. Time for a new one? Any suggestions? The batteries are installed correctly.
I have voltage on O during all setting heat, cool, fan AC Service Tech LLC
Are you talking the O reversing valve terminal?
AC Service Tech LLC yes
AC Service Tech LLC yes
If you are talking at your thermostat, if the thermostat dip switch is set to heat pump then you should only have voltage during cooling. To double check, make sure to take the o and disconnect it at the indoor unit. Then call for fan, heat, and cooling to see if you still have voltage. If you don't then you know your thermostat is good and it was backfeeding from somewhere. If you do have voltage the either the thermostat settings are really wrong if it is a newer thermostat or just bad especially if it is an old tstat, thanks
AC Service Tech LLC thanks had a power surge on both inside and outside units replaced air handler control board, transformer, thermostat and defrost board as well
Great videos like always.
Q: can we test with R instead C OR it doesn’t matter? I always though R is the one tou will be testing with. Thanks again
R is power and you need to put the other probe on C or ground to read 24v on the multimeter. If you are going to jump wires then it is r to g for fan, r to y and g for cooling, and r to w for heat, thanks
Thanks you 👍👍
I have a goodman heat pump split unit. The unit blows hot in heat mode. Outside temps range from 30 to 50 degrees F. But at night it blows cold around 1 and 4am. i place the unit to emergency heat for 20 seconds and then back to regular heat. Everything works fine after that. But this is every night. What could be the issue.
I have the same one so how do I if the wires r crossed cause its blowing cold air with the heat on?
What could the issue be if my heat pump is running when it’s 20 degrees outside. Shouldn’t it switch auto to emergency heat?
Do u have training class ?
This will help me figure out which wire does what on my old mercury 1980s honeywell q674f 1220 thermostat. Its been kicking my butt, as half of the wire lettering doesn't match up with anything modern, and i can't find any info on it anywhere on the web! For example the c wire connector turns on the compressor 🤦🏻♂️
good job !
Thanks Copper Man!
When using this thermostat on a non heat pump system, in other words, just AC and heat strips, is it possible to wire it so the heat works on the regular heat setting, without turning on the compressor? I have it wired correctly, but my AC and heat run at the same time. The only way I can get just heat is to use the emergency heat setting.
You could try putting it in standard heat and ac mode and power the the heat strips with w but you would then need you would need to connect w and g in the air handler so the fan turns on. Make sure the airflow is set for the correct speed if there are dip switches or wire connectors for speed, thanks
hey acservicetech, I was wondering if you could make a video on how to test a circuit board. One like you're working on!
Hey Christian, did you check this video out. Basically we troubleshoot a board by what it doesn't do in the sequence of operation, thanks and Merry Christmas to you!
th-cam.com/video/phsUYxo75jU/w-d-xo.html
Merry Christmas! thanks! ill check it out!
Hi..what if i only have 20 volts on the orange wire (reversing valve) what could my problem be?
When the aux heat comes on , why doesn't the compressor shut off? Doesn't make sense to run both.
I got a buddy who bought the rth2410 thermostat for his heat pump at lowes different manuals I find are for the rth2510 and 2410 but they aren't the same cause the 2410 has no w/aux terminal all it has is a W terminal when he turns the heat the compressor isn't coming on only electric heat is working no heat pump i have went through the programing several times and made sure all the settings are right they are i just think the thermostat won't work for a heat pump. Has anyone else have any knowledge or experience with the honeywell rth2410.
What if C is not wired (battery-powered) how do I check 24V on R ?
Hi, quick question I've been unable to find the answer to anywhere: When in cooling mode, once the target temperature is reached and the Y and G terminals are opened, does O stay closed/powered as long as the thermostat is in Cooling mode, or does O only close while Y is active and then open again when Y is opened? (Mainly I am wondering if it's bad for the reversing valve to reverse [back to heat, by default] before the pressure has equalized. I assume it will still operate/slide for a while after the pump has stopped, just due to residual pressure differential?)
(Put more simply: Does the O line stay powered up all summer long while the thermostat slide is on Cool, or does it just power on when Y does?)
Acservicetech, How crucial is an analyzer for an Hvac tech? They price in about at 350. Is the tool worth it or optional? How often do you use it?
A combustion analyzer is used to determine if there is a crack or clog in the heat exchanger, verify good combustion air, setup and adjust oil fired furnaces, and are used during a pm check of a heater. They typically price out 5-600 and for the kit with the printer 6-800, thanks Uei, Bacharach,, Testo
acservicetech is fieldpiece hg3 analyzer same thing? Worth getting it?
I thought you were just talking combustion, ok. Honestly not really and you would also need all the attachment heads as well. As the employer, I would rather have the answers in my techs' head then in a machine that they have to rely on but I am only just one person, thanks!
So, first check to make sure the thermostat is getting 24 volts from R (power) to C (common).
IF the thermostat is calling, then you would expect to read 24 volts between the function (Y-cooling, for example) & the common.
Yes Correct, thanks Adam!
@@acservicetechchannel Thanks!!!
I have a fun that run for only about 1 minutes and goes off the transformer was bad and replaced also thermostat was bad and fun still not running properly what I should suspect next
Is that fan a psc, ecm, or ecm variable speed, thanks?
Why would I be getting 24v to everything until I check the C to Y, then I only read 14v.
I connected green and red nothing happened
I don't understand. No power from common to o when heat pump is on?
O is not energized in heating
@@josephwhitfield3554 but on rheem it is right?
@@techfive7202 yes
You want the c wire!
For sure!
W hea
Hetpump systom stage 2nd strhe us ing coomn c rc 24v y2 stne stage us inf hetpum p o rwvising vlave 23 v .using