Thank you sir. You just saved me 13K on a new system the HVAC guy was trying to tell me I needed. Replace the transformer, and everything is now working perfectly. Cost $27.
This week I diagnosed a bad control board because I saw no LED light on the board.This york package unit had a transformer just like the one in this video, and I did not know how to test because I rarely see them and because of my lack of knowledge I didnt test. I more experienced tech went out after me and did all that you just did and the transformer had no 24V coming out which powers the board. Man, I feel so dumb. This video will save me!
Brother , believe me you could make your self the best instructor if you open your own school. I had few old school instructors/ hvac gurus explain to me about transformer, yours by far is the best . Because you explained everything A-Z
Just what I needed! Needed to replace the transformer and was not sure if the 24V output was DC or VAC. Seeing your meter set to AC cleared that up for me. Now I feel confident I am ordering the correct after market transformer. Thank you!
Very grateful for your excellent video. Last night we spent a very warm night at the Florida keys because our A/C would not turn on. I spent several hours last night trying to find the problem. This morning I watched your video and was able to find the control board with a blown fuse hidden under a couple of steel covers inside the air handler and fixed the problem. I had called several air conditioning companies and the soonest I could get one to come was tomorrow. Thank you again.
Thanks a million. I just fixed my 38 year old a/c unit. Thanks to your videos. I'm not sure how much money you saved me(28 dollar part) but I don't care I wasn't going to pay it. Loool. Thanks!!!!!!!
Thank you so much for this video. After watching,I was quickly able to replace transformer ($15), get heat pump working again, saved $ by avoiding a service call charge.
This video was perfect. The problem ended up being a bad Transformer. 120v coming in but no 24v going out. All the instructions and tips were spot on...thank you
I could kiss you ! Finally a teacher on youtube who takes into consideration how our brain processes information. Thank you so much for shining your light and sharing knowledge with us.
Man, such an informative video. I'm just a regular Joe that likes to fix my own hvac, and this was extremely helpful. I wonder how much money I have wasted on throwing away good transformers.
Brilliant! This is simply the best video on testing the transformer I have seen, period. I have also found that replacing the contactor is quite common and wise to replace both when the contactor is bad, which I guess many times will fry the transformer? Again, you made it super easy! Thanks bro.
Thanks man I really appreciate this information during these hard times. I've found that my furnace has 120 volts coming in up until the transformer . Then it stops and I have no 24v volts. Just ordered the replacement transformer. The circuit board 3amp fuse didn't trip so I'm praying the board is OK. Upon further inspection of the transformer I've noticed what looks burnt cheese and the black terminal wire connection to the coil in the transformer is toast. I'm betting betting that's stopping me from getting the 24v. Now I gotta figure out why this happened. Again thanks for the info I know this comment is lengthy but I really do appreciate the video keep making great content.
Another simple test is to feel with you hand if the transformer is warm. If Warm most likely all is good but may still have issues, get out the voltmeter and double check.
In this example, I can see you are using a 40VA Transformer. How do I determine the size of theTransformer in case I got no the Electric Diagram . Excellent Video!!!
Wow!!! I love the way you explain this. I learned a lot watching this video. You explained very clearly, and easily to understand. I will continue to follow your channel.
Hi question to better understand Why you first check voltage between red and blue wire ( green ) coming directly from transformer then when checking at minute 8:28 you check red and green wire but not the green coming from the transformer connecting to the blue wire Thanks
Thank you, very awesome video and control board! So, I have 0.0 volts between C and R at my thermostat which could be the transformer but if it is an overflow switch would that cause the 0.0 volts? I have an electric heater and A/C combined to heat/cool the house. Any info would be appreciated! Thank you in advance! God bless!
Very helpful video, thanks for posting. Im troubleshooting my reznor garage heater. It turns on runs a few cycles fine then when i come in the morning i can tell it hasn’t ran all night. Trying to figure out if its the transformer or if the circuit board is bad
Thanks teacher ..I fill more confident on my next transformer test on the next work order I will get I'm maintenance and I will use this info..thanks..
Thank you! You can still check between R & any other terminal wired. As long as the thermostat is in the OFF position, between R-Y, R-W & R-G, there will be a 24V reading. This will indicate your transformer is good. You can always also just check the 2 wires leaving the transformer but to save time, this method will work🙃 Thanks for watching! Stay tuned for new videos every week! 🔧
thanks bro...I got a bad transformer. 240 going in, yet not showing 12v at the stat. and of course that faint burning smell in the unit by the transformer. Like the transformer in a neighborhood in the sky on the pole, they burn out.
What is a step down transformer? Is the transformer in the furnace the source of the "RC" or "RH" power that the Nest Thermostat uses on the wall? Is it possible for the furnace transformer to not send enough power to the thermostat but enough to the furnace?
I have a bard package unit that is tripping the 3 amp breaker on the low voltage transformer when set to heat. Do you have a video to test that problem?
great video, my transformer has a blue and yellow wire on the low voltage side. the blue has 24v but yellow has no voltage. My unit works fine as far as I know. does that mean I need a new transformer? I have no control board.
Thank you. Can you help me how can I recognize the wires if the primary have 440v, 240v and 110v by using Multimeter? As there are 4 wires Red, White, Black and Brown. And how can I recognize the Common wire?
I just moved into a new home and want to instal an ecobee. I went to the transformer and only have 1 segmenet of 24v through the RED secondary, the GREEN secondary is grounded and doesnt have constant 24v. The GREEN wire is connected to my BLUE C wire. the result is that Im not getting constant power to my thermostat C wire. Is this a wiring problem?
Great video! Question: my inline fuse from the transformer (blue wire) is blown. The secondary was not producing 24v, so I put a known good transformer in and it blew the fuse again. Could my board have a short in it that is causing this issue?
You have anything on how to hook up a 480 to 120 vac step down transformer? I get that you have your com and your hot but with 480vac there are 3 wires that are hot I get confused when I read your supposed to ground your com. Any help here would be great
My black and white wire have female connectors, that go straight to the control board, should I stick the leads in them to see if I get the 120 volts?, Will that work?
I realize this is about Air. Hopefully someone can help me. Question? I have an overhead Reznor heater. Should there be 24 volts at the thermostat if the system goes into lockout due to a faulty flame sensor. Thanks again For great videos
hello I got carrier AC /furnace now regarding the transformer black wire going/connect to PR1 ? and the white wire to SPEAR 1,2,3 ? (motherboard ) thank u
Good video but i have an unusual proble. 240v going in bur ony 5.0 volts coming out. New transformer , same, another new transformer,same. Go to different source for 240v, 24v output now. Any ideas,why?
Thank you! I might sell them one day & would take a custom order if the opportunity came up. You're very welcome & stay tuned for new videos every week🔧⚡
This channel is invaluable. Thanks for sharing.
Thank you! I appreciate you watching & your feedback 🙏 Stay tuned for new videos every week! 🔧
Thank you sir. You just saved me 13K on a new system the HVAC guy was trying to tell me I needed. Replace the transformer, and everything is now working perfectly. Cost $27.
Man that’s SCARY!
Whered you get a transformer for 27$ lol
Make sure you out that scummy company with reviews and complaints to state authorities
lol 👍🏼 we’re not all like that 😂
This week I diagnosed a bad control board because I saw no LED light on the board.This york package unit had a transformer just like the one in this video, and I did not know how to test because I rarely see them and because of my lack of knowledge I didnt test. I more experienced tech went out after me and did all that you just did and the transformer had no 24V coming out which powers the board. Man, I feel so dumb. This video will save me!
Brother , believe me you could make your self the best instructor if you open your own school.
I had few old school instructors/ hvac gurus explain to me about transformer, yours by far is the best . Because you explained everything A-Z
Just what I needed! Needed to replace the transformer and was not sure if the 24V output was DC or VAC. Seeing your meter set to AC cleared that up for me. Now I feel confident I am ordering the correct after market transformer. Thank you!
Very grateful for your excellent video. Last night we spent a very warm night at the Florida keys because our A/C would not turn on. I spent several hours last night trying to find the problem. This morning I watched your video and was able to find the control board with a blown fuse hidden under a couple of steel covers inside the air handler and fixed the problem. I had called several air conditioning companies and the soonest I could get one to come was tomorrow. Thank you again.
Man that’s good troubleshooting!
Very good lesson. Talk at the speed or us to learn, unlike the other fast talker trainers. Thanks
Thank you Sir! You will be abundantly blessed because you are blessing others!
Thanks a million. I just fixed my 38 year old a/c unit. Thanks to your videos. I'm not sure how much money you saved me(28 dollar part) but I don't care I wasn't going to pay it. Loool. Thanks!!!!!!!
Thank you so much for this video. After watching,I was quickly able to replace transformer ($15), get heat pump working again, saved $ by avoiding a service call charge.
This video was perfect. The problem ended up being a bad Transformer. 120v coming in but no 24v going out. All the instructions and tips were spot on...thank you
I could kiss you !
Finally a teacher on youtube who takes into consideration how our brain processes information.
Thank you so much for shining your light and sharing knowledge with us.
This was the easiest explanation of this concept that i can find. Thank you so much!
You're very welcome & thank you! Stay tuned for new videos every week🔧⚡️
Man, such an informative video. I'm just a regular Joe that likes to fix my own hvac, and this was extremely helpful. I wonder how much money I have wasted on throwing away good transformers.
This was exactly what I was looking for and super helpful. Thanks for sharing your gift and talents with us.
10 minutes of video I learned a lot on the transformer the way you explained it was very comprehensive that was a excellent
Thank you, you did a great job explaining. Very clear and understandable. It helped me a lot.
you are real teacher-very easy to understand for everyone!tnx!
Good day bud. What a beautiful and God gifted teacher you are. Everything you said crystal clear.All the best
Thank God that I encountered to you this platform , you are a genius .
Making a diy incubator. Next I'm going to look for your entire training board explained. Thank you
Sounds very interesting. You're very welcome & thank you! Stay tuned for new videos every week🔧⚡️
Really appreciate this video. You’ve been a big help since I joined the industry a couple months ago
Thank you! I'm glad my videos help! Appreciate your feedback 🙏 Stay tuned for new videos every week! 🔧
Brilliant! This is simply the best video on testing the transformer I have seen, period. I have also found that replacing the contactor is quite common and wise to replace both when the contactor is bad, which I guess many times will fry the transformer? Again, you made it super easy! Thanks bro.
Very helpful. I watched both of your hvac transformer videos before sucessfully replacing mine. All your videos are so helpful. Thanks again.
Super great video. Very detailed and finally someone explained in detail what the numbers mean on the transformer.
Thanks man I really appreciate this information during these hard times. I've found that my furnace has 120 volts coming in up until the transformer . Then it stops and I have no 24v volts. Just ordered the replacement transformer. The circuit board 3amp fuse didn't trip so I'm praying the board is OK. Upon further inspection of the transformer I've noticed what looks burnt cheese and the black terminal wire connection to the coil in the transformer is toast. I'm betting betting that's stopping me from getting the 24v. Now I gotta figure out why this happened. Again thanks for the info I know this comment is lengthy but I really do appreciate the video keep making great content.
solid, straight forward and accurate, easy to understand info deserves a like and comment.. plus ya got the today was a good day song.. cheers
Interesting and helpful video. Well explained and excellent presentation . JMT thanks for sharing with us this valuable info.
Thank you very much! I appreciate the support 🙏 Stay tuned for new videos every week! 🔧
Another simple test is to feel with you hand if the transformer is warm. If Warm most likely all is good but may still have issues, get out the voltmeter and double check.
Great explanation!! Thoroughly enjoyed that as it was so well explained. Very much appreciated
In this example, I can see you are using a 40VA Transformer.
How do I determine the size of theTransformer in case I got no the Electric Diagram .
Excellent Video!!!
Excellent, very interesting for me as a young tec. Thank you.
Wow!!! I love the way you explain this. I learned a lot watching this video. You explained very clearly, and easily to understand. I will continue to follow your channel.
WOW, this is so fun! Really helps break everything down easily. Thank you!
Hi. Thanks for the great video.
I was wondering how to bond the zero volt of the control transformer to the chassi of the machine?
Thanks again?
Very good explanation and demonstration appreciate you Great 👍👍💐
Thank you very much! Stay tuned for new videos every week🔧⚡️
Great video, but you didn’t say which 24 volt wire is hot and which one is common
Hi question to better understand
Why you first check voltage between red and blue wire ( green ) coming directly from transformer then when checking at minute 8:28 you check red and green wire but not the green coming from the transformer connecting to the blue wire
Thanks
This channel is so awesome. I learn a lot from the videos. Thanks for sharing.
Thanks for a great explanation and diagnostic
This is nice brother, new tech here trying to learn as much as I can.
Great job on the explanation and the demo board!
Very helpful.
Great video. Easily explained. Thank you.
Very good teaching great teacher
Great explanation and easy to understand
Thank you man! The training board videos are some of my personal favorites. Appreciate you watching & the feedback 🔧⚡️
Loving these weekly vids 💪🏼
Awesome! Glad you do 🙏 Stay tuned for new vids & be safe out there 🔧⚡
Thank you, very awesome video and control board! So, I have 0.0 volts between C and R at my thermostat which could be the transformer but if it is an overflow switch would that cause the 0.0 volts? I have an electric heater and A/C combined to heat/cool the house. Any info would be appreciated! Thank you in advance!
God bless!
Great video for beginners. I check voltage at transformer
Great Video. This is exactly what I need. Thank you for sharing
Very helpful video, thanks for posting. Im troubleshooting my reznor garage heater. It turns on runs a few cycles fine then when i come in the morning i can tell it hasn’t ran all night. Trying to figure out if its the transformer or if the circuit board is bad
Common knowledge but! Well done thanks man.
Informative, safety measures clear, clear explanation
Thanks teacher ..I fill more confident on my next transformer test on the next work order I will get I'm maintenance and I will use this info..thanks..
New sub indeed. Great quality content 👍 TY
Nice video, very well explained. You have now one more subscriber.
Excellent video. Just curious, if the thermostat has no common(blue) wire, would it be ok to check voltage between R and Y,or W or G ? Thanks JMT.
Thank you! You can still check between R & any other terminal wired. As long as the thermostat is in the OFF position, between R-Y, R-W & R-G, there will be a 24V reading. This will indicate your transformer is good. You can always also just check the 2 wires leaving the transformer but to save time, this method will work🙃 Thanks for watching! Stay tuned for new videos every week! 🔧
@@JumpermanTech Thanks JMT. Lookin forward to the next one!
👍
thanks bro...I got a bad transformer. 240 going in, yet not showing 12v at the stat. and of course that faint burning smell in the unit by the transformer. Like the transformer in a neighborhood in the sky on the pole, they burn out.
8:24 should it be the darker green instead of the light green wire that you checked in the vid?
Great video. I feel like an expert after listening. He really explains it all so well. Thank you
What is a step down transformer?
Is the transformer in the furnace the source of the "RC" or "RH" power that the Nest Thermostat uses on the wall? Is it possible for the furnace transformer to not send enough power to the thermostat but enough to the furnace?
thanks man ...very thorough
You're very welcome & thanks for watching! Stay tuned for new videos every week 🔧⚡️
I have a bard package unit that is tripping the 3 amp breaker on the low voltage transformer when set to heat. Do you have a video to test that problem?
Thanks this helped me, I got old carrier package....
great video, my transformer has a blue and yellow wire on the low voltage side. the blue has 24v but yellow has no voltage. My unit works fine as far as I know. does that mean I need a new transformer? I have no control board.
Helpful! Thank you! Now I know what sec. Means! Lol I thought it meant section and I was always like wtf and confused myself
Can a bad transformer blow the 3amp fuse in a furnace? Can’t find any frayed wiring
Very well done...Excellent!
Excelente video 💯 great teacher
Thank you. Can you help me how can I recognize the wires if the primary have 440v, 240v and 110v
by using Multimeter? As there are 4 wires Red, White, Black and Brown. And how can I recognize the Common wire?
Clear cut awesome please make a video about PAC and Tr calculation
Thanks to you, I'm learning a lot.
Hello from Mexico
Very good technical video. Thanks
I just moved into a new home and want to instal an ecobee. I went to the transformer and only have 1 segmenet of 24v through the RED secondary, the GREEN secondary is grounded and doesnt have constant 24v. The GREEN wire is connected to my BLUE C wire. the result is that Im not getting constant power to my thermostat C wire. Is this a wiring problem?
Thank you for your Video practical important 👏
Excellent video!! Thank you.
You're very welcome & thank you! Stay tuned for new videos every week🔧⚡️
That's was awesome nice and neat I like the way you take your time to explain things
Thank you! Glad you enjoyed the video. Stay tuned for new videos every week 🔧⚡
Great video. Excellent explanation.
Very well explained - thank you!
Great training video!!
Thank you! Stay tuned for new videos every week🔧⚡️
Great video! Question: my inline fuse from the transformer (blue wire) is blown. The secondary was not producing 24v, so I put a known good transformer in and it blew the fuse again. Could my board have a short in it that is causing this issue?
You have anything on how to hook up a 480 to 120 vac step down transformer? I get that you have your com and your hot but with 480vac there are 3 wires that are hot I get confused when I read your supposed to ground your com. Any help here would be great
for the 24v out what wire is common and what wire is line? Thank you.
Thanks for a great explanation.
Awesome video 👏🏼.
Thank you! Stay tuned for new videos every week🔧⚡️
I like the flow🎉
Thank you! Stay tuned for new videos every week🔧⚡️
THANK YOU, love the knowledge. Keep it up, we will build it up
You're very welcome & thank you! Stay tuned for new videos every week🔧⚡️
So is the white 120 vac and the orange 120 vac for 240 vac input. Or is the white com/ neutral and the orange 240vac?
That was a great explanation.
Dude. Excellent content.
Thank you very much Matt! Stay tuned for new videos every week🔧⚡️
cut the tape on primary side and found a blown fuse ?
twisted the legs together, now have secondary 24 volts .
is it safe to use like this ?
My black and white wire have female connectors, that go straight to the control board, should I stick the leads in them to see if I get the 120 volts?, Will that work?
Great video and explanation
I realize this is about Air. Hopefully someone can help me. Question? I have an overhead Reznor heater. Should there be 24 volts at the thermostat if the system goes into lockout due to a faulty flame sensor. Thanks again For great videos
hello I got carrier AC /furnace now regarding the transformer black wire going/connect to PR1 ? and the white wire to SPEAR 1,2,3 ? (motherboard ) thank u
Great video my guy 👏🏽👏🏽
Hi Jumper Man! Do you chassis ground the 24 v side of the transformer on one lead?
Good video but i have an unusual proble. 240v going in bur ony 5.0 volts coming out. New transformer , same, another new transformer,same. Go to different source for 240v, 24v output now. Any ideas,why?
I thought is recommended to have the inline fuse on the primary lead not the secondary... I'm adding a transformer for my hvac uv lights
Great teacher, thank you!!!!!
this is really great and useful even more so because you made that yourself!! do you sell those? working art✨ thanks JMT🌟
Thank you! I might sell them one day & would take a custom order if the opportunity came up. You're very welcome & stay tuned for new videos every week🔧⚡