The E-Book, Paperback and Quick Cards: www.acservicetech.com/store The Paperback, Quick Cards at Amazon: www.amazon.com/shop/acservicetech Support the Channel- www.patreon.com/acservicetech Tool List- www.amazon.com/shop/acservicetech Related Videos: Furnace Control Board, IFC Troubleshooting: kzread.info/dash/bejne/opynt7uxn5qbmrg.html How the Heat Pump Defrost Board Works: kzread.info/dash/bejne/e3unqcaIg7jefbg.html Top 12 Problems When Wiring a Thermostat: kzread.info/dash/bejne/onp6k6WjYrnUdLQ.html Top 10 Thermostat Related Problems: kzread.info/dash/bejne/l4lq0ad8qZaTmJs.html Thermostat Wiring to a Furnace and AC Unit: kzread.info/dash/bejne/eaOIyqOlf9m5pNY.html 10 Most Common Thermostat Wiring Diagrams: kzread.info/dash/bejne/mmZoj9Bym9zdYNo.html Dual Fuel Thermostat Wiring: kzread.info/dash/bejne/epycx9WjeJyoh6w.html Furnace & AC Thermostat Wiring: kzread.info/dash/bejne/Z6CsyNaDmbfXfMo.html Bypass the Tstat for Testing: kzread.info/dash/bejne/fG2W2q6petO4fqg.html Heat Pump Thermostat Wiring: kzread.info/dash/bejne/pppmsdp8dNrSdrw.html Tools I Use Are Linked Below! 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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

Thank you so much bro.God bless you always

Your videos are addicting. The more you teach me, the more I enjoy it, and then I want to learn more.

@acservicetechchannel

3 жыл бұрын

Thats awesome to hear!

This is one of the best videos I was really waiting for. Appreciate appreciate. More technical and much needed.

@acservicetechchannel

4 жыл бұрын

Thanks a lot and glad to do it!

Greatly done, enjoyed the video!

People think residential is basic, no you learn fundamentals Thanks for the vids Craig

@rhoodj

3 жыл бұрын

I think I have a bad relay on my Condenser fan citcuit board. When the fan stops spinning when I touch the circuit board the fan starts and I can hear the cranking noise stop/start on one of those black relays. How to replace this circuit board? Any help please?

Your the man!!

Excellent video.Thank you!

@acservicetechchannel

4 жыл бұрын

Thanks Paul!

Another good video craig. Thanks for sharing your knowledge.

@acservicetechchannel

4 жыл бұрын

Glad to help Brad!

Good morning Craig! I need to catch up on your videos as I've missed a few. Great info sir as always!

@acservicetechchannel

4 жыл бұрын

Thanks a lot Tom! I appreciate you and let me know if you have any questions!

Great demonstration on this video,Craig.. Very informative and useful to diagnose a air handler circuit board.! Thank you for your time and all your efforr you put into these videos! Bryan Tyler Refrigeration

@acservicetechchannel

4 жыл бұрын

Thank you for your support and watching the videos!!

Your videos are the best!

@acservicetechchannel

4 жыл бұрын

Thanks a lot Familia Sanchez HVAC! Nice to hear from you!!!

great teaching.

@acservicetechchannel

4 жыл бұрын

Thanks a lot N Davis!

Nice troubleshooting sir 👍

@acservicetechchannel

4 жыл бұрын

Thanks a lot Trick!

Best hvac channel

Another good 1 Craig ...

@acservicetechchannel

4 жыл бұрын

Thanks a lot Eddy!

Excellent video.

@acservicetechchannel

3 жыл бұрын

Thanks Rick!

Good content

Great video. Happy Weekend ^_^

@acservicetechchannel

4 жыл бұрын

Thank you very much ZE KENZY. It was productive!

Love your videos, but for the lay person, to cut power then disconnect the wires from the relay, then turn on the power again with wires to relay disconnected, would like to see you jump the red and green wire from the inside of the wire covers at terminal? is that what would be done. Really good video and I do thank you

Good Stuff!

@acservicetechchannel

4 жыл бұрын

Thanks Gerry!

Thank you sir you are the best thing since slice bread 🍞

@acservicetechchannel

4 жыл бұрын

Ha ha, thanks and glad to help!

Thanks

It couldn’t be much clearer. Your breakdown are in 4K. Nice

@acservicetechchannel

4 жыл бұрын

Thanks a lot Up and Coming HVAC Johnnie!

Thanks!

@acservicetechchannel

4 жыл бұрын

Thanks!

I believe the delay turning off is from those capacitors once they drain.

Thanks!!!!!!!

@acservicetechchannel

4 жыл бұрын

Glad to help!

Question: on one video you said you made the transformer tester the one in this video. I understand all you have done here, testing the relay that operates the blower motor, but is the tester so that you can totally cut the power in the airhandler to make it safe with low voltage? thanking you in advance

Good

Craig what is the purpose of the time delays for turning on & off the fan?

Great video Craig. So this the type of board you would encounter on a straight cooling A/H as opposed to the board on a furnace?

@acservicetechchannel

4 жыл бұрын

Yes, newer furnaces have an IFC which is an Integrated Furnace Control board. That controls ignition and the blower. The board in the video can also be referred to as an EFT, Electronic Fan Timer, thanks!

Thank you very much for your video. I don't have a control-board, but I do have solid-stat time-delay. My ac system keeps running and cannot be turned off. I replaced a new time-delay, but it has the same problem. What caused the problem, please, help.?

Will this cause my compressor to shut off? I've got a heat pump that I'm trying to get working again. Lightning cooked the defrost board, contactor, transformer and condenser fan motor. The compressor is giving a good resistance value

Any videos on troubleshooting rooftop units? I really like the way you explain. Thanks

@acservicetechchannel

4 жыл бұрын

Thank you for letting me know what you would like to see!

@craigewing1844

4 жыл бұрын

I would like to thank you for all your help in making these videos! You have help me tremendously! I also would like to see some troubleshooting on some RTU units up to 25 tons. Thanks!!

Summary: Pls tell me if I'm wrong. 1. shut pwr off at air handler. 2. remove wires to relay and tape them away from board and each other. 3. test C and NO to see if no resistance same with C and NC for resistance. 4. Run a jumper wire from R to G test for resistance and level at said terminals. 5. is the relay good and operating as designed. Did I miss anything?

Hi. I have a control board that doesn't have a fuse. Can you do a video on how to add an inline fuse to protect the control board. I am sick of replacing these boards which are getting very expensive. Thank you.

I have an air handler in which the fan runs when the ac is When the heat setting is on the fan doesn’t work on auto or When I go to the cool setting the fan comes right on as

I'm assuming that the relay can be changed if it does not pass. What type be of problem would be encountered that would point to the board/ relay?

@acservicetechchannel

4 жыл бұрын

That relay is actually soldered to the board so you would replace that one. It is not a plug in type. If the blower runs all the time or the blower does not come on at all, thanks!

Very good video in fault finding etc. Unfortunately we seem to live in a more disposable environment today where HVAC techs just willingly throw away & order a new PCB, which in turn kills skills you easily forget. In my apprenticeship 20 years ago I remember being taught to sit & fault find. Now it’s just a rip everything out and replace society as parts are so cheap, which is good in it saves you time, but you quickly lose your knowledge.

Thanks, but I would like to have seen where the control board was and how to get at it

@hammerbeard3357

2 жыл бұрын

Yeah videos like this are great but working on a table and in a unit are vastly different.

My particular board doesn’t turn off. In other words once it gets energized the time delay for off function does not occur. I could probably fix the board but I don’t have a schematic. It was like $18 shipped. My guess it’s the IC chip.

Can someone explain me why the air handler need a time delay ? it is because you dont want your motor fan doing On and Off constantly ? and not because you want to extract all of the heated air in your duct

what is the name of the motherboard, and can you send me a diagram of the connection to the thermostat I would appreciate it!

I can't locate a control bd or a fuse on my furnace.

How much is the cost of The control board?

@HsingSun

2 жыл бұрын

I have not seen he could answer any question as I expected. He may give your the part number, the price would depend on the model.