ECM Fan Motor Won't Turn On or Won't Shut Off on HVAC Unit! Testing the Board and Fan Motor!

I've literally diagnosed three bad ecm motors this past week! All three of the customers said they were running their furnaces on a generator (generac).

Another great video, Craig! I appreciate what you do for this community!

You know it’s going be a great day when you have a new video and a cup of coffee for breakfast.

I see r and c connect not g

I always follow you, your videos are better than school and work place

the best

Another banger. 🤘⚡️🤘✨✨✨

Awesome video 🙏 thank you so much 👍

As always I like your videos every day I work as residential PM technician and these videos are great resource to refresh my knowledge. Again as always your one the top technician and teacher…

Fantastic go video. As a Instructor,you always give me great ideas

Great video, well explained, good camera quality and clear voice. Thanks always Craig, you teach and explain great.

It's my job 🔧❄️There is no magic in it

Six years ago my Rheem air handler ecm fan motor stopped working. I determined the ecm fan module went bad - I assume it was from a voltage surge from a storm around that time. I was able to locate and purchase a new GE gentec module on eBay for $250 (the dealer flashed/programmed the replacement module for my specific system application). I did not purchase a new complete GE gentec ecm motor assy as at that time it was $700. The air handler fan motor w/the replacement fan control module is still working fine to this day. Properly diagnosing the module as the issue for fan not working was very difficult as all I had to go on was the wiring diagrams located on the air handler. At that time I didn't even know that an ecm fan assy that uses DC power to operate the fan motor was a thing. Had I had this video back then as an explanation of system operation it'd of saved me several hours of troubleshooting. Back then I couldn't find any info online on how the ecm fan motors worked or their elec/system diagnosis procedures.

great information tech 🔥

Excellent!
What would you do if you lost the programming on the red wire?

Thanks again for all the content,editing,nd post s you create for us guys in the field .
You are sooo correct the price of just the module is nuts , better to buy the whole assembly

Thanks again Craig 👍Great work your like the MVT (Most Valuable Technician) of the Trade 😎

Great video. Very helpful

Hi so about the fonction of test in this board how it works or runs ?
Thank you for All

Great video Craig. I bought your book on Mini-Splits. It’s been a huge help to me. Thanks for the knowledge

When troubleshooting an ecm motor I like to also use the supco ecm tester as insurance.

Excelent. Enjoying your books

I know you have the heart of a teacher, but you should CHARGE for all this knowledge. Case in point... you saved my son at least $300 plus in labor. He calls me up... 8 year old Bryant heat pump. Blower with an X13 would run all the time. Using one of your videos... I pulled the thermostat and it still ran. Checked G to C no voltage. Pulled the fan speed wires on the X13... still ran. Bad module. Replaced it with the Rescue Ez13 because it had both pigtails. All is well. i charged him a 12 pack of beer. 😁

I was struggling to understand how te controls work. Then I did a plc training (aka siemens logo programming 😅) and now I understand all electronic boards are basically logos without the coverage, with the difference that they are already programmed

Helpful video!

If it’s an air handler here in the Pacific Northwest then you might see 256 volts at the blower in one neighborhood and 207 volts at a residential home a couple of blocks away… Ya our power grid is screwed up here

Excellent video, I recommend your videos to any of my friends who are interested in learning controls. It amazes me how how thorough your training is. I have gone to training that cost money that were not as good as your videos.

Very niece sir ji ❤❤❤🇮🇳

Like craig Said. Fails at the Module. not the motor I know This for sure. Because I've Fixed.six ECM motor instead of replacing the module or the motor itself. On the high voltage side of the module There is a component on the board that is called a rush current limiter. This component, after a period of a few years blows a leg off the board. Due to heating of the component. $3 part from Melzer electronics out a Texas and you're up and running again. The latest one that I Fixed. Was Six years old and The rush current limiter blow a leg off the one side of the Component.. replaced with new one And still going 4 years now.

I loved the Video and explanation!

Question: I have 5 York units and I have Unit #2 switches from Cooling to fan only right after 5 minutes of running. Do you think that has to do with the module Program failure? Thanks

Thank you Craig, my question is if thermostat power up the G terminal when there is a call for heat, what speed fan would run and same question if there is a call for cool

So confused

This ecm motor/module easily breaks as compared to older systems psc system..

sharing video to facebook.

Boa Noite estes modelos de placa são padrões pra todas as centrais ou cada uma tem seu modelo? Parabéns pelos vídeos sou daqui do Brasil acompanho seus videos

Thank you for sharing your knowledge. I have a question, maybe a silly question. Does the board has a relay to turn on the gas valve?

This was perfect explanation and visual for new techs. Wish all videos was like that.

I found this exact board and motor to be problematic. At least for me I’m constantly replacing either or in some cases both because of the blower taps not energizing or the motor not kicking on when being energized by the taps. Anyone else having this issue?

Amazing!
I use fan for just fan.
I use cooling with automatic, so indoor blower motor comes on according to the temperature and compressor and outside fan motor come on also!

My education was from your home state where I graduated from Middlesex County College in 1985 with an ASET Degree
And DeVry University in Woodbridge, NJ with a Digital Electronics Certification.
Professor Lee was my Digital Professor at DeVry!
Thank you very much!

Have a EMC motor and a IFC furnace, replaced my emc motor with same emc motor specs it with a refurbished one! When we connected it just turns on continuously, disconnected thermostat wires, stays on. When we turn heat or ac goes thru process and turns on. If I turn fan on it stays running but at lower speed, when I shut fan off it stays running but faster speed. Thoughts

Great!

Can you recommend a good surge protector for the type of ECM blower motor troubleshooted in this video?

Like always, thank you for sharing the knowledge. All your videos are always so helpful!

Thanks for the video. Could you explain how we could substitute an ecm motor for one with a capacitor? Thank you in advance

You mentioned DC relays on the IFC board but measuring AC output from the motor speed taps. What part of the relay is DC?