What a Failed ECM Motor Module Sounds Like | Replacing a Variable Speed Blower Motor
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- Опубликовано: 8 сен 2024
- In this video, I diagnosed a bad ECM blower motor on a Lennox furnace.
This variable-speed blower motor changeout was so stubborn, it took me around 45 mins just to remove the blower wheel from the shaft!
One of the ways to know that you have a bad motor module, is you'll sometimes hear a thumping noise at start-up. These motors are very susceptible to high static pressure due to under-sized ductwork or an oversized system - causing the motor to overheat.
Don't forget, whenever performing this ac repair, make sure to tighten that set screw!
Thanks for watching!
Feel free to use the affiliate links below if you’d like to help support the channel. I make a very small commission if you purchase through the links - Thanks!
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Good job young man and great looking set of tools, a sure sign of a real technician! Just an old dudes prospective not criticizing 33 year in the trade, why not take the blower down and work on it in the driveway or even better your shop/garage or somewhere is most comfortable? I’ll be honest I don’t work on equipment much anymore I have techs that do and I’m on them constantly about how they work. Good workers, good techs and I try to protect their knees and back as much as possible. The idea when possible is to get in and out of uncomfortable situations asap. We work hard as it is let not make it any harder than it has to be. Stay safe
Hey there! Thanks for the feedback. Yeah usually I would just pull the whole housing out of the attic but that day was just so hot and humid outside, plus it was on the second floor attic and I didn't feel like lugging it up and down stairs. Tuffing out those 120° temperatures just seem like the lesser of two evils at the time : )
@@HVACTechKnowledgy yep sometimes you just have to get it done, keep the great videos coming
👍👍 some of them can be stubborn. My saying is “I always win” and so did you.
Yes sir! Thanks for watching!
Your doing really well, keep on keeping on 👍🏿
Will do! Appreciate the feedback and thanks for watching!
Good little blower motor replacement ... Thx ...
Thanks for the feedback!
First time viewer, new comer into the HVAC/R industry. Keep up the good work.
Hey man, thanks for the sub! Wish you the best in the field!
Don't smash on your wheel puller either. The bottom half is aluminum, you will damage it.
What have made is taking and old blower wheel and removed the hub then weld a 1/2” piece of black pipe to it. then put a rod for a tee handle through the pipe. This can then be tightened to the motor shaft to Facilitate twisting the shaft back and forth to loosen it.
Sounds like a good idea. Thanks!
😂sounds just like My Car 😭 for the longest no mechanic could figure out what the heck was going on with it until I found someone who knew what they were doing, I had to order a New ECM 🤦🏽♀️🤷🏽♀️ I know this is not a Car of course but mine sounds just like how it does in this video when trying to start my car that’s crazy 😭
Nice
Great video keep them coming 👍👍
Will do, thanks!
Nice work
Thank you!
I thought I had a bad bearing in my carrier infinity inducer motor, but have determined the the main blower motor is making a intermittent high pitched whine (g#5 note). I "think" it's related to the module, but not sure. Anyone?
You could have left the motor IN PLACE! Only the control module needs replacing. They are available on Amazon and Ebay for about $125. Two screws and then just mounts to end of motor. Cheaper and faster than changing entire motor!
That's true but usually when you're working for a company they're just going to tell you to go and swap out the whole motor cuz it's really hard to tell whether it's the module or the motor itself. I had one just a few months back where the motor was kind of turning slowly which I always thought was a sign of a module failure, I swap the module from a motor on a nearby unit and it still did the same thing. Once I replaced the entire motor it started right up. I say all that to say most of the time it probably won't be worth the time trying to order the specific module because its basically a 50/50 shot weather its the module or motor. Appreciate the advice and thanks for watching!
Wire wheel for the drill. Works better. Ands it’s faster. Motor will drop out. Haven’t used a puller in over 15 years. Mine is still new in the package.
True, yeah i usually use emory cloth which i did on this vid but it just wasnt letting loose. Also the shaft wasnt even rusted or corroded. Thanks for the feedback and thanks for watching!
I have the same exact sound on my motor replaced it and the new one acts exactly the same. I am not getting 24v from speed control wires. Is it the board
More than likely the board, thermostat or harness if you're not getting 24 volts
Not sure how i feel about these motors i’ve had already one go bad in a 2 year old install ..
on my third year with A airquest system I installed myself but I am a ASE master certified mechanic lol but I'm thinking the ECM blower motor might be the week link and keep one for back up
@@davidsmith5766 That’s a hood idea and all but i’m sure as hell not keeping a $600 motor for a spare on every job i do
@@hpjunke my furnace came with a 10 year warranty my buddy HVAC guy gave me one free I figured if original one goes bad I can install used one and get a new one with the warranty Ohio winters can get cold
@@davidsmith5766 Oh yeah it gets hella cold there !
Was that an OEM replacement motor or one of the Greenfield ( if I have the name correct) replacement motor and Ecm module? Must have been a morning job in that attic. Thanks for sharing.
The motors are Evergreen. That is OEM. The Evergreen motors are green.
Yeah its was OEM.
@@BIGBOB-ew9oo Thanks for the correct name.
? My air unit blower went out. I tested the high voltage going to the ecm motor and its fine, I checked the low voltage and its good… I ohm’d out the motor and its fine. I ordered a new ecm and installed it and the motor was working but didnt sound right. Sure enough witching 10 mins the fan stopped working again. Any thoughts on what might be going on?
Just to be clear did you replace the entire motor or just the module?
@@HVACTechKnowledgy just the module
At that point it's very likely going to be the motor
@@HVACTechKnowledgy On the motor connector pins my ohm readings were 12.8 12.9 12.9. OL on all pins when I probed the connector pins to ground.
@@HVACTechKnowledgy i ordered a OEM motor with ecm and will replace hopefully tomorrow Im worried something is shorting out the ECM.
What kind of head lamp is that and is it on Amazon ?
It was a mod I did on the Milwaukee rover flood light. I covered it on this video. Thanks for watching!
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ECM Motor is so noisy! It's like jet engine ramping up and down. 13:15
Lol, yeah never really notice how loud they are. Thanks for watching!
You get a subscribe just for your set of tools alone
Thanks a lot!👍