Step by Step Procedure for Troubleshooting a Blower Motor from a Furnace and AC System!

Diagnosing a 120v furnace blower motor using a multi-meter, checking resistance values, and showing speed tap colors. You can verify what speed a color wire is using the resistance shown on your multi-meter. Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.

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[GeorgeLecakes]

Trying to diagnose my blower right now. Your video was very helpful in giving me some basic guidance on testing and how to proceed. Thank you.

[MrSami]

Trying to diagnose my blower right now. Your video was very helpful in giving me some basic guidance. THANK YOU!

[gabrealreece]

Straight to the point no gimmicks Safety First this solved answers of Google's 4 days not to mention calling companies for free advice

[DrunknOdin]

Great Video. Recently purchased blower motor and capacitor to install myself because I did not know how to test! You covered it all. Apparently it is just my capacitor that went bad but the motor had a funny burned smell. Debating if I should uninstall the new and return. Repair Clinic is the best. Thanks again acservicetech.

[nwmike]

Thanks for this video! I have a 2002 Bryant Plus 90T furnace that was igniting but then shortly thereafter shutting off, and giving me a code 13. I suspected there may be something wrong with the blower motor as it seemed to run at much slower than normal speed when I switched to fan only at the thermostat. I use this function a lot during the summer months to circulate air in the house so I know how fast it usually runs. After other troubleshooting suggestions were followed, my problem was a faulty motor run capacitor, found thanks to this video. I was able to find a matching replacement at Grainger for $5. Cheap fix! Furnace is now operating properly.

[GreyRockOne]

Thank you, very informative info here. I don't have any problems yet, just browsing to update my (mental) knowledge database! I'm electronically, electrically and mechanically inclined and the type who will attempt anything, but I know my limits. I did subscribe to your channel, so I have lots of watching to do! Thank you!

[MervsServiceSecrets]

Your videos are incredible. I recently had an HVAC house call because the 115v wires in my air handler's juction box had fried out. The technician reconnected the wires and the air handler fan worked again! Yay! I figured I must have had an energy surge from a lightning strike in the area, but when he tested the AMP draw from the motor he quickly shut off the unit and said "WHOA! That's drawing nearly 7 AMPS! You need a new blower motor! This is unsafe!" Later, I noticed the sticker on the motor says 9.35 AMP! !! Plus, the fan spins smoothly and freely. Is he just trying to sell me a new blower motor? Or is that truly an alarming AMP draw?

[frankmontez]

Completely took mine out because parts place told me tey had one that fit but didn't . It was universal but cheap $75 and in stock so i decided to try . Unfortunately not, holes and bracket didn't ssem to align . Been verry hot today in south Tx . Five days without AC

[shonuffisthemaster]

verry helpfull and straightforward video, thank you. i was actually trying to figure out what wire did what on a used blower im using for a different application (shop ventilation) so the simple test was verry helpfull

[frankzito]

All things seem to point to my capacitor. I’m eagerly waiting for it to arrive today lol thank you my dear fello

[Marc_B.]

Pretty sure my motor is bad even though I'm getting the various ohms for each speed. Another YouTuber confirmed that you can have good readings, but still have a bad motor. We smelled some odd burning smell a few months ago, so I think for some reason the motor overheated. The fan blades spin quietly and smoothly by hand, and there's no play in the bearing. It works now for 5 minutes, but then the motor shuts off. Any thoughts?

[romarues]

You make it simple.
Thanks alot for all of your videos, very helpful.
I can't wait to see your next new video.

[felipeballi]

I show these to my guys all the time great videos.
thanks

[toddbehrends]

Great video. It refreshed my memory from class. I will visit this site again if I have any questions. Keep up the good work. I am just starting out in the field of HVAC and hope to work for a company soon. Again good video. I am currently changing out a blower motor in my son's unit. The motor would start but soon quit. There is some play in the shaft. I am thinking that the bearings are bad. I am going to replace the motor.

[dustinderrick]

Getting no fan after some condensate build up caused an error code. Cleaned out the tubing and cleared the error codes. No fan and no voltage at the terminals when I tried heat mode. Bad board? Gave pressure sensor error in heat mode. AC mode gave (20, 26, 59) twinning error, reverse neutral, and condensate errors. Wiring never changed and it’s a newer system that has been running for four years. Outside unit works fine. Any help is appreciated, thanks for the informative videos!

[MasonNesson]

Whenever an OEM Chinese made motor ( Zhongshen motor ) like this goes I then put a GE or an Emerson with a separate four brackets belly band ! I had one motor like this that kept pushing its stator and shaft right through the plastic end cap that is on the bottom of the shaft/ motor for its application ( horizontal To the right install up in the attic ) not once but twice in 3 years !!! Put in an Emerson 3/4 HP and that was the end of the problem !
Thanks for the post

[craigwflys]

I have an old blower motor and capacitor. After the AC has been running for a good 90 minutes the motors rpm slows down about 50%. Shut things down a bit and rpms pick back up to normal. Think it could be a failing run capacitor?

[nazarettos]

I installed new motor and everything connected properly, but my furnace blower motor runs slow and my heater turns of after 15 minutes or so. Capacitor is new as Need help

[tproc]

Hello, great content! Had a question when troubleshooting (a non functioned blower/wont turn on)...When using the multimeter, can I take blower out/disconnect? With my horizontal Trane, I cannot access anything. Plus very hot up in attic. I removed to clean it, but looks in good shape (GE blower) already tried replacing capacitors and cleaned the outside unit coils and filter. Thanks!