r/HVAC•
themulf

Blower is buzzing, not working

Gallery - http://imgur.com/a/DSPlY

About a week or so ago I noticed that my fan / blower was making weird noises. It just sounded off. I also installed a new air filter around that time - http://i.imgur.com/zgdx1oB.jpg.

About a few days ago it started making a loud buzzing sound, and would pretty much just not blow air. This evening as a test I removed the air filter, and it worked! It sounded like normal, and after 20 minutes or so it was back to buzzing, and heater powered down. My assumption was that the new filter was stressing the motor and or capacitor.

Also I am using a nest thermostat. So when I turn on my heat, and set it to 63 deg etc, the inducer starts, then the gas kicks in, then the blower. The blower moans and then the whole thing stops. I'm not a HVAC guy, I have a friend who is, and helped me as far as he could over the phone.

Does this sound like an issue with the capacitor? The motor? Can an air filter thats too "dense" cause the blower cap to break?

Here is video of it buzzing (turn down your volume, it is LOUD) https://www.youtube.com/watch?v=ra5ZKy1i8Oo&feature=youtu.be

Thank you!

Posted Jan 7, 2015, 2:23 AM UTC · edited

211
im_6feet_3inches•

Motors just break man, and you need a new one. It'll run you about 350-500 if you call someone out. If you want to change it out yourself the blower will run you about 100-150. ( that's if the supply house will sell it to you)

3
super_awesome_jr•

Might be able to get to get one off of Amazon, too.

1
im_6feet_3inches•

Guess it isn't that cold aye lol Capacitor should also be changed when replacing a motor

2
super_awesome_jr•

Hey I got Prime! Two days of long johns and sweaters, and I'm set! Of course, I can buy stuff from the supplier's but this guy might not be so lucky.

1
im_6feet_3inches•

There you go man, I'd recommend pulling out the old one tho! so you can compare it to the Amazon one and see horse power, speeds and if the bracket will match/fit.

2
Blast338Service Tech•

Sounds like a start cap. If the motor has a cap. If it does have a cap. Go and get a new one of the same readings. They should be under 10 bucks. If you don't have a start cap then it is most likley a bad motor. I would check for a silver thing with 2 wires sometimes 3 that is attatched to the blower housing.

1
themulfOP•

It has a cap, last two pages of my gallery - http://imgur.com/a/DSPlY

1
Blast338Service Tech•

Get a new cap. 15mf. I would get a 440V.

2
Dehno34Tech•

Sounds like the motor, as others have said. Always replace the cap with a new motor.

Also, ditch the fancy pleated 1" filter and buy the cheap throwaway non pleated ones. The 1" block too much air, and cause unnecessary strain on the blower. They're junk.

1