I spent $0.12 and replaced the mounting bushings to make mine quiet. Carriers inducer is known to sag and cause the inducer wheel to rub on the housing.
this post was submitted on 01 Jan 2025
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Ooooo - tell me more!
https://www.shareddocs.com/hvac/docs/1009/Public/03/58D-9SI.pdf
The grommet in the photo. The weight of the motor and vibrations cause the grommet to get weak which allows the motor to drop slightly which causes the blower wheel to rub slightly on the housing.
Does not apply to all models obviously.
So is that just "replace this bushing when it wears out prematurely instead of getting the updated mounting kit"?
That's all I did yes. I was able to prove it was the grommet by gently lifting the motor up which resulted in the squeezing going away.
Short term fix while I waited for delivery, was I swapped the lower and upper grommet as the lower one was my issue part while the upper was still good.
It's been working without noise issues since last winter.
This all is too exciting for Dull Men's Club.
Sorry, I shall tone it down.
Turns out mine was the motor. Already has the updated mounting orientation, looks like it was built that way. As you know, it's a pretty easy job. I spent more time looking for an Allen key and then trying to extract that Allen key from the set screw for the squirrel cage than anything else.
What's our take on bearings for these?
Sleeve bearings are quiet for 2 or 3 years, but toast after 5
Ball bearings are a bit louder but last 10 years
If I were designing it, I would use needle bearings.
Just had a repair tech replace mine. Hoping it was replaced with a quality part and lasts longer than a couple of years.
Ours started screaming about a month after we moved in. Repair tech wanted something like $700. I mentioned it to a friend and he was aghast. "It's a $100 part!" I found a match on Grainger for like $120 and installed it in about a half hour. Five years later, nary a peep.
That was about how much they wanted to repair it the first time around, too. Guy advised me to get the whole assembly with the mounting bracket and squirrel cage, because while you can get just the motor, trying to replace only the motor is a huge pain.
Even with this second replacement cost, I'm still $400 in the black.