Carrier A/C blower motor noise issue?

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Old 07-23-16, 06:01 AM
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Carrier A/C blower motor noise issue?

Gas Furance WeatherMaker 8000 Two-Speed
A/C WeatherMaker-38TXA

Replaced Blow Motor April 2013 with OEM GE motor.
Problem is the blower motor area Im getting a rattle noise? Only does it with a/c is on? If I use the heat its fine. If I take out the filter 3m 16x25x1 filtrete 1900 the noise goes away? I checked the Squirrel cage fins they seem fine. Went over every bolt to see any loose ones no? Any Ideas? Need Help!

Thank you
Ken


https://www.youtube.com/watch?v=eBPh6VZY4UQ
 
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Old 07-23-16, 07:28 AM
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Did this start recently? When you switch to cooling the motor runs a a higher speed. Maybe your filter is to restrictive.
 
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Old 07-23-16, 09:34 AM
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Welcome to the forums.

That's not a rattle. That is the distinct sound of a rubbing/worn/dry bearing.
If it's a belt driven blower then it can be the motor again or the blower bearings.

Can't tell for sure what your furnace uses without a full model number.
 
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Old 07-23-16, 09:40 AM
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Its started last Aug. 2015, but the noise started very faint then louder.....I changed to the red 3m filter. The blower door seems to be the problem. On the bottom of the unit where the door meets I see some padded tape(see pic). I know Im chasing a Gremlein!! I just want to rule out blower motor, sq cage... Yes its the higher speed which is when a/c is on. Its cavating. Thats the best I can explain....Would the filter cause this restrictive air flow etc...

My thoughts are:

1. Filter is causing air restrictive then cavating
2. The padded foam is worn out



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Old 07-23-16, 09:44 AM
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58TUA120---1--20 Furance Carrier
 
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Old 07-23-16, 09:47 AM
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That foam tape is for the air seal.

In the video I don't hear any rattle. I hear a continuous even grinding sound.
 
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Old 07-23-16, 10:07 AM
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When I replaced the blower motor 2013, I did have bad bearings whining sound....Today this sound is a hard sound to describe... I checked for rubbing no dice....
 
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Old 07-28-16, 03:15 PM
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could it been the wheel cage?? any tips see find out if wheel cage.... The sound doesnt happen when I put the heat on....
 
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Old 07-29-16, 09:53 AM
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Thumbs up Update: Fix

It was the squirrel cage....
 
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Old 07-30-16, 07:02 AM
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When you press on fin, makes a click click, must of came apart.... Wonder if they can be repaired? On see a date on cage from Aug. 2001....




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Old 07-30-16, 07:11 AM
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If the "fin" came unattached from the center support, try mixing up some epoxy and try to "glue" it back to the center support. This should help prevent the fin from flexing and making the clicking noise. Alternatively, if there is a crack in the fin (can't tell from picture), coat the area with some epoxy to repair the crack.
 
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