Attempt to fix noisy AC


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Old 07-16-20, 01:01 PM
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Attempt to fix noisy AC

Hello everyone, thanks in advance for taking the time to help a "noob"

As the title says, my AC unit started making noises and vibrations!


The unit I'm talking about


The brand and specs


I've investigated a bit and I think it's the fan that has drifted out of place and is scraping against the bottom; Which makes sense given what the noise sounds like, and how it changes with the fan speed, etc.


Those are the blades of the fan, and the area where it seems to scrap. Sorry for the mold!





Left side, attached firmly

Right side, attached a bit loosely

Okay good start! But now I'm unsure on how to proceed further...

I don't see any visible screws I could tighten or anything. Or an easy way to remove more of that plastic cover either.

The problem seems so dumb and straightforward! Surely there must be a way to fix it myself?

Thanks!
 
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Old 07-16-20, 05:50 PM
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Look inside the fan's cage (the part with lots of "fins" that turns) where it attaches to the shaft. Often there is a set screw or two that locks the cage in place. If they work loose the cage can work out of position and rub.
 
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Old 07-16-20, 09:49 PM
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Sorry for the mold!
We're not breathing it in...... you are.

Can't find a service manual to help you out.
That unit does have a five years parts and labor warranty if that helps.

Split units like that use very long squirrel cage blower wheels that put a lot of stress on the motor bearings. If that unit has a lot of use on it..... you may need a new blower motor.
 
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Old 07-17-20, 07:27 AM
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Look inside the fan's cage (the part with lots of "fins" that turns) where it attaches to the shaft.
I want to, but that's where I feel stuck, I don't see a way to probe further inside, and go below this "blue" part. Can it come off somehow?


 
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Old 07-17-20, 08:58 AM
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Your third photo with the red circle shows where you should look for the set screws that attach the cage/fan. It will probably require at least some disassembly to be able to access the area.
 
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Old 07-17-20, 11:14 AM
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Thanks for your help Pilot Dane :-)
I don't see a way to disassemble further, unfortunately... I guess the access points are at the back and it would need to come off the wall first
 
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Old 07-17-20, 11:20 AM
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It won't come off the wall..... the refrigerant lines are holding it in place.
Usually the cases are removable.
 
 

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