Causes for blown AC motor

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  #1  
Old 06-22-11, 02:57 PM
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A/C fixed but blower question now

Having a repeated problem with my A/C unit outside. I get a hum but the fan doesn't spin.

It seems this was the problem I had a few years back and replaced the motor (new one is a Fasco D7909) and all was great in the world.

Couple quick things I've checked:

Contactor is not pulling in when turned on. When I manually pushing it in I get the humming noise and no fan.

Capacitor looks fine, no bulges etc.

I spun the fan blades manually and they move freely.

If this is a bad motor again what would cause me to have to replace the motor on an A/C unit this is only 10.5 years old??

**Update**

Ok I took the capacitor off and it was definitely bad. Bulge in the back I couldn't see before. Just got back and replaced it.

A/C is up and running like a champ!

BUT

In the house the cool air is coming in but not as hard as it should be. What should I look for at the blower? The house filter is good, replaced it about 2 weeks ago.
 

Last edited by Ca_Ghost; 06-22-11 at 05:28 PM.
  #2  
Old 06-22-11, 06:42 PM
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check the evap coil to see if it is plugged up or if the blower wheel is dirty.
 
  #3  
Old 06-22-11, 07:20 PM
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I have never really looked at the blower before. Is it difficult to check the evap coil?
 
  #4  
Old 06-22-11, 07:33 PM
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it can be difficult..... Most homeowners have pros clean them when necessary, but dont know if it needs cleaned..............
 
  #5  
Old 06-22-11, 09:39 PM
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I went up in the attic to look at the evap coil but I didn't see where to actually get to them. The few places I thought to look the seams are sealed with metal tape and a bondo type material. I'll head up then in a few and take a quick picture and post the setup.
 
  #6  
Old 06-22-11, 10:07 PM
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Ok nevermind have to learn how to post pictures first lol
 

Last edited by Ca_Ghost; 06-22-11 at 10:52 PM.
  #7  
Old 06-23-11, 04:45 AM
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