Causes for blown AC motor
#1
06-22-11, 02:57 PM
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.
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.
#4
06-22-11, 07:33 PM
Member
it can be difficult..... Most homeowners have pros clean them when necessary, but dont know if it needs cleaned..............
#5
06-22-11, 09:39 PM
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.
#7
06-23-11, 04:45 AM
Member
