Just found this forum, tons of great info! I just bought my first house over the past winter, and lo and behold discovered this spring that my AC Condenser Fan motor has seized up. When I turn on the AC at the thermostat, the Compressor fires up just fine, but the fan motor is locked up.
The Unit is an oldish (no idea how old unfortunately) Ducane unit, and I cannot find any info whatsoever on the motor itself. GE's website no longer lists the model number, so I assume it was discontinued long ago.
I took the motor to the local Grainger branch, and they are currently searching for an OEM part for me. In the meantime, I was able to find an A.O. Smith motor that exactly matches the specs, other then being about half an inch longer. I measured, and that should not effect anything, as I can mount the fan closer to the motor on the shaft. Here is a link to the motor. http://www.grainger.com/Grainger/items/4UY86
Now here is my question. Assuming that I end up purchasing this motor, I need to figure out what to do about the capacitor. On my Unit, there is a single large cylindrical capacitor with 3 poles, and it appears that both the compressor motor and the fan motor are wired in to it. My question is, should I:
A: Wire the new motor into the existing Capacitor. The specs on the old motor nameplate list 5 MFD and 370 volt, the same as the requirements on the new motor. Is it safe to assume the old capacitor will work best?
B: Get the capacitor listed on Grainger's website as a required accessory. It's only $4. I would then wire up the new motor to the new capacitor, and keep the Compressor wired up to the old capacitor. Will that work? Will it damage the compressor somehow by not having the fan motor wired into the same capacitor? Will it even work without the fan motor wired up?
C: Figure out a new multi pole capacitor to wire both motors up to. I don't know which one I would need for this.
Thanks so much for the advice, I really appreciate it.