I have read some posts similar to what I'm posting, but the one that I found that was almost exactly the same to my predicament was solved when the guy replaced the capacitor and not the compressor fan motor.
My compressor fan motor is bad on my outside unit, the seals dry rotted and the grease or oil is all gone. It is on/in a Miller/Nordyne split unit. The old motor is a GE 5KCP39FF, 1/4 HP, 825 RPM, 208-230 V. Needless to say, I couldn't find an exact replacement for the almost 20 year old air conditioning unit.
I found and have ordered the closest replacement motor that I could and it is a GE 5KCP39JFBA835, 1/4 HP, 825 RPM, 208-230 V. Grainger has these for $157, but I found a new one for $80, shipping included.
The old motor has only 3 wires and the new motor looks to have more from the picture, as I haven't actually received it yet. Also, the new motor calls for a different run capacitor then what is currently on my outside unit.
The capacitor on it now is a 35+5 mfd X 440 VAC, 3 head/prong, which I replaced new, just a couple of months ago. I guess it is a dual run capacitor as it runs the fan and compressor.
Although I'm fairy sure the new motor will work and is compatible as a replacement, I have concerns in regards to the wiring and the capacitor.
At Grainger's website, they state that this particular motor requires a 7.5 mfd 370 VAC run capacitor. I looked at the picture of it and it has only 2 prongs on top.
So, obviously, I need some help with knowing how to correctly wire the new motor and advice concerning the capacitor.
The old motor has ROT_CAP 5.00/370 on the sticker.
I'm not sure about the sticker on the new motor as I haven't got it yet and I haven't been able to find a good picture of the sticker to read that info.
Here is a link to the motor at Granger's site: hxxp://www.grainger.com/Grainger/GENERAL-ELECTRIC-Condenser-Fan-Motor-2PRA6?Pid=search
Will I need to order the capacitor that Grainger recommends, or do I need to find a dual run capacitor that has the same specs as the one they recommend? Will the new capacitor work with the compressor and fan?
All help and advice will be appreciated!