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JWHeath84 07-03-2014 04:41 PM

Heat Control 10 SEER Condenser Fan Motor Thermal Overload
Iím having a bit of an issue with my Heat Control 10 SEER Condenser fan motor
Replaced the fan motor with the recommended fan motor from the manufacturer Rheem 51-1025-02 and the recommended replacement CAP
The Condenser fan old and new are 3 wire seen a lot of 3 wire to 4-5 wire replacements but not a 3 to 3.
Wired the fan motor same as the motor being replaced, brown to the fan motor on the CAP, Orange to the Common that also has hot lead , and the Black to the L1 terminal.
Situation Fan motor after running 10 Ė 15 minutes gets hot and shuts down due to thermal overload.
Doubled checked the wire diagram and it is how Iíve got the motor wired.
Fan motor spins freely and does not bind.
Any thoughts on what could be wrong and why itís over heating?
Thank you

yuri 07-03-2014 04:50 PM

1) New capacitor is faulty. Need to check the mfd/microfarads

2) Did you put the blade on upside down or higher or lower than on the original. If it is too high or low it may not suck air properly on some brands.

JWHeath84 07-03-2014 04:55 PM


The fan blows up and out pulling air across the coils

I'll try moving the fan on the shaft to see if that resolves the over heating

beenthere 07-03-2014 04:56 PM

Capacitor may be weak.

Bitters 07-03-2014 05:24 PM

Get the blades as close to the housing as you can.

Doc Holliday 07-03-2014 08:39 PM

you certain orange is common? try switching line feeds.

a.man1302 07-06-2014 03:54 AM

double check the wiring diagram and make sure the capacitor is the correct one... It should say on the side of the motor what size of cap is required.

JWHeath84 07-09-2014 11:20 AM

A.Man - Thanks after much back and forth with the Manufacturer, the capacitor they recommended with the condenser fan motor is not correct. The condenser fan motor had listed a Capacitor 3 MDF 370 volt, the recommended capacitor purchased was a 45/7.5 370 Volt.

Not an Expert, but I'm guessing that this is not correct for the new fan motor.

The Condenser compressor needs the 45/7.5 370, so would a second capacitor jumped from the first be required?

Bitters 07-09-2014 12:30 PM

I would leave the 45/7.5 cap in there and go by a 3 MFD cap. Then remove the cap wires coming from the motor and put them on the 3 cap.

a.man1302 07-09-2014 11:13 PM

Wow, no wonder the motor was overheating... Leave the larger capacitor in for the compressor...connect a wire from the "C" terminal of the larger capacitor to one end of the smaller 3mfd capacitor, and the fan wire goes connected to the other end of the smaller 3mfd capacitor.

a.man1302 07-09-2014 11:14 PM

Hopefully the 7.5 MFD capacitor did not damage your new motor

JWHeath84 07-11-2014 06:40 AM

Thank you all for your help on this, heading to Granger today to PU a 3MFD 370 Volt Capacitor

I'll let you know how it turns out

JWHeath84 07-15-2014 07:06 AM

I want to thank all of those who responded and help figure the error of the manufacturer out. Added a second run capacitor to the unit a 3MFD 370Volt, plugged in a jumper from L1 red hot to the capacitor, the brown start wire from the motor, and the Orange Hot lead to the terminal the jumper is connected to and wouldn't you know the motor runs fine, no issues has not gone to thermal overload.


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