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The compressor properly cycles on and off. The condenser fan does not start when the compressor starts. If I spin

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  #1 (permalink)  
Old 07-29-2011, 10:08 AM
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Default Compressor Run Condenser Fan Does Not
Model Number: BX21TW   Brand: Amana   Age: More than 10 years   

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The compressor properly cycles on and off. The condenser fan does not start when the compressor starts. If I spin the condenser fan after the compressor starts, then the condenser fan will continue spinning until the compressor shuts off. This symptom is consistent.

I removed the condenser fan (AP3120994) in order to test its operation. The condenser fan is an 2 watt 115 volt ac motor. When the condenser fan is connected to a power source, the fan starts immediately and continues to run until power is removed. Operation outside the refrigerator seems normal.

The compressor/condenser fan control includes an overload device, PTC relay (AP 2966871) and capacitor (AP 313171e). I assume the PTC relay supports the compressor startup. I am not sure if the capacitor supports the compressor and/or the condenser fan. The circuit diagram refers only to the capacitor (neither start nor run) with the comment "as required on some models".

Is there a way to isolate the problem to the condenser fan or capacitor or should I replace both or have I missed the problem entirely?

Thanks in advance for any help provided, CGParker


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  #2 (permalink)  
Old 07-29-2011, 02:09 PM
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Quote:
Originally Posted by CGParker View Post
The compressor properly cycles on and off. The condenser fan does not start when the compressor starts. If I spin the condenser fan after the compressor starts, then the condenser fan will continue spinning until the compressor shuts off. This symptom is consistent.

I removed the condenser fan (AP3120994) in order to test its operation. The condenser fan is an 2 watt 115 volt ac motor. When the condenser fan is connected to a power source, the fan starts immediately and continues to run until power is removed. Operation outside the refrigerator seems normal.

The compressor/condenser fan control includes an overload device, PTC relay (AP 2966871) and capacitor (AP 313171e). I assume the PTC relay supports the compressor startup. I am not sure if the capacitor supports the compressor and/or the condenser fan. The circuit diagram refers only to the capacitor (neither start nor run) with the comment "as required on some models".

Is there a way to isolate the problem to the condenser fan or capacitor or should I replace both or have I missed the problem entirely?

Thanks in advance for any help provided, CGParker
Cg,

The overload, PTC relay and capacitor support the compressor and it's circuits. The condenser fan motor and the evaporator fan power and the 120 VAC supply to the overload device are a supply from the cold control.

I would have to think, you have a loose or weak connection at the wires to the condenser fan motor, you should check that first. Otherwise the fan motor would be bad.

Good Luck,
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  #3 (permalink)  
Old 08-06-2011, 08:50 PM
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I did some cleaning and checking of the motor and the motor wire connectors. Removed the temporary fan and re-installed the original motor.

Had a momentary panic until the defrost timer allowed the compressor to run (thought I had destroyed the compressor operation).

The original fan is now operating correctly cycling on and off with the compressor. This may only be temporary, so I will monitor the operation for a while to see if it continues to run as it should.

CGParker
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Old 08-08-2011, 06:32 AM
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Quote:
Originally Posted by CGParker View Post
I did some cleaning and checking of the motor and the motor wire connectors. Removed the temporary fan and re-installed the original motor.

Had a momentary panic until the defrost timer allowed the compressor to run (thought I had destroyed the compressor operation).

The original fan is now operating correctly cycling on and off with the compressor. This may only be temporary, so I will monitor the operation for a while to see if it continues to run as it should.

CGParker
CG,

Good Deal,

We'll keep an eye out for your next post, Hope all stays well.

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