AC condensor fan runs fine then stops after 60 min when it 'overheats'

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Old 07-10-17, 02:22 PM
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AC condensor fan runs fine then stops after 60 min when it 'overheats'

My AC condenser fan will run for about 60 minutes then stop, as if it overheated. The condenser continues running the whole time, but the air in the house heats up when the fan is not running since the radiator is only passively exchanging heat. If I cool off the condenser/radiator with a garden hose the fan will start again on its own after sitting about 10 minutes. I replaced the capacitor, but nothing changed. It would seem ironic that the fan should overheat when its job is to keep the rest of the unit cool.
 
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Old 07-10-17, 03:49 PM
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If the condenser fan motor is overheating (you would have to feel the motor to tell), then there likely is a shorted winding. You might want to check the capacitor, as that possibly could contribute to the motor overheating. Just be careful with the garden hose. If you spray cold water on a hot object, particularly the compressor, it could crack from thermal stress.
 
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Old 07-10-17, 04:10 PM
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Thanks Bob,

Thanks. I'd be lucky to have water cold enough to crack the compressor
The idea of a short in the winding sounds good, but not sure why heat would play a role and why it would come back once cooled. Thoughts?
 
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Old 07-10-17, 04:19 PM
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The motor is thermally protected from catching fire.
It will reset just sitting there and faster with the cold water.

That motor should be replaced ASAP to keep the stress off the compressor.
 
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Old 07-10-17, 08:17 PM
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Sounds good

Thermal protection makes sense. I will replace asap. Thanks for the help
 
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