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Old 08-08-2011, 12:00 PM   #1
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heat pump system is heating when on cool setting every 3-4 days????


Can anyone tell me why we get hot air ( the heat strip comes on ) every 2-4 days when the air conditioner is running?
The outside unit is running and the heat strip is running. I can shut it off at the thermostate and turn it back to cool after 15 minute and it works Ok for 2-4 days.
I installed a new thermostrste but it still malfunctions. The system is 3 years old.

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Old 08-08-2011, 06:16 PM   #2
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heat pump system is heating when on cool setting every 3-4 days????


sounds like you may have a outdoor thermostat on the system that is malfunctioning or you have short in the low voltage wiring somewhere.

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tommy56 (08-09-2011)
Old 08-08-2011, 07:46 PM   #3
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heat pump system is heating when on cool setting every 3-4 days????


What is the:

Make and model number on the outdoor unit?

Make and model of the thermostat?

Rough explanation of low voltage wiring, can you map it out for us?
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Old 08-08-2011, 10:04 PM   #4
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heat pump system is heating when on cool setting every 3-4 days????


Could be a faulty defrost board. Disconnect the wire on the E and W2 terminals of thermostat. And the defrost em heat wire on the defrost control on the outdoor unit. Give us a model/manufacturer of system.
If you disconnect these wires and the heat still comes on then its time to call the a/c guy to chase down the shorted wire.
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Old 08-09-2011, 08:24 AM   #5
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heat pump system is heating when on cool setting every 3-4 days????


Quote:
Originally Posted by zootjeff View Post
What is the:

Make and model number on the outdoor unit?

Make and model of the thermostat?

Rough explanation of low voltage wiring, can you map it out for us?

Outdoor unit Goodman Model No. GSH130481AD

Thermostat Lux Pro Model No PSH521L
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