Question about Intertherm P3RA-048K Air Conditioner

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Fan cuts on and off repeatedly when heater is on

I have no problems when the ac is on cool, but when it's on heat, the fan cuts on and off repeatedly. This started about 4 days ago. I've changed the thermostat wjth no improvement.

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  • Anonymous Jan 30, 2009

    Fan cuts on and off repeatedly when heater is on problem, and notify you when a new solution is offered.

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Either the circuit board or the relay that controls the fan in heating is dropping the fan out. it probably uses a different blower speed for cooling than for heating.. you'll need a meter to check if it is losing power.

Please rate this it matters to fixya.

Posted on Jan 16, 2009

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the fan when switch to auto will run as the heater or ac is running and when in the "on " position, it will always run.

there is a problem in the connection of the cool or heat contact to the fan relay that is why it is not running if you place it on auto.

trace the diagram of the thermostat and you would know where the problem is...

i hope i ws able to solve ur problem..

pls rate me

tnx 4 using fixya..

drcool




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