Question about Dometic Rooftop RV Air Conditioner

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Compressor starts and doesn't stop

Compressor starts immediately after breaker is turned on regardless of temperature setting. Turn thermostat down and fan comes on and cools until satisfied and shuts off, but compressor continues to run and will stop after approximately 4-5 mintes and start again for approximately 5 minutes and start again without fan. Thermostat seems to control fan, but compressor will run regardless except, if fan is off compressor may be shutting off for high head pressure?

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  • Pairman Jun 02, 2008

    Thanks! You were right on! The relay was solid stat and the board had to be replced, but that was the problem. I changed the relay board and teh air orks fine, thanks again!

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  • Master
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Relay for the compressor may be stuck ( Contacts welded) both the fan and the compressor should operate at the same time. Have the relay(s) checked and possibly replaced.

Posted on May 31, 2008

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