Question about Dometic Rooftop RV Air Conditioner

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Duo therm roof top a/c

Compressor comes on fan will not. I replaced the fan motor,it worked fine once on the test run. put it all back together tried it again, compressor comes on fan will not. Tried spinning while power was on nothing?

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  • skintknuckle Jun 02, 2008

    motor will not run when you turn it to fan. I tried spinning it will power was on it felt like some of the coils where on and some where not, motor felt like it was sticking in one spot. With power off it spins freely.

  • skintknuckle Jun 02, 2008

    motor will not run when you turn it to fan. I tried spinning it will power was on it felt like some of the coils where on and some where not, motor felt like it was sticking in one spot. With power off it spins freely.

  • Anonymous Jun 16, 2008

    the commpressor runs fan will not.replaced fan motor and run capacitor still will not run.I can hear relay click on hi position only.

  • depdawg Jun 28, 2008

    Compressor runs and fan does not. Replaced capacitor and still had problem. Checked voltage through relay board and there is 115 vac coming from both hi and lo outputs from board at the same time. Is this correct?

    all fuses good. I believe camper was subjected to a lightning strike. could problem be in the thermostat?

  • Anonymous Sep 19, 2008

    i have a penguin duo therm roof a/c at an rv. fan motor got hot and was spinning low. changed motor, it spins free, but will not turn at low, medium, high speed, just humms, gets hot. will change capacitor, hope this helps

  • terpie Oct 07, 2008

    motor fan is seized. Can I replace the bearings or do I have to buy a new fan

  • Anonymous Mar 28, 2014

    Air was working fine but now fan wont run without spinning manually could it be the start capacitor

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  • 49 Answers

Sounds like 1 of 3. Blower motor capacitor, relay or thermostat. Try to run fan only if that is an option and see.

Posted on Jun 01, 2008

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