Question about Dometic Rooftop RV Air Conditioner

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Blower Fan Not Working

I have a DUO Therm rooftop unit. It has not been used in two years and now only the compressor is working. No fan regardless of the setting used...

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  • mgehard Feb 24, 2009

    I took the unit apart yesterday and noted the fan motor was locked up. I guess the bearing locked up on it. I ordered a new motor kit for $130 today and will replace next weekend. Was a pain to get the motor out...had to loosen and move the coils, etc. Hopefully the motor is all that is damaged. It had less than 100 hours on it!!

  • max64 Mar 12, 2009

    My fan won't start unless I start it by hand. I'm not sure how to tell if the motor is bad or the starting capacitor.
    Any ideas?


  • louiethek May 06, 2009

    Dometic Duo-Therm - 13,500 B.T.U. Model #3107541.009 - Serial # WA346967 - Yr. 1999-2000. Blower motor will not start. Replaced the start capacitor - no help. It will run by spinning the motor by hand and flipping the fan switch while it is still spinning. Compressor runs okay. I suspect it is the circut board in the control box. Or could it be the other start capacitor located next to the fan motor capacitor? If it is the controller circut board, where can I find a replacement (part number 3107168.001)

  • mrkman77 May 22, 2009

    having simalar problem with my duo-therm unit. Blower works in fan mode but not in ac mode. ac works but no blower?

  • mrkman77 May 22, 2009

    having simalar problem with my duo-therm unit. Blower works in fan mode but not in ac mode. ac works but no blower?

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Try taking the top cover off the unit and spin the fan with your hand

Posted on Feb 23, 2009

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