Question about Dometic Rooftop RV Air Conditioner

1 Answer

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...

Posted by on

  • 3 more comments 
  • 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?



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 96 Answers

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

Posted on Feb 23, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Repairman can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Repairman (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Duo therm 57915.331 not cooling

make sure fan on auto and on cool if ok bad cooling unit

Jul 05, 2012 | Dometic Rooftop RV Air Conditioner

2 Answers

Compressor won't kick off

What happens when started in just fan mode? Sounds like relay stuck.

Jul 28, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

RV A/C blower not working and keeps kicking out

If blower not working, and yoou hear a slight "Hum" with fan only on, try this. With power off to AC. Go up on roof, and slide a stick through opening on side near rear, and try to get to fan blades at rear of unit. try to spin the blades a few times, even if it only goes a little at a time. Unless you want to take all those screws out & remove cover to get at it better, but watch for wasps under there. Give fan a couple of full rotations, then have someone turn it on to fan only & see what happens. If fan finally works, let it run for a few minutes on fan, then try cool & see if it all comes together again. Let me know.

Jul 17, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Compressor intermittent

Sounds like a bad thermostat. Make sure you turn off all related breakers and disconnect switches before attempting to replace it. Good Luck!

Jul 06, 2008 | Dometic Rooftop RV Air Conditioner

1 Answer

Duo therm roof top a/c

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

Jun 01, 2008 | Dometic Rooftop RV Air Conditioner

Not finding what you are looking for?
Dometic Rooftop RV Air Conditioner Logo

Related Topics:

896 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dometic Heating & Cooling Experts

Bill Long

Level 3 Expert

588 Answers

mike cooper

Level 3 Expert

884 Answers

Tim Whalen

Level 3 Expert

3074 Answers

Are you a Dometic Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides