Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 06-13-2013, 10:10 AM   #1
Junior Member
Join Date: Jun 2013
Posts: 15
Duo-Therm Air Conditioner Troubleshooting

I have a Model 57915.331 A/C unit on my '99 LaPalma, and the compressor runs, but the fan motor has quit. It turns freely, but will not run, so the unit freezes up and stops. Anyone who could help me determine if this is just a motor problem, capacitor, or something else? Thanks in advance.

pearlyvereen is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-13-2013, 10:33 AM   #2
Senior Member
Jim_HiTek's Avatar
Join Date: Nov 2011
Location: Full time RV'er
Posts: 1,760
If the motor buzzes but does not spin, it's probably the cap. If it doesn't even buzz, then it's not getting voltage so you'd want to look at the wires and connectors for cuts, corrosion, or looseness.

'02 Winnebago Journey DL, DSDP, 36' of fun.

Visit my RV Travel & Repair Blog at : http://chaos.goblinbox.com
Jim_HiTek is offline   Reply With Quote
Old 06-13-2013, 10:35 AM   #3
Senior Member
Join Date: Sep 2007
Location: texas
Posts: 2,287
I'm no expert but mine did the same it was capicitor
whem2fish is offline   Reply With Quote
Old 08-04-2013, 04:45 PM   #4
Junior Member
Join Date: Aug 2013
Posts: 3
I have a DuoTherm 600315.331 the front main unit on 06 Coachman 40'
When it was used last, while it was running, something was causing the generator to rev up, and the amps jumped from 22 to 65 or so...what could be the problem?
Don n Vickie is offline   Reply With Quote
Old 08-04-2013, 08:40 PM   #5
Senior Member
gemini5362's Avatar
Tiffin Owners Club
Freightliner Owners Club
Join Date: Apr 2012
Posts: 2,079
Originally Posted by whem2fish View Post
I'm no expert but mine did the same it was capicitor
guys I have never looked but I am a bit suprised are you saying the actual fan motor has a starting capacitor. Those are very small motors I am sure there is a cap for the compressor but I am suprised if there is one for the fan motor itself.

To the original poster. If it spins free just disconnect the leads going to the motor and see if you have any voltage where the leads plug in. should be 115vac. If you have voltage and the motor spins freely it would be time for a new one.

You can probably go to a place that sells electric motors and get one cheaper than through an RV dealer just take yours out and take it with you.
gemini5362 is offline   Reply With Quote
Old 08-04-2013, 09:46 PM   #6
Senior Member
Daytripper63's Avatar
Fleetwood Owners Club
Join Date: Sep 2004
Location: Roseville
Posts: 194
Yes there is a capacitor, I just had to replace my motor cap a few weeks ago. A easy way to test if it is the cap is start the a/c unit and then give the blower wheel a good spin to get it started, if it continues to spin then you need a new capacitor. Mine was a 7.5mfd-370 for the motor and a 30mfd-370 for the compressor since the one failed I just bought 2 of each and replaced all the capacitors with new and put the old ones in the tool box just in case
2008 Fleetwood Providence 40X
1957 Willys in tow or 2012 Wrangler Rubicon
Roseville Ca.
Daytripper63 is offline   Reply With Quote
Old 10-21-2013, 02:46 PM   #7
Junior Member
Join Date: Oct 2013
Posts: 3
Two capacitors

Over the weekend at the SE camper rally, my Duo-Therm AC quit. After hearing only a slight hum, I suspected a possible capacitor. I unbuttoned the unit to find two capacitors. I'll replace both tomorrow. Thanks all...
xkscsco is offline   Reply With Quote
Old 10-21-2013, 06:13 PM   #8
Senior Member
tom77hmstd's Avatar
Join Date: Jan 2011
Location: homestead fl.
Posts: 283
We had exact same problem. Turned out to be a circuit board. It is in the box where the fan connections are. The load from running the fan burned the connection on the circuit board on mine. Symptoms where compressor ran but no blower. For what it's worth. I did replace the caps first. no help.
Tom Homestead Fl.
2006 National RV Tradewinds 40D
tom77hmstd is offline   Reply With Quote
Old 02-12-2014, 12:35 PM   #9
Junior Member
Join Date: Jun 2013
Posts: 15
Thermostat problem

Upon closer checking, I found a broken contact in the thermostat. Once replaced, no more problem. Thanks for your help.

pearlyvereen is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:44 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.