RV Trip Planning Discussions

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 06-07-2018, 09:13 PM   #1
Junior Member
Join Date: Jun 2018
Posts: 2
Thermostat won't turn on Roof air conditioners

Went out yesterday to wake up our 2003 National TropiCal 36' diesel pusher from its long winter nap. Started to test A/Cs but thermostat would only light up, but not activate the units. And today same thing, thermostat would only light up, but today when pushing Zone, instead of going from Zone 1 to Zone 2, it would skip from furnace to fan over and over (but it didn't ever go to the cool reading), but nothing comes on. There is power to the units on the roof. Anyone know if the problem is that the thermostat is dead?

cmwil 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 06-07-2018, 09:27 PM   #2
Senior Member
Skip426's Avatar

Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 17,200
Welcome to iRV2.

Sorry you're here with problems .
Question . Is your thermostat a 4 button Duo-Therm , Comfort control unit ?

Some members report , that removing the unit from the wall and disconnecting it from power for 30 seconds performs a full reset .
First thing to try.
The actual 4 button model is no longer made and swapping it for a 5 button unit requires up dating the roof A/C control boards , but there is a company that re-builds the four button model.
EDIT : Just in case it is a four button and a reset doesn't help , info in this link might help.

Duo therm 4 button thermostat

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 06-07-2018, 09:56 PM   #3
Senior Member
ThePowells's Avatar

Join Date: Mar 2017
Location: Zebulon, NC
Posts: 4,492

Welcome to the forum!. We're sorry that it took a problem to get you here, but we hope that you will stay engaged after you have a resolution.

I'm sorry that I am not able to help you with your problem, but keep asking and we will find something that I have a clue about.
Kelly and Jerry Powell with Halo (Lethal White Aussie), Nash the Rat Terrorist, and now Reid, the "Brindle we have no idea puppy"
2017 Thor Quantum W31, Ford E-450, Onan QG4000, Demco Kar Kaddy, Toytoada Prius.
ThePowells is offline   Reply With Quote
Old 06-08-2018, 10:37 AM   #4
Senior Member/RVM #90
MSHappyCampers's Avatar

Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 35,708
Hi ! Welcome to IRV2! We're sure glad you joined the gang!

The first step would definitely be to do the factory-recommended reset on the thermostat.

Good luck, happy trails, and God bless!
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
MSHappyCampers is offline   Reply With Quote

air, air conditioner, roof, thermostat

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Remote thermostat for roof air residential thermostat swap?? supertramp Travel Trailer Discussion 6 01-12-2017 08:39 PM
2004 DS Air conditioners won't run danny124 Newmar Owner's Forum 6 06-04-2016 07:15 AM
Pot Holes and roof mounted Air conditioners Luckiest Dreamer iRV2.com General Discussion 3 11-10-2015 09:28 AM
Supplemental Roof Air Conditioners graciebb Winnebago Industries Owner's Forum 16 09-13-2014 05:17 AM
Dual air conditioners won't run together aaamarine Class A Motorhome Discussions 2 04-06-2012 02:07 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:00 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.