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.
Reply
  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 09-26-2015, 09:45 AM   #1
Junior Member
 
TillRodsFly's Avatar
 
Holiday Rambler Owners Club
Join Date: Jan 2012
Posts: 11
Duo Therm thermostat / A/C issue

Hey fellow Rv'ers! I have a 2001 Holiday Rambler Endeavor that has the 5 button Comfort Control thermostat. I went to try to turn both A/Cs on not long ago and when I switch to mode 2 that controls the rear A/C, the screen is blank and can't get he rear A/C or fan to turn on. I'm hoping that the thermostat just went bad. The rear A/C was working great the last time I used it (about a month prior). Has anyone else had this issue? Any help would be greatly appreciated. Thanks!
__________________

__________________
TillRodsFly 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 09-26-2015, 09:57 AM   #2
Senior Member
 
Retired Fire Service RVer's
Join Date: Jul 2015
Posts: 107
I have the same thermostat in our Allegro Bus but NO issues. I am thinking maybe there is a battery in the unit???.....or maybe you popped a 12 volt fuse somewhere???....check all your fuses and I may go out to our coach and see if there is a battery in it??.....
I just went out and checked....NO battery....I am thinking a fuse somewhere....good luck....let us know what you find.
__________________

__________________
Paramedic 1 is offline   Reply With Quote
Old 09-26-2015, 10:06 AM   #3
Senior Member
 
Country Coach Owners Club
Join Date: Jan 2006
Location: Redding
Posts: 3,412
Reset your AC breaker for that AC?

Check that the 120v wiring is connected properly at the second AC and has power with your multimeter.

If thermostat works it has 12v power.
__________________
Dean
1995 CC Magna #5280
C8.3L 300hp Cummins, 31,000lbs
deandec is offline   Reply With Quote
Old 09-26-2015, 10:07 AM   #4
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,084
I'm guessing you mean Zone 2 rather than Mode 2?

There are two thermostats with the name "Comfort Control", a Duotherm and an Atwood. Slightly different, so which one do you have? And do you have the Op manual for it? If not, you can download one online.

Try disconnecting & reconnecting the wires on the back of the thermostat. May be a bad connection there.

There is also a reset procedure that may work, but need to know which t-stat model you have. Most likely it resets like this:
Turn t-stat Off. Press and hold both Mode & Zone buttons and then turn On. It should display something like "Init" and re-connect to all the available zones.
__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 09-26-2015, 10:11 AM   #5
Junior Member
 
TillRodsFly's Avatar
 
Holiday Rambler Owners Club
Join Date: Jan 2012
Posts: 11
Thank you for your reply. Unfortunately I won't be back at the coach until tomorrow. I will definitely check all fuses. What is confusing and making me think it's a bad thermostat is that it controls everything else fine. It's just when I switch it to mode 2 for the rear A/C, then the screen turns blank. It's like the rear A/C doesn't exist anymore. It all worked great (rear A/C blew super cold) the last time I used it. (about a month prior)
__________________
TillRodsFly is offline   Reply With Quote
Old 09-26-2015, 10:15 AM   #6
Junior Member
 
TillRodsFly's Avatar
 
Holiday Rambler Owners Club
Join Date: Jan 2012
Posts: 11
Great info guys! Thanks! I will check and do everything suggested when I get back to it tomorrow. You are right Gary. I meant Zone 2. I'm 99.9% sure it's the Duo Therm.
__________________
TillRodsFly is offline   Reply With Quote
Old 09-26-2015, 10:37 AM   #7
Senior Member/RVM #90
 
MSHappyCampers's Avatar


 
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 26,329
Quote:
Originally Posted by Gary RVRoamer View Post
I'm guessing you mean Zone 2 rather than Mode 2?

There are two thermostats with the name "Comfort Control", a Duotherm and an Atwood. Slightly different, so which one do you have? And do you have the Op manual for it? If not, you can download one online.

Try disconnecting & reconnecting the wires on the back of the thermostat. May be a bad connection there.

There is also a reset procedure that may work, but need to know which t-stat model you have. Most likely it resets like this:
Turn t-stat Off. Press and hold both Mode & Zone buttons and then turn On. It should display something like "Init" and re-connect to all the available zones.

Just a little clarification to what Gary said. Continue to hold the two buttons in when you turn the power switch (the slide switch under the bottom) back on, then release them after a few seconds.
__________________
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
MSHappyCampers is offline   Reply With Quote
Old 09-28-2015, 09:23 PM   #8
Junior Member
 
TillRodsFly's Avatar
 
Holiday Rambler Owners Club
Join Date: Jan 2012
Posts: 11
Hey guys. Just got to the mh tonight. I unplugged the thermostat and noticed some corrosion on the back side of the circuit board around where the plug is. I cleaned it the best I could with electronic cleaner. Plugged it back in and it showed the rear ac (temp settings ect) but the rear ac or fan still wouldn't turn on. It showed it for about 10 seconds then went blank again just like it did before.

I then tried the reset as mentioned and now it won't switch to zone 2 at all. Every time I hit zone, it stays on zone 1. I reset the rear ac breaker but couldn't find a fuse for it. Where do I go from here guys? I tried looking for a new thermostat figuring it would be worth the gamble to try that but I can't seem to find my exact model. It has 50-981501-A on the circuit board. ANY help would be greatly appreciated!!!!
__________________
TillRodsFly is offline   Reply With Quote
Old 09-29-2015, 12:20 AM   #9
Senior Member
 
dutchstr3884's Avatar
 
Join Date: Jul 2010
Posts: 297
Seems to me that it could be that something in the Zone 2 AC is not working and because of that the thermostat can't "see" the AC. It may be time to go on the roof and remove the AC outer shroud and look for a breaker up there. Do you have the manual? Attached is a troubleshooting guide you may find helpful.
There is also a Dometic AC-Furnace Trouble Shooting Guide and a Dometic AC-Furnace Trouble Shooting Guide but they are too large to attach here. Do a web search for them. If you do not find them personal message me with an email address and I will send them to you.

Good luck
Attached Files
File Type: pdf Duo-Therm Control 5 Button Troubleshooting Guide.pdf (672.6 KB, 37 views)
__________________

__________________
2004 DutchStar DSDP3812, Cummins ISL 370Hp, Spartan MM Chassis, 2012 Jeep Liberty toad, Blue Ox Aladdin Tow Bar, FMCA #F451747
dutchstr3884 is offline   Reply With Quote
Reply

Tags
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
2002 SightSeer 30b a/c issue Sicksix Winnebago Industries Owner's Forum 9 08-20-2015 03:21 PM
Thermostat not controling A/C wmmaryyoung RV Systems & Appliances 4 06-12-2015 08:45 PM
a/c heatpunp issue kimbo RV Systems & Appliances 5 06-04-2015 07:00 PM
BCC repair A/c issue toledochas Thor Industries Owner's Forum 9 07-22-2014 07:32 PM
2014 Dometic Duo Therm AC Quits RV8 RV Systems & Appliances 0 06-22-2014 09:51 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:01 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.