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dometic comfort air thermostat

Has anyone had any experience with the Dometic Comfort Air thermostat?  We are pretty frustrated with  the original thermostat (switching between zones, primarily) and are looking for a replacement.  We would be interested in your experience and any issues having to do with installation.
2000 U320 mid entry  #5688
2006 Jeep Liberty


USMCR retired
SDFD retired
FEMA US&R TF8

Re: dometic comfort air thermostat

Reply #1 –
If you have a 4 button thermostat I have changed them to 5 button thermostats but don't know if you can still buy them new. I have a few 5 button upper cercuit boards but no 5 button thermostats
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins

Re: dometic comfort air thermostat

Reply #2 –
Is your problem that the buttons do not work very well any more?  You can have the buttons replaced/ repaired as well as the on/off switch.  Jim Frerichs on this forum does the repair.  There is also a guy on ebay that sells new buttons that you can use to rebuild the old ones in your thermostat.

 Edit to fix Jim's name
1998 U320 40'
2005 GMC Yukon
MC# 17609

Re: dometic comfort air thermostat

Reply #3 –
Hi Sven,

These 4 button thermostats are repairable. I've done hundreds of them.
Please call me at 308-440-5154.
Jim

2002 U320
Jim Frerichs
2002 U320 42'

Re: dometic comfort air thermostat

Reply #5 –
Unsolicited testimonial.  We just had Jim rebuild our four button when we were both in NAC at MOT.  Very happy with the results.  Not inexpensive but represents real value over the alternatives.
George and Steph
1997 U270 36 Build 5081 "Honu"
1180w Solar 400A lithium all Victron house system
Motorcade 17670, SKP 128300, FMCA F459019
73 VW Camper, 79 VW Camper, 2363 Sunline, and an Arctic Fox 25P

Re: dometic comfort air thermostat

Reply #6 –
Quote from: stevec22 –
Is your problem that the buttons do not work very well any more?  You can have the buttons replaced/ repaired as well as the on/off switch.  Jim Frerichs on this forum does the repair.  There is also a guy on ebay that sells new buttons that you can use to rebuild the old ones in your thermostat.

 Edit to fix Jim's name
Main issue is the difficulty of switching zones.  Often when we simultaneously push the two buttons to change zones, it changes the mode instead.  It is also difficult to see in low light.  My preferences for electronic devises (especially old ones) is to replace, rather than repair.
2000 U320 mid entry  #5688
2006 Jeep Liberty


USMCR retired
SDFD retired
FEMA US&R TF8

Re: dometic comfort air thermostat

Reply #7 –
This is what I'm looking at.  A friend with a '97 Foretravel has one.

Jet.com - Prices Drop As You Shop
2000 U320 mid entry  #5688
2006 Jeep Liberty


USMCR retired
SDFD retired
FEMA US&R TF8

Re: dometic comfort air thermostat

Reply #8 –
Quote from: Sven and Kristi –
This is what I'm looking at.  A friend with a '97 Foretravel has one.

That's better known as a Dometic CCC2 (Comfort Control Center 2).  You *might* need new circuit boards in the roof units.  I know the old 5 button controller won't work with new off-the-shelf Penguin IIs unless you change their circuit boards.  When we had our roof units replaced in 2015, we had to go with the CCC2 controller.  I don't know if it's backwards-compatible to the old Penguins, though.

Really liked it!
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320