How to reset5 button duo Therm thermostat?
Olivia House
Published Feb 09, 2026
How to reset5 button duo Therm thermostat?
For 5 button reset:
- Turn the ON/OFF switch to OFF position.
- Simultaneously depress and hold the MODE and ZONE push-buttons while turning the ON/OFF switch to ON. FF should appear in the LCD display until the MODE and ZONE push-buttons are released.
How does duo-therm comfort control thermostat work?
Have a Duo-therm comfort control thermostat (5 button) with 2 air conditioners and a furnace. Have not used the ac for a while. Zone 1 I turned on the ac set the temperature and the ac came on as normal. When I changed to zone 2 there was no display except for the “2” indicating zone 2, also the backlight was lit.
Is there a 4 button upgrade for the Dometic?
The 3310009.000 Upgrade Kit is designed specifically for all Duo Therm and Dometic Air Conditioner Models using the 4 button Comfort Control Center with the circuit board built into the electrical system.
What does Zone 2 mean on duo thermostat?
When I changed to zone 2 there was no display except for the “2” indicating zone 2, also the backlight was lit. I then reset the thermostat per manual by turning thermostat off, holding down zone and mode buttons and then turning the thermostat on. When the thermostat rebooted only zone 1 is now available.
Why is my Dometic duo thermostat not working?
But such is not the case and here are some common Duo-Therm thermostat problems and their solutions: 1. The thermostat won’t stay on or turn on – the first place to look will be your on/off switch. If there is a crack in the solder making the connection, then no power will be sent to the switch.
What are the buttons on a duo therm?
It has a 4-button Duo Therm Comfort Control Center that operates the A/Cs, heat strips and furnace. If you have one of these you probably have had problems with the buttons from time to time. To change zones you have to mash down both the FAN and MODE buttons at the same time.
Have a Duo-therm comfort control thermostat (5 button) with 2 air conditioners and a furnace. Have not used the ac for a while. Zone 1 I turned on the ac set the temperature and the ac came on as normal. When I changed to zone 2 there was no display except for the “2” indicating zone 2, also the backlight was lit.
When I changed to zone 2 there was no display except for the “2” indicating zone 2, also the backlight was lit. I then reset the thermostat per manual by turning thermostat off, holding down zone and mode buttons and then turning the thermostat on. When the thermostat rebooted only zone 1 is now available.
How to troubleshoot a broken Dometic duo thermostat?
To troubleshoot this issue look to your fuses, including the ones under the rooftop of your RV. Then if blown replace the fuse and you should be good to go. To learn more about fixing a broken Dometic Duo Therm Thermostat just continue to read our article.