How to reset a Dometic thermostat

Have you adjusted your Dometic thermostat setting only to find it is not responding? The experience can be frustrating, especially when you were hoping for cooling on a humid day or more heat on a frigid day.

If your system is not running at all or seems to be operating well, but you cannot feel cool or warm air coming from the vents, you have to figure out what to do next. In most cases, the best solution would be to reset your Dometic thermostat.

If you own a Dometic Single Zone LCD thermostat, the system comes pre-programmed with specific settings. Heating is 68ºF or 20ºC, Cooling is 72ºF or 22ºC, Fan Speed is Auto, Mode is OFF, and Furnace Differential is 2ºF.

You can review the settings and adjust them to your comfort level. The best way of achieving this is to use the ON/OFF mode on the unit. It will allow you to program the system by deleting the factory defaults.

How to reset a Dometic thermostat

The reset procedures might differ from one Dometic thermostat model to the next. Here are guides for different models.

1. Single zone Dometic thermostat

You can reset a single zone Dometic thermostat if you want to adjust temperature or time. Here are steps to follow:

  • Ensure the thermostat is in OFF mode.
  • Simultaneously, press and hold the MODE and ZONE buttons.
  • The LCD will display IniT and all available zones.
  • Release the two buttons.
  • Press the ON/OFF button to exit the system set up.

After the reset, you will have to set up the system again, including adjusting time and temperature.

2. Dometic 10-button thermostat

When you install a Dometic 10-button thermostat and install the dip switches on the control boxes as recommended, you will have to perform a system reset.

Here is how to reset a Dometic 10-button thermostat:

  • Turn the thermostat OFF.
  • Simultaneously, press and hold the MODE and ZONE buttons.
  • Continue holding the buttons until the display reads IniT and all available zones.
  • Release the two buttons.
  • Press the ON/OFF button to exit the system set-up.

The thermostat will turn back ON and complete the reset.

3. Dometic 5-button thermostat

Resetting a Dometic 5-button thermostat will return the system to factory default settings.

Here is what to do:

  • Turn the thermostat OFF.
  • Simultaneously, press the MODE and ZONE buttons while turning the switch back to ON.
  • The system will display the letters FF on the screen.
  • Depending on your model, the letters could appear right away or in 15 seconds.
  • Continue holding the buttons until the system initializes.
  • Release both buttons.

Your system is now reset. The next step is to program it to your liking.

4. Dometic dual-zone thermostat

You can reset a Dometic dual-zone thermostat if the system is not turning ON or not giving you the ideal temperatures. Here are steps to follow:

  • Turn the device ON.
  • You should see the light and annunciator data.
  • Press the MODE button to activate the annunciator light.
  • Simultaneously, press the UP and DOWN buttons and hold them for a while.
  • While holding the two buttons, use another finger to press the MODE button and release it right away. Ensure to press the button once at this time.
  • After releasing the MODE button, release the UP and DOWN buttons.
  • Press the MODE button again.
  • The thermostat light will go out.
  • The MODE will read OFF. If it does not, repeat the above steps.
  • Test the system to check whether the reset has worked.

If the system is working, re-program your settings to the proper temperature levels.

What to do when Dometic thermostat won’t turn on

If your Dometic thermostat won’t turn on, here are some troubleshooting steps you can follow:

  • Check to ensure the batteries in the thermostat are working well or have enough power.
  • Check to ensure the 12v fuse is not damaged.
  • Ensure the power connection on the back of the CCC2 is not loose.

If you have installed the unit in your RV, you will have to reboot it. Begin by unplugging the trailer from the shore power. Next, switch the battery to STORE mode. Once done, fire it up again to reboot it.

Final thoughts

You can reset your Dometic thermostat if you notice the system is not giving you the ideal temperature readings or not working in general.

Depending on your thermostat, you can reset it by pressing the MODE and ZONE buttons simultaneously and wait for the system to initialize. Ensure your thermostat is OFF before resetting it.

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