To RESET (Re-Boot) the Dometic DuoTherm 4 button thermostat:
Turn the thermostat ON
Touch any button to turn the Back Lights ON
Press and hold in the UP and DOWN Buttons
Press and Release MODE
Release the UP and DOWN Buttons
Press and Release MODE Again
The Back Lights will go out to signal success.
IF the Back Lights do not go our, repeat until they go out.
If your push buttons are stick in or skipping this may be difficult
To RESET the Dometic 5 Button Thermostat:
Press and Hold in the top and bottom buttons,
Turn ON the bottom On/Off switch
FF will appear, release the buttons.
IF EE appears, there is a fault with the communication cable