[ChuckS]

I’d do a reset procedure on the Dometic thermostat and let it refind the zones, etc. mine did weird things after a power bump ... going into Celsius mode, weird temp settings, etc and this took care of the issue.

To do a system reset:
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Make sure the CCC 2 thermostat is in the OFF mode.
Simultaneously press the MODE and ZONE buttons. The LCD will display “IniT” and all available zones.
Release the MODE and ZONE buttons.
Press the ON/OFF button to exit system set up.