Dometic trouble shooting guide…
E1 Error Code: What Does It Mean and How to Fix
An E1 error code could mean the Dometic thermostat has lost connection to one or more of the power circuit panels. To clear this error, try the following workarounds:
Reset the thermostat Dometic thermostat. Check to see if it works.
Reset the Dometic power fuse. If this does not resolve the problem, proceed to the next step.
Switch off and on the main power circuit breakers.
If none of the above steps clear the error, you should have an AC specialist check on it.
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