My dometic thermostat showed error code E1 "comm error". Hot, humid, pissed. could not get it to work on Saturday, July 4! Decided to go get dinner and figure out plan b for the weekend.
During dinner some research indicated it could be a heat issue, for me and the AC units. One post (don't remember what site) suggested a bag of ice and a fan blowing cool air on the thermostat.
A couple of hours later, and after shutting down everything (Shore power and Batteries ) While I am RTFM'ing wife starts up the AC as though there was no problem at all.
Thank God for the Wife, and patience to let everything cool off, including my temper
Does a wiring problem still exist? don't know. Maybe, but time will tell if we get this error back.
4 nights later no problem.
Cheers!