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Hi my name is Robert....
On some of the Dometic thermostat there was a glitch where if the thermostat got to warm due to the inside temp of the caravan being to hot it could trigger that code. What you can try is remove the T-stat and put it in the fridge for a few mins and then hook it back up and see if that fault goes away, I know is seems strange but I would give it a try. If that does not work I would get it in to a shop to diagnose further... IF you have more questions or concerns please feel free to contact me... Robert
Where are you seeing the E-2 error, on the thermostat or on the AC unit? I was thinking this code was coming on with the thermostat....
Let me look into this a little more for you, I was thinking it was coming up on the T-stat, IF I do not have any info on this I will let you know and then put your question back up for others to view.... Robert
I do not have anything for this AC unit, I am going to put your question back up for other experts to view. I do not know when another expert will respond, they come and go daily. Sorry I was not able to help, Dometic has all kinds of different makes and models.... Robert