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pjw73nh's avatar
pjw73nh
Explorer
Nov 11, 2017

Dometic RM2453. LP good, AC freezes, nothing on DC.

Dometic RM2453. Works fine on LP, freezes on AC and does not appear to do any cooling on DC. I know from what the previous owner told me that the AC heater was replaced last year. I am using the...
Rvpapa's avatar
Rvpapa
Explorer
Nov 13, 2017
There is only ONE thermostat. From all that you have observed it sounds like the 12 volt heater is not in good thermal contact with the boiler. Perhaps it was not installed in the socket / tube that is on the boiler, or welds have been known to corrode and separate. If this is the case there is no simple fix. Rewelding on a closed system full of amonia is a sure way to ruin your day.
Art.

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