I have an Holiday Rambler Admiral SE 2003, this week water was leaking inside from the air conditionner(top roof) (Dometic Duo-Therm) Does somebody know what is the problem? Thanks yves1956
Typically, it is the failure of the seal between the base of the air conditioning unit and the roof of your coach. The only good way to repair it is to lift the AC unit up, clean the old sealant off and reinstall.
You don't want water to get between the roof and your ceiling.