We have a Thor Four Winds 24HL. Bought it new about a year and a half ago. Every once in a while, probably one out of ten, When I hook up the city water it won't work and I have to use the pump and fresh water tank.
I suspect that there is a check valve that might be sticking, but wanted to ask before I start taking things apart if anyone else has had this experience. Is there is a procedure that I should be following?