Dometic Ac keeps blowing 12 volt fuse
I have a roof top dometic ac unit and the 12 volt 15 amp fuse keeps blowing immediately upon inserting a new one, it has the duo-therm t stat, any one have any experience with this issue? Or advice? ...
Forum Discussion
Tjpries1 wrote:
I disconnected the blue wires for the furnace, still pops. I disconnected all the wires except the 12volt + and -, it still pops. Ac 6 pin is unhooked also. When I disconnect the 12v + from the control box the lp warning works fine and the fuse doesn’t pop
The 6 pin is ALL 120 volt. The control box is just a galvanized box held in place with 1 or 2 screws. Drop the box and remove the 1/4 inch case cover screws. This will expose the Circuit board. Look for a shorted inside wire connection or melted connection. Turn the 120 breaker OFF for the AC unit when doing this. You have isolated the problem to the control box. The Dometic P/n you are looking at is for the complete Galvanized box and board, once you remove the cover you will see a Dometic P/n ON the control board. Usually starts with 31. Doug
