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? Thank you
Forum Discussion
- I think I need a new control box 3107541.009 but can’t seem to find one, looks like they are obsolete
- Also I can hear and feel something clicking in the control box when I put a new fuse in
- Thank you for your reply and information sorry for lack of details. It is 2008 Heartland Bighorn model 3400RL. The AC is Dometic model 59516.331. I see 6 wires on the t stat, not phone style. The control box is 3107541009. Also furnace does not work. The furnace has a 20 amp fuse in the fuse box, but it’s not blown. One odd thing I noticed is when I put a new fuse in(which blows immediately) the CCI LP gas alarm beeps and the lights on it go out. Any help is greatly appreciated, thank you
- Depending on how your OEM wired the system. The AC system is protected by a 3 amp fuse ON the upper AC control board. That means YOUR fuse is shorted by the 12 volt wire run from the Roof top to the wall tstat. That said, you need to state WHICH Dometic control system you have. There are up to 6 or 7 different ones. Also, your Furnace may be on that 15 amp fuse and there is a short between the Furnace and the upper AC control board. You need to state if you have Phone type wire connections or standard 7 wire multi strand AC/Furnace wiring. Year/Brand/Model of RV will also help. Doug
PS. you just joined. ALWAYS list Year/Brand/Model of RV and Brand and MODEL of the appliance when asking for help.
