Forum Discussion

mileshuff's avatar
mileshuff
Explorer
Sep 21, 2014

Dometic AC, Thermostat no power, where is 12v fuse?

Air conditioning stopped working on my last trip. LCD thermostat display is blank. It's not getting 12VDC. Thermostat has 3 wires going to control box thats mounted just above the filter grill. ...
time2roll's avatar
time2roll
Nomad
Sep 21, 2014
The 12v feed does come from the grey box up in the ceiling however there is no fuse up there afaik. Good to go up there and check 12v power though.

I think the fuse will still be part of the stack near the converter. Just a likely to be a bad connection up near the grey box.

Good luck.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,267 PostsLatest Activity: Jun 14, 2025