firstly I apologise if this has been asked before, I have searched forums and didnt see anything. We currently have an issue with our fridge Dometic 3 way RMDX 21. It works well on Gas and 240 volts however when we switch it to battery when hooked up to car it alarms red (red light intermittently) and beeps. We can hear a clicking like its trying to connect to the gas. We have eliminated the connection to the car, everything else is connecting ok. We have the car running when connected. I want to know where to start looking and if anyone has experienced this and how to fix it. TIA.
