Hi, I have an issue with keeping the 12 v working when frig is connected. The 12v cord gets hot after several hours then the dometic frig gets an amber light. If I disconnect the frig and wait till the cord cools off and plug it back in it works again. I have an Opus trailer with 3 12v plugs and all 3 do the same thing. I called Domeyic and was told I had a ground problem. I had the 3 12 v plugs checked and could not find a problem. The frig works just fine when plugged into 120v. The frig will run fine in late evening when the weather is cooler. Any help on what the issues are would be appreciated.