One day I popped into Chief's RV ( who sold us the 5th wheel) to talk to them about putting the hitch into the back of our truck. The guy (who looked a LOT like Ted Danson) asked "Are you going to live in it?" to which I replied, "Yes", and he said, "Wow (with a shake of his head) that's going to be really tough." "How so?", I asked, and he said, "The cold will getcha", to which I said, "We're relocating to Western Washington" and he got a blank look. One of the other guys chirped up, "He's from Idaho". All of us did knowing nods.
Well, now we have Idahoan cold temps here in Western Washington. Could it be that our unit just can't keep up? It's supposed to have the arctic package, so you'd think it could.
Rather than undertake an expensive search and fix, I think I'm going to buy an oil-filled space heater for the bedroom. That should make it fine.