I have a new 385th we were out at Quartsite for the RV show, we loaded up our buggy in the back the night before heading home we were using the heater and had the CO alarm go of, f the only thing that I can figure is the heater blowing in the garage blows the gas fumes from the car under the door in the 1/4 bath into the living aria seeing that there is at least a 2 inch gap at the bottom of both doors I can see the heaver gas fumes would be pushed into the living aria the big glass door has a great seal on it but what should be done with the other doors? Any one had this?

I think I can put a seal on the door that goes into the garage from the 1/4 bath would be good