Originally Posted by cavie
I guess you have never seen a Suburban SF-30 heater. Very common heater. I have owned 2 of them. No exterior access. Intake and exhaust vents only. Requires inside removal. No DIY testing procedures. You need a a work bench. A gas supply. A 12 volt power supply. And aboard tester.
yrs ago a friend had one in a cougar 5th wheel. It was really easy to get out and to a repair shop. I can't remember what was wrong, didn't cost much.