Mercedes sprinter heater problems

Mercedes sprinter heater problems

2011. No floor heat. Leaver on cam is not right. If I move leaver far right outside cam path, door/flap opens to floor. Seems like a factory assembly faux-pas. I put it back together. 8 hrs wasted time to diagnose problem. 80% of van use is march-oct. Not worth fixing for 20% winter use. I'll wear boots n long johns.