My air lock on my coach hasn't worked since we got it. And now, the door latch mechanism won't catch tight (when closed, the door has some give/play). We examined the latch mechanism last weekend to try to find an adjustment, but came up empty. It does appear that the post on the door frame that the latch catches on is worn and we wonder if it needs replacing. I'd love to get the air lock working, but don't know where/how to start troubleshooting. It seems to me that it doen't even have power to the switch. Any suggestions about the air lock or the door latch? Or should I just take it to one of the recommended bus/conversion companies like Parliament? (We're taking the bus to Disney World next week and will be in the central Florida area 2/15 to 2/19)