Thank you everyone who has taken the time to respond. I intend to explore the coach today and see what I can find. These tips have helped a lot. The air seal, IMO is excellent IF your door is out of alignment a bit. Mine is pretty straight so I probably don't need that seal. That said, it may be something as simple as the air line feeding the seal has come loose. That's on my "things to check" list. Also, the valve has now been identified so I'm going to check that closely too. I may simply plug that air line and be done with it for now. Anyone know a part number for that valve? Finally, since valves have been known to fail and the air seal maxes out at 4psi, it seems there should be a pressure gauge on that valve or in the line somewhere. I don't see one on mine. It looks like the same valve I have to change the tag axle pressure, but I'm not sure. Everyone enjoy the New Year's celebrations and I'll post tomorrow what I discover today.....Dennis