Thanks Brian, I'm just mining for any and all experience out there with other Thor owners. Seems to be a lot of folks, especially with the ACE, who are going thru the same thing. I cannot believe that I'm the only Citation owner to have this issue, especially since it has occurred every time we really needed to run the air. Both Thor and my dealer have suggested just keeping the door open but that seems like a poor way to do business on a relatively expensive coach. Seems like TMC has a basic design flaw. Onan has suggested a vented door as a possible fix, but Thor does not seem to be jumping on that fix. So, has your work around solved the problem in your ACE?
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