You know this reminds me, now that the weather has changed, I am noticing I have no heat from the center vents, (not to hijack this thread but) I know I have seen postings on this before somewhere, but cant recall where, anyone have a link handy? I am sure it isn't vacuum related as all other aspects of door locks and engine shutoff etc. are working very well, and door locks will still unlock after sitting for a few hours.