The 2000 HVAC is actuated by vacuum. Check under the dash for disconnected, damaged, or broken vacuum hoses. I have attached a list of where the vacuum hoses go to help. Let me know what you find.
PS: It isn't real easy to check these. They are up and under the dash. If you are lucky, with the engine running you may hear a hissing sound that would indicate a leak.
Monday, December 27th, 2010 AT 3:44 AM