bravobob

2000 Bravada, even with the temp control all the way on coldest setting, the damn vents are blowing hot air. I noticed also a strange sound coming from under middle of dash. The sound would come approximately every 13 seconds and would make a creeking door closing sound. That sound quit but the heat on all the time is killing me. The blower control set to off still blows enough to feel air coming out of the vent which it never did, when the blower **** used to be on off, NO air would be coming out of vent or perhaps it was but if so it was cooler air and I never noticed it before. I dropped the lower dash panel and the only thing I could see is a round vacuum bulb hanging freely by a metal tang slipped up over a lever that goes into ducting. It just hangs there and it has 2 vacuum ports with no hoses attached to it??

442Harv

Not real sure about your car, but doesn't it have a heater control valve? That is what is usually wrong, with most cars with that type of problem.

2000 Bravo

My 2000 Bravada with computer climate controls constantly blows a little hot air all the time. Doesn't matter what settings are changed. Even with the AC on it still blows hot. Blend door wouldn't move so I changed the actuator. No help. Blend door moves free without the actuator installed. Any way to temp fix it so its not roasting me out ?

Yellowstatue

On my '99 Aurora I removed and plugged the vacuum line for the heater control valve until I could figure out what was the correct item to repair.