Yeah, the air was coming out of the main face vents ok since buying the car and then one day after turning it back from demist it wouldn't change but is stuck on demist. The fan and everything works and the dial turns to all the different settings but it just comes out of demist and can't get it to go on floor or face or anything. What is wrong and whats the easiesrt way to get at it to fix it? Thanks, Dan
No I dont hear a hissing noise and that is the problem - where is the control grid for the hoses exactly or what has most likely gone wrong? It is not an electronically controlled one but just a standard vent dial with demist/legs/face/recycle etc. Dan
Looks like one of the vacuum hoses has come off or is leaking. There are about 6 vacuum lines on the back of the vent selector switch, the vacuum tank is behind the glove box and one of the hoses goes from that to the engine where it gets the vacuum. I'd be checking all the hoses, starting with the one that connects to the engine. I can't remember where on the engine it connects but if you follow the hoses you should find where it leads. It will be somewhere on the intake manifold.
as accentstencil said, check all vacuum lines, remove the control panel and check all the connections there, once you have a look over that stuff let us know.
You have to remove the dash surround in order to remove the control panel. I would check the line that connects to the inlet manifold first.
Fixed. Reached in behind the top of the manifold cover and pulled the vacume hose up without any resistance - it was dangling. looked from the right hand side under the hood to just behind the cover and saw a shiney brass nozzle sticking out which obviously was missing a hose. cut the end off for tighness and my air con is back again. Thanks for the advice - a pretty good result for my first post. Lucky I didn't pull the dash apart and it just goes to show ya, sometimes the answer is staring you in the face if we only make those little checks. Cheers fella's.
ah very good, ive always seen the vacuum line come of the throttle body but never one off to the manifold from the HVAC.
