hi
a/c works, heater fan works, but switch above the radio doesnt, it worked yesterday but now it doesnt.
air is vented od windshield, and if i put the switch to another position there is no 'puff' noise whitch used to be during changing.

how to fix it?
maybe some valve or smth?

Jarek5_7
88 Iroc 5.7
www.jarek.arjmm.pl

 

its a vaccum switch on the hvac controls. maybe the line came out (ya rite, but its a possibility) u dont have any vaccum in ur system (if that was happening more than just ur hvac controls wouldnt work) the actual gate that opens behind the dash may be broke (ive never seen that heppen, but i suspose it could). thats all i can think of off the top of my head. get a haynes or chiltions manual and follow the system until u find whats not working correctly.

mike (loomdog)

 

I`ve screw out the switch from the dash, none of the lines came out, I`ve seen two valves like on the camaro illustrated parts catalog cd, I dont know how to check if they`re ok, but I`ve took the lines from them while engine runnig and there was no air pressure comming out.

on the passanger side of the engine I have a lossen line , the one i`ve shown on the picture, maybe thats the cause but I dont know where it goes, somewhere down.

how to check the vacum ?

(the car on the pic is not mine but thats the same line )