Need HVAC controls help
Need HVAC controls help OK so I ran into this prob about a week ago. It seems that I have lost control of where to direct my heat. I have full control of how high and low the fan goes, and I have control of how hot or cold, but it is stuck on defrost and aimed at my feet. No matter where i put it even on AC or MAX AC it will not go anywhere but defrost and feet. I did some pokin around and found a yellow, blue, green, purple and orange wire that seem to be the vacuum lines that go into the HVAC controls some where. Does anyone know how I can fix this problem??? I'm stumped is it vacuum, electrical??? Thanks in advance
did you do any work on your engine? there is a vacuum line that comes off the back of the intake and goes into the firewall to the right of your computer. if anything happens to this vacuum you will loose your selector.
Most auto parts store have a little section with various vacuum fittings, nipples, T's and such. Bring whatever is left of your old one so you have something to refer to and you should be able to find a replacement.
Go to gm that is not a t it is a one way check valve that holds vaccum for a/c under WOT conditions to keep it from falling to the floor and defroster. It is about ten bucks new.
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mine did not have a check valve in the tee. it has a check valve next to the computer where the two lines come together.
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Joined: Jul 2010
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From: Northwest Arkansas
I have the same problem, however my T connector looks good! I just changed the transmission and i am afraid i might have knocked off the vacum hose off the back of the intake! Does anyone know where it is located at the back of the intake? I can't hardly see anything!!!!
