climate control (please help)

[trucker1211]

hello, i own a 2004 grand prix gt. my blower fan will not switch from defrost to the vents. whenever i turn the knob to defrost the fan slows, when i turn it back to the vents it picks back up. but it does not change over to the vents it stays on defrost.. (stuck in defrost mode)

 

[FordMan77]

Give these 2 threads a read and see if it helps. Sounds like one of the actuators is shot or one of the vac lines may be loose/cracked somwhere.

http://www.grandprixforums.net/hvac-issue-stuck-defrost-lower-only-help-76076.html
http://www.grandprixforums.net/blend-door-actuator-replacement-21941.html

 

[trucker1211]

thanks fordman, i parked it one night everything was fine then the next day for some reason it stuck on defrost. i never even turned it on defrost lol. i have tried looking for vaccum lines. while under the dash all i mostly saw were wires and connectors. under the hood it was hard to locate vaccum lines also. but i will try these links and see what i can come up with. once again thanks for your time...

 

[Scottydoggs]

the vac line comes off the engine to the firewall then down the pass side fender, under the fuse box it should have a T there, one side runs into the cab via the wire harness, the other may or may not lead to a vac ball in the driver side fender, it would lead across the rad support to the d/s fender.