vent

I have a 1996 Buick Park Avenue Base the AC and mid fan setting do not work. Sounds crazy but was in a car wash one day and the mid vent just started working out of no where... (Quit after exit) I feel like this is caused by a vacuum line, or blockage. I saw a similar post on forum some time...

Hello, I've got a p0440 trouble code. I vacuum tested the purge solenoid and it tested good. At the rear of the Buick I tested the vent solenoid. It tests good if I take it off and apply external power to it but doesn't seem to be engaging while plugged into the vehicle. I've had my wife...