HELP - Heater / AC control not working - Gen I

[RT/ED]

Just removed and replaced dash on my 95. The blower motor is working, but the heater / AC selector switch that controls defroster, heat, vents, etc. is not having any effect on the direction of air flow. Any ideas?

 

[Tom Sessions]

Does the air only blow out the defrost vents? If so you have a vacuum supply issue.

 

[RT/ED]

Does the air only blow out the defrost vents? If so you have a vacuum supply issue.

Yes, only blowing from defroster vents.

 

[RT/ED]

Tom - spot on diagnosis! The vacuum harness was disconnected from the back of the heater / ac dash switch. Thanks for the help!

 

[Tom Sessions]

Glad it was something simple.