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I have a 2003 Cavalier, and there is something wrong with the air system. When I try to change it from where it blows on your face to your feet, or change it to defrost, the air still comes out of the upper vents. Also, when i try to change it, the control flicks back quickly to the upper vent option. once again, even ifthe controldoes stay where i put it (ie defrost) the air still comes out of the upper vents. any help?
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You have a vacume hose that has been disconnected. Poke around under the hood. I had the same problem with mine. Up by the firewall I had a line that was disconnected.
I sort of have the same problem. I have a 1997 Suburban K1500 with a defrost issue. I can change all the fan speeds ok. I can change the temp ok. But when I turn the dial to change the Face/Feet/Defrost it is stuck on feet. The AC button does not light up anymore, and the re-circ air botton doesnt work either. I think there was a short somewhere. I took it all apart and found out that the control module had 2 burnt areas on the pc board. I soldered a jumper wire to the wire loom and I got the temp to change, but the flow switch is still not working. I have tested the Actuator motor down on the box for movement and voltage and it seems to be working but really slow. Has a hot if 14V and a variable of 6-8V when I turn the flow control dial (Which tells me that the switch is still OK. So what could it be?
A/C Heat Defrost Control Panel
