In my 1992 Z28, if I have the A/C lever in the off position, my A/C still cycles. In the vent position it stays off like it should. In the heater or defrost position the A/C cycles. In the norm or max position A/C works fine. Is this just a problem with the interior switch and will a new one fix the problem. Thanks.

 

well im not to familure with how all that stuff works.. but it sounds like u might need a new one.. check the junk yards first !