Defroster doesn't start AC

07-13-2004, 04:01 PM
My AC works great and the defroster does blow. But, when I turn on the defroster the AC does not kick on. Anyone seen this before? Would this likely be the dash switch or some relay/module?

1998/Jimmy SLT

just one more thing, Joe

07-14-2004, 08:01 PM
Does the A/C come on when you have the control module set to A/C? If the A/C compressor kicks in and works in "normal A/C" then it could be the control switch. The switch sends a "request" for A/C signal to the Computer along the same wire. If the A/C compressor comes on in "normal" mode and not in "defrost" then it could be the control switch.
JMHO :2cents:

07-15-2004, 11:39 AM
yes the compressor does kick in on A/C. I figure it's the control switch. I just want to see if anyone has had this problem and if the control switch fixed it.


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