I took my '98 Corvette into a Chevy dealer for the following repairs:
Replaced the Headlamp Actuator... Found internal short on BCM (warranty
company denied claim)... Found brake fluid present @ EBCM and BPMV Replaced
both modules. Manually bled and power bled BPMV... Found underhood
connector corroded - Repaired circuit and removed connector... Splice SL
8.695 Parts... Changed Oil.
When they returned the car to me the A/C was blowing HOT (much hotter than
outside temperature) out of the center and driver's side vents, and nice and
cold out of the passenger side vents. The technitian claimed he didn't touch
anything A/C related, but admitted the A/C worked fine the day before when
he test drove it.
I remember the same thing happened at another Chevy dealer when they
installed a starter. The service writer took it to the back and within five
minutes brought it back working fine. He said the A/C just needed to be
"reset." Unfortunately this tech didn't have a clue what to do. Anybody have
any idea what could be the fix for this?