Service VME - Heater Air Conditioning ( HVAC ) Control Head Does Not Respond - DTC electrical

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

Corvette (Y-Body) 1997-2003 Heater/Air Conditioning (HVAC) Control Head Does Not Respond

A condition exists where the HVAC control head may not respond if the temperature control knob is rotated to quickly back and forth from hot to cold. The HVAC control head may not respond to requested temperature changes or it may have warm air blowing out of one side of the dash and cold air out of the other side. If this condition exists it should not be considered a faulty HVAC control head.

Replacing the HVAC control head will not eliminate the occurrence of this condition.

The owner should be advised to rotate the temperature control knob more slowly to prevent this condition from occurring. The owner should also be advised that turning the key to the off position will clear this condition and allow the HVAC control head to resume normal operation.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.