With RPO C68

DIAGNOSIS
Temperature control problems can be traced to the refrigerant system, electrical wiring or vacuum connections, mechanical problems (i.e. sticking valves), and/or the A/C control assembly.

Refer to Heating and Air Conditioning / Testing and Inspection for diagnosing refrigerant, vacuum or mechanical problems. Refer to Testing and Inspection under the appropriate component for diagnosing electrical problems and for diagnostic procedures on the A/C control assembly/microprocessor. Wiring and vacuum diagrams can be found under Diagrams for the appropriate component.