Operation CHARM: Car repair manuals for everyone.

System Check - Refrigerant- HVAC System - Automatic

Perform the following test in order to determine whether the electrical, vacuum and refrigeration Systems operate properly.

^ The electrical circuits operate properly if the following conditions are true:
- Proper operation of the air conditioning modes and the blower at all speeds with the mode lever in any position except OFF
- Engagement of the compressor clutch
^ The system is properly charged when the evaporator pipe and the accumulator surface have the same hand-felt temperature.