Functional Test/Check

To help in determining whether or not the air conditioning, electrical, vacuum and refrigeration systems are operating properly, perform the Functional Test and the following checks:

1. Operation of the air conditioning blower at all 5 speeds with the mode lever in any position and engagement of the compressor clutch will indicate that the electrical circuits are functioning properly. (The blower will not operate with the switch in the OFF position).
2. The same HAND-FELT temperature of the evaporator inlet pipe and the accumulator surface of an operating system will indicate a properly charged system.
3. Operation of the Heater and A/C Control selector (mode) lever to distribute air from the appropriate outlets indicate proper operation. The system will default to air flow in several modes if a vacuum system malfunction exists.