In basic terms, an air conditioning system removes the hot, humid dirty air from the automobile's passenger compartment and replaces it with cool, dry, clean air. The process by which the system accomplishes this task is based on some very simple principles.

The system uses three basic components; a compressor, a condenser, and an evaporator. In addition, refrigerant, lubrication oil, interconnecting hoses, and some type of controlling device are utilized.

TUNEX AIR CONDITIONING CHECKLIST
1. Evaluation of past performance
2. Inspect condenser mountings
3. Inspect condenser for obstructions
4. Inspect cooling system
5. Check fan clutch and alignment
6. Inspect drive belts, idler pullery
7. Check system refrigerant oil
8. Inspect evaporator drains
9. Check receiver dehydrator
10. Check fittings and clamps
11. Check compressor drive clutch plate
12. Inspect electrical wiring
13. Check compressor mountings
14. Check expansion valve
15. Check mode select controls
16. Make ambient air temperature reading
17. Check high pressure gauge reading
18. Check low pressure gauge reading
19. Check sight glass for refrigerant level
20. Check outlet duct temperature
21. Leak test system