System Performance Test

Pressure-Temperature Relationship Of R-134a:

System Performance Test:

Performance Test

Inspect
If a malfunction in the refrigerant system is suspected due to abnormal system pressures, inspect the following:
1. Outer surfaces of radiator and condenser cores. Make sure airflow is not blocked by dirt, leaves or other foreign material. Be sure to check between the condenser and radiator as well as the outer surfaces.
2. Evaporator core, condenser core, hoses, tubes, etc. for restrictions and kinks.
3. Refrigerant leaks.
4. All air ducts for leaks or restrictions. Low air flow rate may indicate a restricted evaporator core.
5. Compressor clutch for slippage.

6. Drive belt for improper tension. If the problem is not found, continue with diagnostic procedures.