Initial Inspection and Diagnostic Overview

A/C System Performance Table:

If a malfunction is suspected due to abnormal system pressures, inspect the following:

1. Outer surfaces of radiator and condenser cores to make sure airflow is not blocked by dirt, leaves, or other foreign material. Make sure to check between the condenser and radiator as well as the outer surfaces.
2. Evaporator core, condenser core, hoses, tubes, etc., for restrictions or kinks.
3. Refrigerant leaks.
4. Air ducts for leaks or restrictions. A low airflow rate may indicate a restricted evaporator core.
5. Compressor clutch for slippage.
6. Drive belt for improper tension.
7. Accumulator for plugging.
8. Expansion (orifice) tube for plugging. If the problem is not found, continue with the diagnostic procedures for the system.