If you suspect a condition in the refrigerant system, inspect for the following conditions:

1. Inspect the outer surfaces of the radiator and the condenser cores to be sure that the airflow is not blocked by dirt, leaves, or other foreign material. Inspect between the condenser and the radiator, as well as all outer surfaces.
2. Inspect for restrictions or kinks in the condenser core, the hoses, and the pipes.
3. Test the operation of the blower fan.
4. Inspect all of the air ducts for leaks or restrictions. Low airflow rate may indicate a restricted evaporator core.
5. Inspect for slippage of the compressor clutch.
6. Inspect the drive belt tension.

Perform the following hand-feel procedure to get a quick idea of whether the A/C system has the proper charge of refrigerant R-134a. The air temperature must be above 21°C (70°F) for most models.

1. Warm up the engine. Run the engine at idle.
2. Open the hood and all the doors.
3. Set the A/C switch to the ON position.
4. Set the temperature control to the full cold position.
5. Set the blower speed switch on setting 4.
6. Hand-feel the temperature of the evaporator outlet pipe. The pipe should be cold.
7. Inspect for other problems. Refer to Testing the Refrigerant System.
8. Inspect leaks the system. Refer to Leak Testing . If you find a leak, discharge the system and repair the leak as required. After completing the repair, evacuate and charge the system.
9. If there is no leak, refer to Too Hot in Vehicle .