Insufficient Cooling "Quick Check" Procedure

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

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