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. Turn the temperature control knob to full cold.
5. Turn the blower speed to setting 4.
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.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 "Insufficient Cooling Diagnosis".