Insufficient Cooling "Quick Check" Procedure

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 Pressure-Temperature Relationship of R-134A.
8. Leak check the system. Refer to Leak Testing Refrigerant System in 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 Pressure Test Chart (R-134A System).