Functional Test/Check

DESCRIPTION
The following "HAND-FEEL" procedure can be used to approximate whether or not the A/C system has the proper charge of Refrigerant-12 (providing air temperature is above 21°C (7O°F) on most models). This check can be made in a matter of minutes and may simplify system diagnosis by pinpointing the problem to the amount of R-12 charge in the system or by eliminating low charge possibility from the overall checkout.

OPERATION
1. Engine must be warm and at normal idle speed.
2. Hood and body doors open.
3. Selector (mode) button set at "NORM."
4. Temperature lever at full "COLD."
5. Blower on "HI."
6. "Hand-Feel" temperature of evaporator inlet pipe after orifice, and accumulator surface, with compressor engaged.

NOTE: Both the evaporator inlet pipe and the accumulator should be the same temperature and both should be some degree cooler than ambient temperature.

^ If the evaporator inlet pipe and the accumulator are not the same temperature, and both are not some degree cooler than ambient temperature, leak test vehicle.

- If leak is found, discharge system and repair as required. Evacuate and Recharge system.
- If no leak is found refer to Insufficient Cooling. Symptom Related Diagnostic Procedures