Functional Test

Use the following CCOT "Hand-Feel" procedure if the A/C system has the proper charge of Refrigerant-12 (providing ambient temperature is above 21°C (70°F).
1. Engine must be warm and at normal idle speed.
2. Hood and body doors open.
3. Selector (mode) lever set at NORM.
4. Temperature lever at COLD.
5. Blower on HI.
6. "Hand-Feel" the temperature of the evaporator inlet pipe after the orifice and accumulator with the compressor engaged.
- Both the same temperature and somewhat cooler than ambient-Proper condition: check for other problems,System Performance Test
- Inlet pipe cooler than accumulator surface indicates a low refrigerant charge.