A/C System Performance Test
A/C SYSTEM TESTSPERFORMANCE TEST
The performance test will help determine if the air conditioner system is operating within specifications.
CAUTION:
- Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat.
- Be careful when connecting service equipment.
- Do not breathe refrigerant or vapor.
If accidental system discharge occurs, ventilate work area before resuming service.
R-134a service equipment or vehicle air conditioning systems should not be pressure tested or leak tested with compressed air.
WARNING:
- Compressed air mixed with R-134a forms a combustible vapor.
- The vapor can burn or explode causing serious injury.
- Never use compressed air to pressure test R-134a service equipment or vehicle air conditioning systems.
Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.
1. Connect a R-134a refrigerant recover/recycling/charging station to the high-pressure service port and the low-pressure service port, following the equipment manufacturer 5 instructions.
2. Insert a thermometer in the center vent.
Determine the relative humidity and air temperature.
3. Test conditions
- Avoid direct sunlight.
- Open the hood.
- Open the front doors.
- Set the temperature control dial on MAX COOL, the mode control switch on VENT and the recirculation control switch on RECIRCULATE.
- Turn the A/C switch on and the fan switch on MAX.
- Run the engine at 1,500 rpm.
- No driver or passengers in vehicle.
4. After running the air conditioning for 10 minutes under the above test conditions, read the delivery temperature from the thermometer in the dash vent, the intake temperature near the blower unit behind the glove box and the high and low system pressure from the NC gauges.