A/C Diagnostic Process
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When a customer presents an A/C concern, do the following procedure to identify the cause of the problem.
1. Confirm the type of concern.
- If a customer complains about an A/C performance problem, go to step 2.
- If a customer complains about an A/C noise problem, do the A/C system noise check .
2. Do the A/C system inspection and repair any problems. If no problems are found, go to step 3.
- If the refrigerant charge is within specifications, go to step 5.
- If the refrigerant charge is significantly under specifications, go to step 4.
- If the refrigerant charge is significantly over specifications, go to step 5.
3. Recover the refrigerant from the A/C system and measure the refrigerant charge from the A/C system using an A/C recover/recycle/recharge station.
4. Do the refrigerant leak check and repair any leaks. If no leaks are found, go to step 5.
5. Evacuate and recharge the system and do the A/C system test .
- If vent temperature or suction/discharge pressures are within specifications, the repair is confirmed and the A/C diagnostic process is complete.
- If vent temperature or suction/discharge pressures are not within specifications, a problem may still exist. Return to step 2, and recheck your test procedures.