A/C Diagnostic Process
When a customer presents 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 the A/C noise problem, do the A/C system noise check .
- If a customer complains about the A/C performance problem, go to step 2.
2. Do the A/C system inspection - Refer to: A/C System Inspection A/C System Contamination Inspection and repair any problems. If no problems are found, then go to step 3.
3. Recover the refrigerant from the A/C system and measure the refrigerant charge from the A/C system using a recovery/recycling/charging station.
- If the refrigerant charge is within specifications, evacuate and recharge the system . Then go to step 4.
- If the refrigerant charge is significantly under specifications, then go to step 5.
- If the refrigerant charge is significantly over specifications, evacuate and recharge the system . Then go to step 7.
- If vent temperature or suction/discharge pressures are not within specifications, diagnose and repair the A/C system as needed. Then go to step 6.
- If no problems are found, the A/C system is operating as designed and the A/C diagnostic process is complete.
5. Do the refrigerant leak check .
- If any leaks are found, repair the A/C system as needed. Then go to step 6.
- If no leaks are found, go to step 7.
6. Evacuate and recharge the system . Then go to step 7.
7. Do the A/C system test to confirm your repairs.
- 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 1 and recheck your test procedures.