A/C Diagnostic Process
HVAC
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 presents about A/C noise problem, do the A/C system noise check A/C System Noise Check.
* If a customer presents about A/C performance problem, go to step 2.
2. Do the A/C system inspection A/C System Inspection and repair any problems. If no problems are found, then go to step 3.
3. Recover the refrigerant from the A/C system A/C Refrigerant Recovery and measure the refrigerant charge from the A/C system using a recovery/recycling/charging station that meets SAE J2788 standards.
* If the refrigerant charge is within specifications, evacuate A/C System Evacuation and recharge the system A/C System Charging. 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 A/C System Evacuation and recharge the system A/C System Charging. Then go to step 7.
4. Do the A/C system test A/C System Test.
* 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 A/C 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 A/C System Evacuation and recharge the system A/C System Charging. Then go to step 7.
7. Do the A/C system test 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.