A/C Diagnostic Process

When a client presents an A/C concern, do the following procedure to identify the cause of the problem.

Confirm the type of concern.

• If a client complains about an A/C performance problem, go to step 2.
• If a client complains about an A/C noise problem, do the A/C system noise check .

2. Do the A/C system inspection - Refer to: A/C System Contamination Inspection  or A/C System Test  or A/C System Inspection  and repair any problems. If no problems are found, go to step 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.

• 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.

4. Do the refrigerant leak check  and repair any leaks. If no leaks are found, go to step 5.Evacuate and recharge the system  and do the A/C system test - Refer to: A/C System Contamination Inspection  or A/C System Test  or A/C System Inspection .

• 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.