A/C System Pressure -- Zone Classification
Step | Action | Value(s) | Yes | No | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Were you sent here from the Cooling Insufficient, A/C System diagnostic table? | -- | ||||||||||
2 | After performing the A/C System Performance Test, did both the high and low side pressures fall within zone B on the A/C Pressure-Zone Classification Chart but after continued operation of the A/C system, did the low and high side pressures equalize or become static ? | -- | ||||||||||
3 | Refer to the pressures recorded. Check for the following conditions:
Do the listed conditions exist ? | -- | ||||||||||
4 | Check for the following conditions:
Do the listed conditions exist ? | -- | ||||||||||
5 | The A/C compressor is malfunctioning. Replace the compressor. Refer to Air Conditioning Compressor Replacement Also replace the accumulator. Refer to Air Conditioning Accumulator Replacement Is the repair complete ? | -- | -- | |||||||||
6 | The A/C system has a low refrigerant charge. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging Is the repair complete ? | -- | -- | |||||||||
7 | Take readings of the low and high side pressures as well as the dash outlet air temperature after repairs are performed. Compare the pressures and outlet temperature to those listed in the A/C Performance Chart. Cooling Insufficient - Air Conditioning (A/C) System Are the readings within the specified ranges ? | -- | ||||||||||
8 | Operate the system in order to verify the repair Did you correct the condition ? | -- | System OK | Go to Symptoms in HVAC Systems - Manual |
