Were you sent here from the A/C System Performance Test?

Go to Step 2

Go to Air Conditioning (A/C) System Performance Test

Do 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, do the low and high side pressures equalize or become static ?

Go to Step 5

Go to Step 3

Refer to the recorded pressures.

Inspect for the following conditions:

Caution: Refer to Moving Parts and Hot Surfaces Caution in the Preface section.

Do the listed conditions exist ?

Go to Step 11

Go to Step 4

Refer to the recorded pressures.

Inspect for the following conditions:

Do the listed conditions exist ?

Go to Step 5

Go to Air Conditioning (A/C) System Performance Test

The A/C compressor is malfunctioning.

Remove the expansion device and inspect for contamination. Refer to Expansion (Orifice) Tube Replacement .

Are there metal flakes on the expansion device?

Go to Step 7

Go to Step 6

Inspect the expansion device for a brown powdery residue.

Is there a brown powdery residue present?

Go to Step 9

Go to Step 10

1. Remove the refrigerant lines at the compressor. Refer to Compressor Hose Assembly Replacement .
2. Inspect for metal flake contamination at the line connections and the compressor ports.

Is there metal flake contamination present?

Go to Step 8

Go to Step 8

1. Replace A/C Compressor. Refer to Air Conditioning Compressor Replacement .
2. Replace the orifice tube. Refer to Expansion (Orifice) Tube Replacement .
3. Evacuate and Recharge the A/C System. Refer to Refrigerant Recovery and Recharging .

Is the repair complete?

Go to Step 12

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1. Flush the A/C System. Refer to the J 43600 Operation Manual .
2. Replace the orifice tube. Refer to Expansion (Orifice) Tube Replacement .
3. Replace the A/C Compressor. Refer to Air Conditioning Compressor Replacement .
4. Replace the Accumulator. Refer to Air Conditioning Accumulator Replacement .
5. Evacuate and Recharge the A/C System. Refer to Refrigerant Recovery and Recharging .

Is the repair complete?

Go to Step 12

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1. Replace the A/C Compressor. Refer to Air Conditioning Compressor Replacement .
2. Evacuate and Recharge the A/C System. Refer to Refrigerant Recovery and Recharging .

Is the repair complete?

Go to Step 12

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The A/C system has a low refrigerant charge. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging

Is the procedure complete ?

Go to Step 12

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Take readings of the low and high side pressures as well as the IP outlet air temperature after repairs are performed.

Compare the pressures and outlet temperature to those listed in the A/C Performance Chart. Refer to Air Conditioning (A/C) System Performance Test

Are the readings within the specified ranges ?

Go to Step 13

Go to Air Conditioning (A/C) System Performance Test

Operate the system in order to verify the repair

Did you correct the condition ?

System OK

Go to Symptoms - HVAC Systems - Manual or Symptoms - HVAC Systems - Automatic