Compressor HVAC: Service and Repair

A/C Compressor

Special tools, testers and auxiliary items required

• Torque Wrench (V.A.G 1331) (5 to 50 Nm)

• A/C Service Station (ROB 134APF)

• Flush the refrigerant circuit with R134a refrigerant under the following conditions:

• In the event of dirt or other contamination in the refrigerant circuit.

• If vacuum reading is not maintained on evacuating a leak-free refrigerant circuit (pressure build-up due to moisture in refrigerant circuit).

• If refrigerant circuit has been left open for longer than normal (for example, following an accident).

• If pressure and temperature measurements in the refrigerant circuit indicate the likelihood of moisture

• In the event of doubt about the amount of refrigerant oil in the circuit.

• The A/C compressor had to be replaced on account of internal damage for example, noise or no output).

The procedure for flushing with refrigerant R134a is described under Refrigerant Circuit and Components in => Refrigerant R134a Servicing.

For information regarding performing repairs on vehicles with air conditioning and working with refrigerant, refer to => Refrigerant R134a Servicing.

Information on tools for repairs in vehicles with climate control system can be found in => Refrigerant R134a Servicing Special Tools.

Removing

Danger due to refrigerant coming out under pressure.

Danger of frost bite to skin and other parts of the body.

• Extract the refrigerant and immediately open the refrigerant circuit after that.

• If the refrigerant was extracted more than 10 minutes in the past and the refrigerant circuit was not opened, extract the refrigerant again. Pressure in the refrigerant circuit is caused by evaporation.

- Extract refrigerant using (ROB 134APF) , only then open the refrigerant circuit. See notes, refer to => [ Components Outside of Passenger Compartment Component Location Overview ] Components Outside of Passenger Compartment Component Location Overview.

- Remove the noise insulation under the engine.

- Remove the ribbed belt.

- Disconnect the connector from the A/C compressor regulator valve (N280).

- Remove the bolts (22 Nm +/- 1 Nm) - 1 - from the A/C compressor and then disconnect the refrigerant pipes from the A/C compressor.

- Remove the hex bolts (25 Nm) - 2 - and the A/C compressor.






Installing

• Make sure alignment bushings - 3 - are seated correctly.

• Pay attention to notes for installing A/C compressor => [ A/C Compressor, Installation Information ] Description and Operation.

- Install in reverse order of removal.