Removing and installing mechanically driven air conditioner compressor — AUDI

🧭 Before you start

Fits: Audi A3 (8V, 2012–2020); platform code 85

📋 Procedure

1. ⚠ Danger from escaping pressurised refrigerant.Frostbite on skin and other parts of the body.Extract the refrigerant and then immediately open up the refrigerant circuit.Extract the refrigerant again if more than 10 minutes have passed since the initial extraction and the refrigerant circuit has not been opened up. Renewed evaporation leads to the build-up of pressure in the refrigerant circuit. — Remove radiator cowl 19Radiator/radiator fans; Removing and installing radiator cowl.
2. Detach refrigerant lines from air conditioner compressor .
3. Vehicles with air hose: Release hose clips (1 and 2) and remove air hose.
4. After removing air hose, seal off open lines and connections with clean plugs from engine bung setVAS 6122.
5. Remove poly V-belt 13Cylinder block (pulley end); Removing and installing poly V-belt.

6. Unplug electrical connector (2) at air conditioner compressor regulating valve N280.
7. Unscrew bolts (arrows) and detach air conditioner compressor (1).
8. Thoroughly clean contact surfaces on air conditioner compressor and bracket.
9. Insert dowel sleeves (arrows) in air conditioner compressor. [Note: Make sure that the dowel sleeves are positioned correctly and that the contact surfaces are clean. Incorrectly fitted dowel sleeves or dirty/damaged contact surfaces could lead to misalignment between the air conditioner compressor and the engine. After a period of operation, misalignment will cause damage to the air conditioner compressor.If the air conditioner compressor is renewed due to specific problems (e.g. internal damage), the refrigerant circuit must be cleaned Air conditioner with refrigerant R134a87Refrigerant circuit (Air conditioner with refrigerant R134a; Refrigerant circuit; Working with the air conditioner service station).When it is removed, the air conditioner compressor contains an indeterminate amount of refrigerant oil. For this reason it is important to observe the notes on renewing the compressor Air conditioner with refrigerant R134a87Renewing components of refrigerant circuit.]
10. ⚠ Risk of damage to air conditioner compressor.Depending on the position in which the air conditioner compressor is stored, refrigerant oil may accumulate in the compression chamber of the removed compressor.To prevent damage to the air conditioner compressor when starting it up for the first time, turn the air conditioner compressor 10 times by hand before fitting the poly V-belt (after installing a new air conditioner compressor or adding fresh refrigerant oil). — Evacuate and charge refrigerant circuit Air conditioner with refrigerant R134a87Refrigerant circuit (Air conditioner with refrigerant R134a; Refrigerant circuit; Working with air conditioner service station).
11. Start up air conditioner after charging refrigerant circuit .
12. As a final step, interrogate event memory and erase any entries displayed ("“Guided Fault Finding”").
13. Observe notes on starting up air conditioner after installing air conditioner compressor (before using air conditioner after system has been re-charged) Air conditioner with refrigerant R134a87General notes on air conditioning systems.

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• Calibrating matrix LED headlights with headlight adjustment unit VAS 621001
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