Renewing receiver or reservoir and restrictor after cleaning refrigerant circuit — AUDI

🧭 Before you start

Fits: Audi A5 (8T, 2007–2016), Audi Q5 (8R, 2008–2017), Audi A2 (8Z), Audi A3 (8L, 1996–2003), Audi A4 B5 (8D), Audi A4 B6/B7 (8E), Audi A4 B9 (8W, 2015–), Audi R8 (4S, 2015–), Audi A5 Cabriolet (8F), Audi A6 C5 (4B), Audi A8 D2 (4D), Audi A8 D3 (4E, 2002–2010), Audi A3 (8P, 2003–2012), Audi A4 Cabriolet B6/B7 (8H), Audi TT Mk1 (8N), Audi A6 C6 (4F, 2004–2011), Audi A4 B8 (8K, 2007–2015), Audi Q7 (4L, 2005–2015), Audi A3 (8V, 2012–2020), Audi Q7 (4M, 2015–), Audi A8 D4 (4H, 2010–2017), Audi TT Mk2 (8J, 2006–2014), Audi A6/A7 C7 (4G, 2011–2018), Audi A1 (8X, 2010–2018), Audi Q3 (8U, 2011–2018); platform codes 8C, 4A, 8G, 85, FV, 42, 83, 84, 4X

• Opens: engine oil, refrigerant (A/C)
• Renewed: receiver or reservoir

Don't miss

• There are different versions of the oil drain plug and the corresponding seal (an O-ring or a sealing ring may be fitted, renew) and Electronic parts catalogue.
• Dispose of old refrigerant oil Audi ServiceNet, HSO Environmental Protection (observe local regulations).

📋 Procedure

1. Discharge refrigerant circuit.
2. Removing the air conditioner compressor Heating, air conditioning87Air conditioner compressor (vehicle-specific Workshop Manual).
3. Eliminate cause of fault.
4. Clean refrigerant circuit (flush with refrigerant R134a) .
5. Check expansion valve for dirt or corrosion and renew if necessary

6. Flush the old refrigerant oil out of the air conditioner compressor Flushing electrically driven air conditioner compressor (removing refrigerant oil).
7. Remove oil drain screw from air conditioner compressor. [Note: There are different versions of the oil drain plug and the corresponding seal (an O-ring or a sealing ring may be fitted, renew) and Electronic parts catalogue.]
8. To accelerate drainage of the refrigerant oil, crank the air conditioner compressor by way of the magnetic clutch plate for example.
9. Pour the old refrigerant oil out of the air conditioner compressor. [Note: Dispose of old refrigerant oil Audi ServiceNet, HSO Environmental Protection (observe local regulations).]
10. Then add the quantity of fresh refrigerant oil to the air conditioner compressor corresponding to the quantity of refrigerant oil in the replacement compressor (or the specified quantity of refrigerant oil on vehicles with two evaporators if applicable) . [Note: Use different refrigerant oils and quantities for the various air conditioner compressors .To ensure air conditioner compressor lubrication on start-up, at least 40 cm3 of refrigerant oil must be poured into the air conditioner compressor. The remainder can be added for example to the new reservoir or receiver .If dirt enters the air conditioner compressor whilst the refrigerant circuit is open (e.g. after an accident), the air conditioner compressor should be renewed.On vehicles with two evaporators, the quantity of refrigerant oil in the refrigerant circuit may be greater than the quantity in the replacement compressor. On such vehicles, add the extra quantity of refrigerant oil to the refrigerant circuit as necessary .]
11. Renew receiver or reservoir and restrictor Heating, air conditioning87Refrigerant circuit; System overview - refrigerant circuit (vehicle-specific Workshop Manual).
12. Assemble, evacuate and charge refrigerant circuit.

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