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Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> Air Conditioning (Refrigerant R134A Servicing) (2 Of 2) >> 87 Air Conditioning >> A/C System, General Information >> Refrigerant Circuit, General Precautions >> Refrigerant Circuit, Cleaning

Refrigerant Circuit, Cleaning

Cleaning the refrigerant circuit with refrigerant R134a (flushing with refrigerant R134a). Refer to REFRIGERANT CIRCUIT, CLEANING (FLUSHING) WITH REFRIGERANT R134A . (Or blow out with compressed air and nitrogen). Refer to REFRIGERANT CIRCUIT, FLUSHING WITH COMPRESSED AIR AND NITROGEN . In the event of:

-- Moisture or dirt has gotten into the refrigerant circuit, for example, after a crash.

-- Refrigerant oil is dark and viscous.

-- There is too much refrigerant oil in the refrigerant circuit after replacing the compressor.

-- The A/C compressor had to be replaced due to "internal" damage (for example, noises or no output).

NOTE:

When flushing components with compressed air and nitrogen, extract the gas mixture escaping from the components thoroughly via an existing exhaust-extraction ventilation system (workshop extraction system).

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