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Home >> Audi >> 2019 >> A4 Premium >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> AIR CONDITIONING [R1234yf Servicing] (REFRIGERANT CIRCUIT) >> 87 Air Conditioning >> Working With A/C Service Station >> Refrigerant Circuit, Evacuating >> Notes

Refrigerant Circuit, Evacuating: Notes

The refrigerant circuit must be evacuated before it is filled with refrigerant (vacuum). Moisture is also extracted by this from the circuit.

Leaks may be found when evacuating the refrigerant circuit. Refer to LEAKS, FINDING .

CAUTION:

- Never start the engine with vacuum in the refrigerant circuit.