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Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> A/C Compressor >> Air Conditioning >> 87 Air Conditioning >> Front Heater And A/C Unit >> Evaporator, Cleaning >> Evaporator In Heater And A/C Unit, Cleaning, With Suction Feed Spray Gun:VAG1538 And A Spray Lance >> Notes

Evaporator In Heater And A/C Unit, Cleaning, With Suction Feed Spray Gun:VAG1538 And A Spray Lance: Notes

Special tools and workshop equipment required 

On a vehicle without an A/C system (only with a heater) the evaporator installed in the heater does not function, it is only works a place holder and to reduce noise. If there are odors in the evaporator, it can be cleaned in the same way as an A/C system.

The recommended bend radius of the Suction Feed Spray Gun - Probe for Evaporator (Straight) VAG 1538/5 (short) or Suction Feed Spray Gun - Probe for Evaporator Cleaning, Curved VAG 1538/6 (middle length) -A- for this vehicle is shown.

GWWA87-11567Courtesy of AUDI OF AMERICA, LLC

TIP

The guide washer -B- is attached opposite of the spray lance holes -C-. This also allows the spray direction to be detected when the spray lance is inserted.