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Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning >> 87 Air Conditioning >> Refrigerant Circuit >> Desiccant Bag/Dryer Cartridge, Removing And Installing >> Removing

Desiccant Bag/Dryer Cartridge, Removing And Installing: Removing

-- Switch off the ignition.

-- Discharge the refrigerant circuit. Refer to Refrigerant Circuit or Working with A/C Service Station (1 Of 2) / Working with A/C Service Station (2 Of 2) .

-- Remove the lock carrier cover. Refer to Front Bumper .

-- On vehicles with an electric radiator shutter, remove it. Refer to RADIATOR SHUTTER, REMOVING AND INSTALLING .

-- If equipped, remove the bolts -arrows- and remove the air duct -1-.

GWWA23-11009Courtesy of AUDI OF AMERICA, LLC
GWWA87-12102Courtesy of AUDI OF AMERICA, LLC
CAUTION:

Danger or frostbite due to refrigerant coming out under pressure.

Frostbite on the skin and other parts of the body is possible.

- Wear safety gloves.

- Wear protective eyewear.

- Evacuate or drain refrigerant and open the refrigerant circuit immediately.

- If more than 10 minutes elapse after extracting or draining the refrigerant and the refrigerant circuit was not opened, extract or drain the refrigerant again. Pressure develops in the refrigerant circuit due to evaporation.

-- Remove the plug -A-.

-- Remove the desiccant bag from the condenser receiver/dryer -B-. Refer to OVERVIEW - CONDENSER .

-- Seal the open connection on receiver/dryer of the condenser with plug -A- (to prevent dirt and moisture from getting in).