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Home >> Audi >> 2020 >> A4 Prestige >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> Solar Ventilation >> AIR CONDITIONING (2 Of 3) >> 87 Air Conditioning >> Refrigerant Circuit >> Refrigerant Lines With Inner Heat EXCHANGER, Removing And Installing >> Removing

Refrigerant Lines With Inner Heat EXCHANGER, Removing And Installing: Removing

-- Switch off the ignition.

-- Discharge the refrigerant circuit. Refer to REFRIGERANT CIRCUIT, DISCHARGING WITH A/C SERVICE STATION [R134a] or REFRIGERANT CIRCUIT, DISCHARGING [R1234yf] .

-- Remove the left front wheel housing liner. Refer to FRONT WHEEL HOUSING LINER, REMOVING AND INSTALLING .

-- Remove the plenum chamber cover. Refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING .

NOTE:

To prevent water from running via intake shaft into the heater and A/C unit when plenum chamber cover is installed, plenum chamber cover must not be damaged. In addition the plenum chamber cover must engage correctly and completely in the plenum chamber cover. Refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING .

-- Remove the bolts -A-. Refer to OVERVIEW - A/C COMPRESSOR, CONDENSER AND UNDER FENDER  for the tightening specification.

GWWA87-12097Courtesy of AUDI OF AMERICA, LLC

-- Loosen the refrigerant lines -B and C- (in the area under the left headlamp) from the bracket -D- and remove from the refrigerant line with the inner heat exchanger -E-.

NOTE:

Seal open line connections at the connection point with clean plugs, for example from the Engine Bung Set :VAS6122  .

-- Remove the nut -A-. Refer to OVERVIEW - COMPONENTS UNDER FENDER AND IN PLENUM CHAMBER  for the tightening specification.

GWWA87-12098Courtesy of AUDI OF AMERICA, LLC

-- Loosen both refrigerant lines to the expansion valve -D and E- from the bracket -B- and remove from the inner heat exchanger -C-.

NOTE:

Seal open line connections at the connection point with clean plugs, for example from the Engine Bung Set :VAS6122  .

-- Loosen the inner heat exchanger -C- from the bracket -F-.

-- Loosen the catches -H- and push the grommet -G- in the direction under the fender.

-- Remove the bolts -B-. Refer to OVERVIEW - A/C COMPRESSOR, CONDENSER AND UNDER FENDER  for the tightening specification.

GWWA87-12099Courtesy of AUDI OF AMERICA, LLC

-- Loosen the inner heat exchanger -A- from the bracket -C- and remove.