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Home >> Audi >> 2019 >> A3 Premium >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> A/C Compressor >> Air Conditioning (HVAC) [Convertible] (1 Of 2) >> 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

-- Discharge the refrigerant circuit. Refer to Refrigerant Circuit (Refrigerant R134a Servicing, Refrigerant Circuit, Working with A/C Service Station) or Working with A/C Service Station (1 Of 2) / Working with A/C Service Station (2 Of 2) .

Vehicles with 1.8L and 2.0L TFSI Engine:

Fig 1: Identifying Clamps With Air Guide Pipe
GWWA21-10818Courtesy of AUDI OF AMERICA, LLC

-- Loosen the hose clamps -1 and 2- and remove the air guide pipe.

Vehicles with 2.0L TDI Engine

GWWA21-10777Courtesy of AUDI OF AMERICA, LLC

-- Press the release buttons on the hose -1- for the crankcase ventilation and remove the hose from the cylinder head cover.

-- Free up the vacuum hoses at the air guide pipe -arrows-.

-- Loosen the hose clamp -3-.

-- Remove the bolt -2- and tilt the air guide pipe with the connection downward and remove it from the turbocharger.

Vehicles with a High Voltage System

-- Loosen the bracket -A- (for the High Voltage Battery Coolant Valve -N688-) from the plenum chamber bulkhead.

GWWA87-11596Courtesy of AUDI OF AMERICA, LLC

-- Loosen and carefully bend back the heat shield -B- in the area of the Heater and A/C Unit Refrigerant Shut-Off Valve -N541- -D- and the refrigerant line -F- (to the separating point on the right longitudinal member) from the plenum chamber bulkhead.

Continuation for All Vehicles:

GWWA45-10236Courtesy of AUDI OF AMERICA, LLC

-- If installed, release the catch in direction of -arrow- and remove the cover -1- to the left side.

-- Unclip the wiring guide.

-- Remove the spring nut -1 and 3-.

GWWA87-11328Courtesy of AUDI OF AMERICA, LLC

-- Fold the heat shield -2- as far forward as possible -arrow-.

GWWA87-11414Courtesy of AUDI OF AMERICA, LLC
WARNING:

Danger due to refrigerant coming out under pressure.

Danger of frost bite to skin and other parts of the body.

  • Evacuate the refrigerant and immediately open the refrigerant circuit afterward.
  • If more than 10 minutes have elapsed since evacuating the refrigerant and the refrigerant circuit was not opened, evacuate the refrigerant again. Pressure in the refrigerant circuit is caused by evaporation.

-- Remove the bolt -7-.

-- Disconnect the refrigerant line -6- with the inner heat exchanger from the expansion valve.

-- Remove the nuts -1 and 3- and the refrigerant lines -2 and 4-.

-- Remove the refrigerant line -5- with the inner heat exchanger to the right.

-- Seal the open lines and connections with clean plugs from the :VAS6122  .