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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 >> Expansion Valve, Removing And Installing >> Refrigerant Lines, Disconnecting From Front Expansion Valve And Reconnecting >> Installing

Refrigerant Lines, Disconnecting From Front Expansion Valve And Reconnecting: Installing

Install in reverse order of removal and Note The Following: 

-- Check the support ring -G- for proper installation position and check the grommet in the plenum chamber rear panel for damage and proper installation.

-- Thoroughly clean all connections in expansion valve -D- and at refrigerant lines -B and C- and check for damage.

-- Replace the O-ring seals -E and F-. Refer to the Parts Information for the correct version.

NOTE:

Follow the instructions for installing the O-rings. Refer to REFRIGERANT CIRCUIT SEALS .

-- Coat the O-ring seals lightly with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .

-- Make sure the O-ring seals fit properly inside the grooves in the connections of refrigerant lines -B and C-.

-- Tighten the nut -A- for the refrigerant lines -B and C-.

-- Check the routing of the refrigerant lines after attachment. They must be inserted in the provided brackets in a tension-free manner and must not come in contact with other components.

-- Evacuate and fill the refrigerant circuit. Refer to REFRIGERANT CIRCUIT, EVACUATING WITH A/C SERVICE STATION [R134a] /REFRIGERANT CIRCUIT, CHARGING WITH A/C SERVICE STATION [R134a] or REFRIGERANT CIRCUIT, EVACUATING [R1234yf] / REFRIGERANT CIRCUIT, CHARGING [R1234yf] .

-- Install the remaining removed components.

-- Retrieve the Front A/C Display Control Head -E87- DTC memory and if necessary delete the displayed error using the Vehicle Diagnostic Tester in the "Guided Fault Finding"  function.

-- Operate the A/C system after charging the refrigerant circuit. Refer to A/C SYSTEM, STARTING AFTER CHARGING REFRIGERANT CIRCUIT .

NOTE:

Read the information for starting the A/C system after filling. Refer to A/C SYSTEM, GENERAL INFORMATION or A/C SYSTEM, OPERATING AFTER CHARGING [R1234yf] .