Refrigerant Lines In Plenum Chamber, Removing And Installing: Installing

Install in reverse order of removal and Note The Following: 

-- Replace all O-ring seals (-E and F- in this illustration) there are different versions.

-- Always clean the expansion valve, pass-through, and refrigerant lines on the connection area and check them for damage.

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

-- Replace all O-ring seals (-E and G- in this illustration) there are different versions.

Courtesy of AUDI OF AMERICA, LLC

-- Insert both refrigerant lines -C and D- to the heat exchanger after installing the inner heat exchanger -F- and service connections -B and H- in the bracket.

-- Tighten the nut -A-.

-- 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.

-- Reinstall the removed components in the reverse order and reattach detached 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] .

-- Switch the ignition on.

-- 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 .