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Home >> Audi >> 2023 >> e-tron Quattro Premium Plus >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning (Heating, Ventilation And Air Conditioning - Actuators - Air Ionization) >> 87 Air Conditioning >> Front Heater And A/C Unit >> Heater And A/C Unit, Removing And Installing >> Installing

Heater And A/C Unit, Removing And Installing: Installing

Install in the reverse order of removal while noting the following:

-- Coat the grommet -B and C- with grease and install it in the plenum chamber rear panel -A-.

GWWA87-11921Courtesy of AUDI OF AMERICA, LLC

-- Insert the support ring -D- in the grommet.

-- Check the position of the coolant and refrigerant lines in both grommets in the plenum chamber rear panel, and if necessary, align the heater and A/C unit so that the lines are not tensioned in the grommets.

-- Attach the refrigerant line to the front expansion valve. Refer to EXPANSION VALVE, REMOVING AND INSTALLING .

-- Connect the coolant hoses -A and B- to the heater core coolant pipes (pay attention to the marking) and secure them with a clamp.

GWWA87-12531Courtesy of AUDI OF AMERICA, LLC

-- Before starting the A/C system, fill and drain the coolant circuit. Refer to FILLING AND BLEEDING THE COOLANT .

-- Switch the ignition on.

-- Then perform the basic setting for the actuators.

Procedure 

-- Connect the Vehicle Diagnostic Tester .

-- Select the Diagnostic  mode and start the diagnosis.

-- Select the Test plan  tab.

-- Select the Select individual test  button and select the following tree structure consecutively: