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

WARNING: This page is about a different car, the 2023 Volkswagen Arteon. However, it is still accessible from the selected car via links, so may be relevant.

Install in reverse order of removal and note the following:

-- Pay attention that the condensation water drain hose -3- is seated correctly.

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- The coding -2 and arrow- must line up with the heater and A/C unit -1-.

-- If a commercially available cable tie was used to secure the condensation water drain -3-, replace the cable tie.

-- Route the condensation water drain hose as shown underneath from the wiring harness of the Airbag Control Module -J234- -4-.

-- Coat the new seals with refrigerant oil before installing the refrigerant lines.

CAUTION:

There is a risk of damaging the A/C compressor if the refrigerant circuit is empty.

- Never start the engine with the refrigerant circuit empty.

Vehicles with Refrigerant R134a

-- Fill the refrigerant circuit. Refer to the appropriate Service Information .

-- Perform the leak test on the refrigerant circuit line connections that were closed again. Refer to the appropriate Service Information .

Vehicles with Refrigerant R1234yf

-- Charge the refrigerant circuit. Refer to REFRIGERANT CIRCUIT, CHARGING .

-- Perform the leak test on the closed line connections of the refrigerant circuit. Refer to LEAKS, FINDING .

Continuation for All Vehicles

-- Fill the coolant. Refer to COOLANT, DRAINING AND FILLING .

-- Check the heating and A/C system function.