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

Install in the reverse order of removal while noting 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 Working with A/C Service Station .

-- Perform the leak test on the refrigerant circuit line connections that were closed again. Refer to Refrigerant Circuit, Detecting Leaks .

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.