Evaporator Core: Service and Repair

64 51 590 - Removing and installing/replacing evaporator

Note:
The heater/Housing Assembly HVAC is removed. Please refer to Vehicle/ Heating and Air Conditioning / Housing Assembly HVAC

Necessary preliminary tasks:
- Remove evaporator temperature sensor. Please refer to Vehicle/ Heating and Air Conditioning/ Evaporator Temperature Sensor / Switch

Unfasten plug connection (1) and disconnect.
Remove wiring harness (2) from air intake duct.

IHKA only:
Remove servodrive for temperature control Replacing Servodrive for Temperature Control (IHKA).
Release screws (1).
Release clip (2).
Remove air intake duct (3).

Unfasten plug connection (1) and disconnect.
Disconnect plug (2) for heater wiring harness from housing.

Disengage air distribution actuating rod (1) from flap control (3).
Disengage air distribution actuating rod (2) from flap control (3).

IHKA only:
Detach plug connection (1) from servomotor/air distribution.
Detach wiring harness (2) from clip.
Release screws (3).

Release screws (1).

Note:
For purposes of clarity, illustration shows heat exchanger removed.

Raise upper half of housing to expose connecting rod/air flap (1).

Disengage connecting rod from air flap (2).

Remove evaporator (1) from lower half of housing (2).
Replacement:
Remove expansion valve from evaporator (1) Service and Repair.