64 51 590 Removing and installing/replacing evaporator

Remove heating element, refer to 64 11 207 REPLACING HEATER CORE .

Remove output stage/switch for blower of heater - A/C, refer to 64 11 228 REPLACING OUTPUT STAGE/SWITCH FOR HEATER - A/C SYSTEM BLOWER .

Fig 1: Disconnecting Plug Connection And Temperature Sensor

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Withdraw temperature sensor (1).

Disconnect plug connection (2).

Unclip linkage (3) on servodrive.

Fig 2: Removing Plug Connection

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Unlock servodrive (1), remove and disconnect plug connection.

Release screw (2).

Unlock plate (3) (see magnifying glass in Fig 2) and remove.

Installation: 

Insert lugs (4) first.

Unclip wiring harness.

Turn cam disk (1) until microswitch (2) can be unclipped and removed.

Fig 3: Identifying Microswitch

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Release screws on fan housing.

Lift off blower housing (1) and feed out double pipe (2).

Fig 4: Lifting Off Blower Housing

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Installation: 

Ensure correct cable routing.

Unclip retainers (1) and remove lower housing (2).

Fig 5: Removing Lower Housing

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Remove evaporator (1).

Fig 6: Removing Evaporator

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Replacement Only: 

Remove expansion valve (2), refer to 64 51 522 REMOVING AND INSTALLING OR REPLACING EXPANSION VALVE .