64 11 225 Replacing controller for heating and A/C system blower

Release screws (1) and feed out cover (2) towards bottom.

Fig 1: Identifying Cover Screws

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There are two controller versions for the heating and air conditioning system.

Version A.

Disconnect plug connection (1).

Turn controller (2) to left slightly and remove.

Fig 2: Removing Controller

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Installation: 

Marking (1) on controller must match up with marking (2) on heater.

Fig 3: Identifying Marking On Controller And Heater

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Version B.

Unfasten plug connection (1) and disconnect.

Fig 4: Identifying Plug Connection

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Release lock (1). Slide controller (2) upwards slightly and pull out of heating and air-conditioning unit (3).

Fig 5: Removing Heating And Air Conditioning Unit

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