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Home >> BMW >> 2015 >> M235i 2D Convertible, Automatic Trans >> Repair and Diagnosis >> General Information >> OEM General Information >> Functional Description - 2-Series (F22) - Charging System, Anti-Theft System, Body Electrical System, HVAC System >> HVAC System - Functional Description >> Climate control >> Brief component description >> Stratification control wheel

Stratification control wheel

Two stratification controls are fitted for the IHKA:

The selected potentiometer setting is implemented on the flap position of each flap motor.

The signals from the stratification controls are sent to the IHKA control unit via 2 signal lines. The IHKA control unit evaluates the information and activates the flap motors.

The stratification controls have a liner resistance value determined by the angle of rotation. The limit-position switches are switched on and off mechanically via eccentric washers. Using the limit-position switch, the following ventilation flap positions in the ventilation grille are recorded:

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