Blower, function - GF83.10-P-2102-02T

WARNING: This page is about a different car, the 2009 Mercedes-Benz E350 and 2008 Mercedes-Benz E350. However, it is still accessible from the selected car via links, so may be relevant.

Function

The AAC [KLA] control and operating unit (N22) or comfort automatic air conditioning (N22/7) passes on a control voltage of 0 % to 100 % to the blower regulator (A32n1) via climate bus 1. Depending on the control voltage applied this then regulates the operating voltage for the blower motor (A32m1). This achieves a control of blower speed from 0 % to 100 %.

The blower regulator (operating voltage) is influenced by the following factors:

Blower output adjustment (AUTO/manual)
Operating functions (AC OFF, REST, air distribution)
Mode status (heating, cooling)
Intensity of sun
coolant temperature
Vehicle speed
Outside temperature
Humidity
Fresh air/recirculated air flap setting
Position of activated carbon filter flap
Flap positions
Terminal 15 (blower ON), starter running (blower OFF)

Manual blower stages:

Stage 1 10% blower capacity

Stage 2 18% blower capacity

Stage 3 25% blower capacity

Stage 4 32% blower capacity

Stage 5 40% blower capacity

Stage 6 52% blower capacity

Stage 7 65% blower capacity

Stage 8 80% blower capacity

Stage 9 100% blower capacity

Automatic stages with automatic air conditioning

The blower output is controlled via a blower characteristic.

Automatic stages with comfort automatic air conditioning

The blower capacity is controlled via nine blower characteristics.