Blower motor function - GF83.10-P-2170-01GI

Function 

The AAC push-button control module (N22) passes a control voltage of 0-6 V to the blower regulator (A32n1) via the AC bus. Depending on the control voltage which is present, this then regulates the blower motor (A32m1) operating voltage of 0-12 V. This facilitates blower speed control of 0-100 %.

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

• Blower power setting manual or AUTO
• Operating functions:

  Air distribution

  AC OFF mode

  Residual engine heat mode (actuation limited to 5 V)

• Mode status (heating, cooling)
• Coolant temperature
• Vehicle speed
• Fresh air/recirculation flap setting
• Flap positions
• Terminal 15 (blower ON), starter running (blower OFF)