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Home >> Mercedes Benz >> 2000 >> ML430 >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control -- 163 Chassis >> Basic Knowledge >> Auxiliary fan, function - GF83.40-P-2115-01GH

Auxiliary fan, function - GF83.40-P-2115-01GH

Function 

Depending on the refrigerant pressure and/or the coolant temperature the left auxiliary fan (M4m1), right auxiliary fan (M4m2) are actuated.

The all-activity module (AAM) (N10) receives the coolant temperature from the coolant temperature sensor and the refrigerant pressure from the refrigerant pressure sensor (B12).

The all-activity module (AAM) (N10) compares this input information with stored values and actuates the left auxiliary fan (M4m1), right auxiliary fan (M4m2).

When the following values are indicated the left auxiliary fan (M4m1), right auxiliary fan (M4m2) are switched on or off: