ML 350 (163.157) V6-3.7L (112.970) (2004)
Evaporator Temperature Sensor / Switch: Description and Operation
GF83.57-P-2106-02GH Icing Protection Temperature Sensor, Function
GF83.57-P-2106-02GH Icing Protection Temperature Sensor, Function
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with CODE (580) Air conditioning or Tempmatic for USA [MODELS 163 up to 31.8.01]
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with CODE (580a) Automatic air conditioning [MODELS 163 as of 1.9.01]
Function
The icing protection temperature sensor (R35) is located in the air flow behind the evaporator. It sends its resistance value depending upon the
temperature at the evaporator to the air conditioning control panel (S98) or AAC pushbutton control module (N22).
At an evaporator temperature of 1 to 3 degrees C the refrigerant compressor is switched off. This helps to prevent the evaporator from icing up. As a
result the outlet temperature fluctuates insignificantly at the nozzles.