Air conditioning coolant temperature sensor, function - GF83.40-P-2125-01P

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2007 Mercedes-Benz C350, 2007 Mercedes-Benz C280, 2007 Mercedes-Benz C230, 2006 Mercedes-Benz C55, and 2006 Mercedes-Benz C350. However, it is still accessible from the selected car via links, so may be relevant.

The coolant temperature sensor (B11/4) records the temperature of the coolant and passes on the value determined via the EIS [EZS] control unit (N73) and Controller Area Network bus class B (interior) (CAN-B) to the AAC [KLA] control and operating unit (N22) or to the comfort AAC [KLA] control and operating unit (N22/7) (for model 203).

At a coolant temperature of 117 to 127 °C the output of the refrigerant compressor (A9) is reduced linearly.

At temperatures above 127 °C the refrigerant compressor (A9) is shut off by the AAC [KLA] control and operating unit (N22) or comfort AAC [KLA] control and operating unit (N22/7) (in model 203) via CAN-B and front SAM control unit with fuse and relay module (N10/1) (in model 203) or the driver SAM control unit (in model 230). The coolant temperature sensor (B11/4) operates in a value range between -40 and +214 °C.