S4 V8-4.2L (BHF) (2004)
Compressor Control Valve Assembly: Description and Operation
Refrigerant Circuit Switches And Sensors And Related Connections
NOTE: Refer to vehicle-specific refrigerant circuit for switching pressures, switch removal/installation and switch layout/design Heating, air
conditioning or Air conditioning.
A/C Compressor Regulator Valve N280
The regulator valve is installed in the compressor. It is actuated by the A/C Control Head E87 or the Climatronic Control Module J255. The pressure on
the low pressure side is influenced by way of the regulator valve, thus regulating the temperature in the evaporator.
NOTE: The A/C Compressor Regulator Valve N280 is part of the compressor and cannot be replaced separately.