Refrigerant pressure sensor

The refrigerant pressure sensor is electrically connected to the front electronic module (FEM).

The refrigerant pressure sensor for the heating and air conditioning system is fitted in the high pressure line between the capacitor and the evaporator. When cooling, the refrigerant pressure is monitored by the refrigerant pressure sensor and evaluated in the IHKA control unit.

Depending on the sensor signal, the A/C compressor is regulated and/or switched off by the IHKA control unit in the event of excessively high refrigerant pressure. Depending on the refrigerant pressure, a fan setting is determined through the IHKA control unit and transferred to the engine control unit on the bus.

Fig 1: Identifying Refrigerant Pressure Sensor And Pin Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

The refrigerant pressure sensor is supplied with 5 V and ground by the front electronic module (FEM).