Electrical Components Not Installed on the Refrigerant Circuit

Electrical Components Not Installed On The Refrigerant Circuit

A/C Programmer J127







This programmer switches the refrigerant flow direction through the 2nd evaporator if the temperature on the cooling fins on the 2nd evaporator lowers to the freezing point for water (icing protection).

Coolant FC (Fan Control) Control Module J293

NOTE: Available in different construction styles, some separate some installed on radiator fan.







This control module switches on and off the A/C clutch and therefore the A/C compressor. It switches the coolant fan and calculates the pressure in the refrigerant circuit on vehicles with High Pressure Sensor G65 or A/C Pressure/temperature Sensor G395.

A/C Evaporator Temperature Switch E33







Function:
The A/C Evaporator Temperature Switch E33 determines the temperature between the evaporator cooling fans. It prevents the possibility of ice building up between the evaporator cooling fans because the current entry to the condenser magnetic clutch is interrupted when the temperature on the cooling fins lowers to the freezing point for humidity.

The insertion depth of the feeler tube is marked or indicated.

NOTE: Installed in VW vehicles with A/C compressor drive via ribbed belt

Evaporator Vent Temperature Sensor G263 or Evaporator Temperature Sensor G308







Function:
The Evaporator Vent Temperature Sensor G263 or Evaporator Temperature Sensor G308 determines the temperature behind the evaporator. This value goes to the air conditioning control module and serves as a reference signal for regulating the A/C compressor. This prevents the evaporator from icing up.