Passat Syncro Wagon V6-2.8L (ATQ) (2000)
Condenser Fan: Description and Operation
Coolant Fan Control
The Coolant Fan (V7) is primarily controlled by the following:
-
Coolant Fan Control (FC) Thermal Switch F18
-
Coolant Fan Control (FC) - A/C Relay J26 (Manual A/C)
-
Climatronic Control Module J255 (Climatronic)
-
Coolant Fan Control (FC) Control Module J293
-
A/C Pressure Switch F129 (via J293), if equipped
When A/C is off:
-
F18 switches the fans on to first speed when coolant temperature is within first stage switching temperature range.
-
F18 switches the fans on to second speed (via J293) when coolant temperature is within second stage switching temperature range.
When A/C is on:
-
J293 switches the fans on to first speed.
-
A/C Pressure Switch F129 switches the fan to the second speed (via J293) when refrigerant circuit pressure increases.
Coolant Fan Control (FC) Thermal Switch F18
Switching temperatures:
1st stage
On: 92 - 97 °C
Off: 84 - 91 °C
2nd stage
On: 99 - 105 °C
Off: 91 - 98 °C
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 Pressure Switch F129