Radiator Fan System: Inspection: Notes

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Operating condition:

Radiator fan operates depending on the radiator fan operation mode related to engine coolant temperature or the radiator fan operation mode related to A/C compressor load, whichever is higher as an operation mode.

Radiator fan operation mode related to engine coolant temperature

Fig 1: Engine Coolant Temperature Graph
Courtesy of SUBARU OF AMERICA, INC.
Radiator fan operation mode related to A/C compressor load

Fig 2: A/C Compressor Refrigerant Pressure Graph
Courtesy of SUBARU OF AMERICA, INC.