Radiator Fan System: Inspection: Notes

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Operating condition:

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

Radiator fan speed related to engine coolant temperature

Fig 1: Radiator Fan Speed And Engine Coolant Temperature Characteristics Graph
Courtesy of SUBARU OF AMERICA, INC.
Radiator fan speed related to A/C compressor load

Fig 2: Radiator Fan Speed And A/C Compressor Load Characteristics Graph
Courtesy of SUBARU OF AMERICA, INC.