LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2015 >> WRX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Engine Cooling System (WRX-STI)) >> Radiator Fan System >> Inspection >> Operating Condition
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Operating Condition

WARNING: This page is about a different car, the 2013 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle speed A/C compressor load Engine coolant temperature
Increase: 89°C (192°F) or less Decrease: 87°C (189°F) or less Increase: 90 - 95°C (194 - 203°F) Decrease: 88 - 90°C (190 - 194°F) Increase: 96°C (205°F) or more Decrease: 91°C (196°F) or more
Radiator fan operation Radiator fan operation Radiator fan operation
During acceleration: 19 km/h (12 MPH) or less
During deceleration: 10 km/h (6 MPH) or less
OFF OFF Low-Speed High-Speed
Low Low-Speed Low-Speed High-Speed
High High-Speed High-Speed High-Speed
During acceleration: 20 - 69 km/h (12 - 43 MPH)
During deceleration: 11 - 64 km/h (7 - 40 MPH)
OFF OFF Low-Speed High-Speed
Low High-Speed High-Speed High-Speed
High High-Speed High-Speed High-Speed
During acceleration: 70 - 105 km/h (43 - 65 MPH)
During deceleration: 65 - 100 km/h (40 - 62 MPH)
OFF OFF Low-Speed High-Speed
Low High-Speed High-Speed High-Speed
High High-Speed High-Speed High-Speed
During acceleration: 106 km/h (66 MPH) or more
During deceleration: 101 km/h (63 MPH) or more
OFF OFF High-Speed High-Speed
Low High-Speed High-Speed High-Speed
High High-Speed High-Speed High-Speed