Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISENGINE MECHANICALCOOLING SYSTEM (MECHANICAL)ENGINE COOLING SYSTEM (H4DO)RADIATOR FAN SYSTEMINSPECTIONNOTES

2016 Subaru Legacy 2.5i

Radiator Fan System: Inspection: Notes

2016 Subaru Legacy 2.5iSECTION Notes

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.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.