At approximately what temperature does the car's cooling fan start operating?

1 Answers
Saul
07/29/25 1:19pm
Car's cooling fan typically starts operating when the coolant temperature reaches around 90 degrees Celsius, though this threshold varies across different vehicle models. The fan operates at low speed when the temperature is between 92°C to 95°C, and switches to high speed between 102°C to 105°C. When the air conditioning system is in use, the radiator fan will also activate since the AC condenser requires fan-assisted cooling - in this scenario, the fan runs at low speed. When engine coolant temperature rises and requires additional cooling, the radiator fan will engage high-speed operation mode, resulting in noticeably higher fan rotation speed and noise compared to low-speed mode.
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