When Does the Vehicle Radiator Fan Turn On?

1 Answers
McGemma
07/30/25 9:37am
Vehicle radiator fans activate when the coolant in the radiator reaches a certain temperature, triggered by a thermal switch. When the coolant temperature rises further, this switch increases the fan speed. The radiator fan cannot be manually controlled as it is governed by the thermal switch mounted on the radiator. Radiator fan speed settings: 1. When coolant temperature reaches 92-95°C, the cooling fan operates at 1600 RPM - this is the low-speed setting; 2. When coolant temperature reaches 105°C, the fan accelerates to 2400 RPM - this is the high-speed setting.
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