what is the temp the radiator fan turns on?
<answer> When the coolant temperature goes up beyond approximately 93 to 103 degrees Celsius, the radiator fan switch conducts to operate the radiator fan. <context> When the coolant temperature goes up beyond 93 ∼ 103 °C (199 ∼ 217 °F), the radiator fan switch conducts to operate the radiator fan. The radiator fan draws air through the radiator core when there is not sufficient air flow such as at low speeds. This increases up the cooling action of the radiator. When the temperature is below 85 ∼ 100 °C (185 ∼ 212 °F), the fan switch opens and the radiator fan stops. In this way, this system controls the engine temperature within narrow limits where the engine operates most efficiently even if the engine load varies.