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What is the normal coolant temperature for an Audi A4?

1 Answers

SanChase

07/29/25 8:14pm

Audi A4 coolant temperatures may vary depending on the model. The temperature range for low-speed fan operation is 92 to 95 degrees Celsius, while for high-speed operation it's 102 to 105 degrees Celsius. Determining factors: The operation of a car's radiator fan is governed by two factors. Under normal circumstances, the radiator fan is controlled by the engine and the coolant temperature within the radiator. When the engine coolant reaches a certain temperature threshold, the radiator fan activates to cool the radiator, and stops once the coolant temperature decreases. Air conditioning: When the air conditioning is in use, the radiator fan will operate. This is because the AC condenser requires fan-assisted cooling, during which the radiator fan runs at low speed. If the engine coolant temperature rises further and requires additional cooling, the radiator fan switches to high-speed operation, resulting in noticeably higher rotation speed and noise compared to low-speed mode.

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