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What Causes the Electric Fan to Run at High Speed?

1 Answers

EvangelineDella

07/28/25 10:19am

The reasons for the high-speed operation of the electric fan are as follows: 1. Excessive water temperature: When the water temperature exceeds 100°, the electric fan operates at high speed. 2. Excessive transmission oil temperature: When the transmission oil temperature exceeds 120°, the electric fan operates at high speed. 3. Excessive air conditioning pressure: When the air conditioning pressure exceeds 20 Bar, the electric fan operates at high speed. Below is relevant information about the electric fan: 1. Thermoswitch control: The high and low speeds of the car fan are controlled by the thermoswitch (F18). This switch has two gears and is installed on the radiator to detect the water temperature. It sends the two-gear signal to J293, which then conducts different circuits to control the high and low speeds of the electric fan. 2. Operation method: The car fan is installed behind the radiator (on the side close to the engine compartment) and pulls air from the front of the radiator when turned on. However, some models have the fan installed in front of the radiator (on the outer side), blowing air toward the radiator when turned on. The fan starts and stops automatically based on the water temperature. At high speeds, the air pressure difference between the front and rear of the vehicle is sufficient to maintain the water temperature at a certain level, so the fan may not need to operate under these conditions.

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What is the reason for the ESP warning light in the Audi Q3?

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Is driving for 8 hours very tiring?

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Do Black Cars Get Particularly Hot in Summer?

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