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Will the Fan Run if the Water Temperature Sensor is Broken?

1 Answers

MaxLee

07/29/25 3:53pm

It depends on the vehicle model. Some models have electronically controlled fans that are managed by the computer. If the water temperature sensor is damaged, the ECU cannot determine the temperature, causing the fan to either stop running or run continuously. However, some models have fans that are not controlled by the computer, so even if the water temperature sensor is damaged, the fan remains unaffected. Below is some relevant information about the water temperature sensor: 1. The water temperature sensor is a device that converts the temperature of the coolant into an electrical signal, which then adjusts the corresponding control unit. Inside the car's water temperature sensor, the resistance increases as the temperature decreases and decreases as the temperature rises. The water temperature sensor is installed in the engine block or cylinder head's water jacket, in direct contact with the coolant, to measure the engine's coolant temperature. 2. The primary function of the water temperature sensor is to drive changes in the temperature gauge by altering the current flow through resistance changes, indirectly indicating the engine's operating temperature.

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