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Reasons for the BMW X3 Electric Fan Continuously Running at High Speed

1 Answers

McXavier

07/29/25 2:28pm

For the situation where the BMW X3 electric fan continuously runs at high speed, it is necessary to check whether the temperature sensor is functioning properly. Under normal circumstances, the fan will rotate for a period after the engine is turned off, but it should not run continuously. Reasons for the electric fan running continuously: Engine overheating due to insufficient coolant, causing the electric fan to run continuously; radiator leakage leading to engine overheating; loose or damaged hoses causing coolant leakage, resulting in continuous fan operation; thermostat failure causing the temperature to reach the threshold. Solutions: Check if the connector functions properly - whether there are any fitting issues - correct any deformed metal parts of the connector - secure the connector connection with insulating tape.

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