Peugeot 308 cooling fan

There will be a temperature sensor somewhere which controls this function, possibly in the top of the radiator. Try unplugging this to see if the fan stops, if so the sensor needs replacing.

Take it the coolant level is o.k ? You can also get the fan running due to the particulate filter regenerating , especially if car used for short journeys .

Have you had a look at this similar problem: Cooling Fan

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Hi,my peugeot 308 2008 has the same problem,i unplugged the coolant sensor between battery and engine it is running non stop still,now i Keep getting error message for depollution and expansion water tank level too low.i had cleaned the sensor on the tank but error persists any suggestion would be appreciated.