How can you stop the cooling fan from operating permantly it comes on even if the engine is cold i have checked the relays but still no joy on a peugeot 306 1.4 xreg?

If the cooling fan on your Peugeot 306 is running continuously even when the engine is cold, it may be due to a faulty temperature sensor or a short circuit in the wiring. Check the engine coolant temperature sensor for proper function and replace it if needed. Additionally, inspect the wiring for any damage or shorts that could cause the fan to activate improperly. If the issue persists, the fan relay may still be malfunctioning, so consider replacing it as well.