2005 Volkswagen Polo • 206,000 miles

My radiator fan continues to run long after my car has been switched off, infact it doesnt stop at all resulting in the battery being discharged. What might be the problem? Some say it might be the radiator fan switch, some say it might be the thermostat and some say the temperature sender. I am driving the 2005 polo 1.9tDI. Hope you will be able to assist me with this problem.
July 15, 2013.

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