Fitment: 2006-2011 Ford Explorer 2007-2010 Ford Explorer Sport Trac 2006-2010 Mercury Mountaineer What is a Fan Clutch? A fan clutch is a thermostatic engine cooling fan that can freewheel at low temperatures when cooling is not needed, allowing the engine to warm up faster, relieving unnecessary load on the engine. As temperatures increase, the clutch engages so that the fan is driven by engine power and moves air to cool the engine. .
