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The 2009 Ford Focus has its thermostat positioned at the junction of the upper radiator hose. This essential component acts as a valve in the cooling system of your vehicle. Its main function is to control the flow of coolant circulating back into the engine and the amount that gets cooled by the radiator before being recirculated. Proper timing of the thermostat opening and closing is crucial for maintaining the right engine temperature. If the thermostat gets stuck in the closed position, it prevents coolant from passing through the radiator and returning to the engine, resulting in dangerously high engine temperatures.
How about up at the top of the engine?
In the 2009 Ford Focus, you can find the thermostat positioned at the top of the engine.