How do you replace thermostat in 2008 Ford Escape 6cyl?

To replace the thermostat in a 2008 Ford Escape with a 6-cylinder engine, first ensure the engine is cool and disconnect the negative battery terminal. Drain the coolant from the radiator and remove the upper radiator hose connected to the thermostat housing. Unbolt the thermostat housing, replace the old thermostat with a new one, and ensure the gasket is in place. Reassemble everything in reverse order, refill the coolant, and check for leaks.