How to change a thermostat on a 1994 Dodge colt?

To change the thermostat on a 1994 Dodge Colt, first ensure the engine is cool, then drain the coolant from the radiator. Remove the upper radiator hose from the thermostat housing and take out the bolts securing the housing. Replace the old thermostat with a new one, ensuring the gasket is in place, then reassemble everything by reversing the steps. Finally, refill the coolant and check for leaks.