How do you replace the thermostat on a 2002 Honda CR-V?

To replace the thermostat on a 2002 Honda CR-V, first, ensure the engine is cool and disconnect the negative battery terminal. Drain the coolant and remove the upper radiator hose connected to the thermostat housing. Unbolt the thermostat housing, remove the old thermostat, and clean the mating surfaces. Install the new thermostat, reattach the housing, reconnect the hose, refill the coolant, and start the engine to check for leaks.