How do you replace the thermostate on a pergeout 206cc?

To replace the thermostat on a Peugeot 206 CC, first, ensure the engine is cool and disconnect the negative battery terminal. Drain the coolant and remove the upper radiator hose and any components obstructing access to the thermostat housing. Unscrew the thermostat housing, replace the old thermostat with a new one, making sure to align it correctly, and reassemble everything in the reverse order. Finally, refill the coolant, check for leaks, and run the engine to ensure proper operation.