How to reset heater valve on Ford Focus?

To reset the heater valve on a Ford Focus, first, ensure the vehicle is turned off and the keys are removed from the ignition. Locate the heater control valve, usually found along the coolant hoses near the firewall. Disconnect the electrical connector and any hoses attached to the valve, then reconnect them to reset the valve. Finally, start the vehicle and test the heating system to ensure proper operation.