As a homeowner, you should reset the opener to prevent outsiders from opening the door with a remote that's set to a Liftmaster default code. A simple procedure allows you to reset the opener for one or more remotes.
doorsill - the sill of a door; a horizontal piece of wood or stone that forms the bottom of a doorway and offers support when passing through a doorway. doorstep, threshold. 1  doorway, room access, door, threshold - the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close; he stuck his head in the doorway.
Replacing a Sill and Threshold. This story shows how to replace a door sill and threshold. Intro. An exterior threshold takes a lot of abuse from foot traffic and weather, and it must be in good shape to keep the weather out.It can be replaced with a wood or metal threshold, either of which is available with a rubber gasket for sealing out the cold.eplacing a Sill and Threshold. This story shows how to replace a door sill and threshold. Intro. An exterior threshold takes a lot of abuse from foot traffic and weather, and it must be in good shape to keep the weather out.