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.
Jamsill GuardÂ® is an adjustable sill pan flashing designed to prevent water damage from window and door leaks. Made from quality, high impact ABS plastics, Jamsill GuardÂ® will not deteriorate or corrode over time. Jamsill Guardâs simple design is inexpensive, easy to install, and more âuser friendlyâ than comparable products on the market.