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.
Figure 2: Caulk is applied in three parallel lines running the width of the sill. Step 3: Prepare Door Unit. Remove all packaging materials such as nails, staples and screws. Step 4: Place Door in Rough Opening. Figure 6: Place the sill in the opening first and then tilt the door up into the opening. Figures 7 and 8: The exterior trim (brickmould) rests up against. exterior sheathing or slides into the opening of exterior brick. Stand on the outside of the doorway.