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.
DOOR SILL as opposed to the term WINDOW SILL. OR DOOR STEP. A Soleplate is more correctly, the piece of timber (usually about 50mmthick) placed in the soil and beneath a timber or concrete Stump of a house. It is typically 200 x 300mm and made from Red Gum or Jarrah so that it lasts a long time in the damp ground.