Warning: check your inside door lock handle plate screws to make sure there tight. Ours worked loose and the handle would not unlock the door to let us out. Inside screen door blocks access to the two screws on the edge side so that your unable to take them loose to remove the plate and give you the ability to move the latching mechanism. I had to go out the emergency window and open the door from the outside. I was able to reassemble the handle and plate so that the door closes and opens properly now.
At 74 yrs old its no fun climbing out the emergency window!