The Academy's Professor Emeritus of all things Samsung (and LG, too, BTW), john63, expertly guides us thru the hand jive for replacing the door boot seal on a Samsung front load washing machine ...

Unplug washer

Remove 2 silver screws at the rear/back of the TOP COVER.

Slide the TOP COVER rearward about 2 inches and lift off

Remove DETERGENT DISPENSER DRAWER

Remove the FRONT CONTROL PANEL (pull top of panel towards you)

Open door and remove the SPRING/CLAMP from the DOOR GASKET (use a screwdriver to pry the spring located at the 6 o'clock location of the gasket). Peel the door gasket from the lip & leave loose.

Remove the 2 screws from the DOOR LOCK/SWITCH ASSY (let the door switch fall into the washer)

Remove the small access panel/cover from the PUMP STRAINER HOUSING (lower front of washer)

After removing the small access panel---there's a single screw that secures the plastic housing---remove that screw and pull out the plastic housing (leave the PUMP STRAINER in place)

Remove the screws from the top of the FRONT COVER/PANEL (entire front of the washer) and pull the FRONT COVER/PANEL towards you. Lift up slightly and remove.

Remove the tub COUNTER WEIGHTS

Remove the old GASKET

Re-install in reverse order.

NOTE:

Before installing the larger gasket CLAMP at the front of the washer---re-install the DOOR LOCK./SWITCH ASSY (2 screws).

You can buy the new door boot seal for your Samsung washer, as well as any other part you need, with a 365-day return policy ratcheer ==> http://www.repaircli...g-Machine-Parts

Source: WF448AAP/XAC Door seal replacement