It is a fiddly job but with a little patience anyonyone with moderate DIY skills can change a door seal.
The seal folds into a lip at both the front and back. It is secured at the front with a wire band in a loop and at the back with an adjustable wire band.
Open the door and and pull the seal off the casing. Use a rolling action to get it over the lip. Now push the floppy seal inside the drum to gain better access to the internal adjustable wire band. Using a flat headed screwdriver loosen the wire band and remove the seal.
Fitting the new seal is the reverse of the procedure and requires some patience to fit it back on the lip. Allow about an hour to complete. Watch when you are fitting the adjustable band that the adjusting screw is towards you otherwise it will foul against the drum.
ian, February 2006