Close inspection led me to believe that the door seal had been compromised. After watching the video (which is of a unit the has the seal mounted on the door itself, and NOT the front of the box) I felt this project could be easily accomplished. All I needed was an tool to get the old seal unseated (a thin straight blade screwdriver) and a blunt rounded tool to seat the new one (i used the back end of an ordinary table knife). Took more time to find the tools than to do the job.