My Whirlpool microwave started arcing through the little plastic clip that holds the rack. It has burned a pin hole through it. Obviously I need to replace the clip. What causes the arcing? and if I replace it will it do it again?
Normally when there is an arcing issue it may be caused by paint chipping off the liner or the clip coming loose. Replacing the holder should correct the issue but you will also want to make sure that there is no bare metal showing. If there is you will want to clean the area, sand it down and using a microwave cavity paint, repaint the area.