Timothy F Van Nuys , CA May 06, 2014 Appliance: Model 721 63659300 One lamp cover was broken and so i order a new pair Simply unscrew the single screw (Note: The new covers accomodate three screws, although on my appliance, only one is necessary.) and gently jiggle the cover until the plastic "tab" at the front end disengages from the slot into which it had been inserted. Insert the "tab" on the new cover into the same slot (Carefully!) and jiggle to allow the cover to rest snugly over the light reflector. Insert screw into center hole and tighten. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes