Replace this screw from inside. Miele speed/combination Owen.

[John333]

I have a Miele H5040BM combination Owen. Its sparking at the nut that holds the Grill to the roof of the microwave. This nut is getting red hot when the Microwave is on. Any help welcome.

Tried to tighten these nuts ( see blueprint nr 19,20 ) , but since the screw (17) that the nuts are screwed on rotates, the nuts won't tighten. How is this fixed? Why is it getting glowing hot red? The outer nut, turned out to be very corroded. Is that a reason they absorbed energy and became glowing? How do you access nr 18 from inside?

[Vance R]

Can't find an exploded view of the parts. If part number 18 is a nut may have to pull some panels to access. Probably need to remove stud #17, washer #19 and nut #20. Then remove any corrosion from the cavity, stud. washer and nut. Then reinstall all parts.  Since the stud spins freely it is not grounded to the cavity is my guess.