How can I prevent the dome emitter from melting? Where can I get repair manual kbms1454rss-0?

Microwave are dangerous emitters of energy. To fix that you need a new door. Almost certainly that is an uneconomic repair. Also the burning was caused by uneven distribution of microwaves. Buy a new one.

More than likely the Magnetron (the microwave emitter) is burned out, unless this is a very very expensive Microwave the cost to repair will be close to the cost to replace. You will 1st need to have a small appliance repair center do an estimate to confirm my conclusion about5 the problem.

The cover has to come off the microwave to access the bulb. There are several screws around the back and sides. Remove these and the cover should lift off, revealing the bulb. For your own safety, make sure that the microwave has been unplugged from the outlet for several hours before attempting this repair.

Yes! in my view it is a serious, and you need to know what caused in the first place before repairs are carried out for safety reasons.

Nothing is wrong with the microwave, the plastic cover was either not microwave suitable or a splash of grease/oil/food was stuck to the plastic and melted it.

Hi, Sorry to tell you but Dont use this again you need to buy a new one or second hand one. Please leave me feed back: Malcolm Campbell, Thanks.

The back of the door will have a moulded surround that will be fixed with allen heads or small screws. Remove the inside cover of the door and you will see the holes for the handle.

Sounds like faulty house wiring to the unit.

If you need further help, reach me via phone at https://www.6ya.com/expert/gary_9c859f4aa7e5ab10

The plate MIGHT cover the waveguide that brings the microwave energy into the cooking cavity, This might be say an inch by two or three inches.

IF the plate has burned or discolored, then it may be carbonized and will continue to absorb the microwave energy and MAY cach fire.

You should service the unit and replace the part.

Running the microwave with too small a load in it can cause this and also if hot food/object touches the plate.