Signs of burning on inside of plastic door surround .

Use a flat blade screw driver and pry out the inside plastic frame that surrounds the inner glass. It is just snapped in place.

HELLO.

THE SOLUTION ON HOW TO REPLACE THE BROKEN HANDLE

THINGS NEEDED.

Phillips screwdriver.
Thin, flat-head screwdriver.
Putty knife.
Replacement microwave door handle.

1 Examine the inside of the door. The handles of some early GE Spacemaker microwave models were attached after the two inner door panels were assembled to the outer door. If you see two recessed screws opposite the handle attaching points, undo them with a Phillips screwdriver and remove the handle. If not, go to the next step.

2 Insert the blade of a thin, flat-head screwdriver into the top, outer corner of the door, between the plastic inner frame and the outer door. Gently pry the inner frame out and slip a putty knife into the exposed opening on top of the door. Slide the putty knife toward the hinges to free the top of the inner frame; repeat on the front and bottom edges of the door and lift the inner frame out to expose a second metal inner frame.

3 Insert a thin, flat-head screwdriver into each of the small square openings on the top and bottom of the inner metal frame, starting at the handle end of the door. Undo the attaching clips by gently levering the inner door away, using the rim of the outer door as a fulcrum. Move the inner door away from the outer door on its hinges.

4 Remove the glass from the outer door. Undo the two screws holding the handle to the outer door with a Phillips screwdriver. Screw the replacement handle onto the door and tighten securely.

5 Replace the glass panel and reassemble the door by snapping the two inner frames back in place.

Thanks.

Mike,
Found the diagram HERE and HERE and also has a parts listing you can order.
Hope this helps with you project.

The inner door parts are part of the door assembly. It may be easier to order a complete door assembly from your local dealer. If you take the door off the machine the plastic covers come off and you will be left with the inside parts.

The door handle can easily be replaced on most microwave ovens by removing the inner door panel that goes around the perimeter of the glass. The following link explains how to access and replace the door handle:

http://www.fixya.com/support/r3696942-microwave_oven_door_handle_replacement

This should be a very simple repair that you can easily perform yourself.

If you have any questions, please post back and let me know. You can refer to this illustration, if you like, to assist you as well:

http://pcappliancerepair.com/model-display.php

I hope this helps you.

To replace the plastic handle on the KitchenAid KHMS155LSS-3 you pry open the door cover from the inside to release the upper tangs (~10). I used razor blades wedged between the tang point to hold them disengaged. Pull the front cover off the door starting from the handle end. Once the top edge is free, the bottom can be remover. See Pitcures.
Repeat the door cover removes with the handle attached from the front after you lift the tangs.

Buy a detector to test your microwave to be sure it is not leaking radiation. The detectors range in price from ten dollars to about thirty five dollars and can be purchased in most hardware stores. If you discover that the microwave is leaking radiation, never try to repair this appliance yourself. Take the microwave to a professional for repair. All things considered though, the microwave oven is fairly inexpensive these days it may be a better idea to just purchase a new one.

i have the same problem, there is a brown spot about 3 inch
by 2 inch at the bottom of the glass, I cannot clean it, it looks
like its in between the glass.

The handle can only be changed by separating the outer and inner shells of the door. You can pull the outer shell off the inner shell by removing the three screws at the end of the door and then using firm force to pull the shells apart. It helps to gently pry along the bottom, top and inside (nearest the hinges) with a thin flathead screwdriver or other very thin metal object. You don't have to get it all the way loose; just a little is fine. You can then use the two clasps on the back of the door (that hold it shut when it's closed) to pull with. I found that inserting a slim screwdriver into the lower clasp and using that as a handle (not a lever!) gives you a better grip. Hold the outer shell of the door with your left hand while pulling the inner shell in the opposite direction. Be carefull not to twist or bend the clasps; they are plastic and will break. The shells will pull apart and then you can access the screws that hold the handle. Change the handle then press the door shells back together. Make sure they are snug all around. Replace the three end screws and you're done.

OK, I'm no handy man and I just figured out how to do this. Open the door and remove the black plastic cover surrounding the inside glass. I used a regular flat head screw driver to pop this out.

Now I removed the 3 screws holding the inner panel against the glass on the front door. After removing the screws, the inner panel is held in place by a series of plastic clips. Go around the perimeter and pop the plastic clips out so the inner panel including the mesh comes out of the door.

Now you have complete access to clean the inside of the glass door!

I found it easier to do this operation with the door completely off the microwave, but you should be able to do this with the door in place too.