M457B Microwave - Instructions

Husband replaced the bulb

Spouse just screwed in the new bulb and reinstalled the light cover plate with the two screws. Took under a minute. Works great.

Unplug the microwave. Then remove the six screws that hold the lower panel which has the light bulb cover and a couple of vent filters. The light bulb sockets are on a fixture that is connected by a quick connect electrical connector. Disconnect that and the whole panel is free to access the bulbs. My bulbs were very fragile and trying to twist them out resulted in the glass twisitng loose with the base still in the sockets. I needed to use a needle nose pliers to remove the bases and then I replaced the bulbs and put every thing back together

I found an exploded view diagram of of my microwave model which was very helpful. You need only remove outside metal skin by removing 4 screws on either side and 4 more on the back. Remove 4 plastic hole plugs from the top mounting inserts. Gently pull sides out and lift up and back to remove outer skin. The fuse is located on the back right corner behind the control panel. You access from the side. The fuse is under the spreader bar. Lift fuse up gently to remove.

P.S. It was the MSP Capaciter and or the interlock switch, snap apart 21A (19) failure that actually caused the ceramic fuse to blow.

llation

Last week I removed the glass cover that was held in by one screw and removed the burnt out light bulb. I ordered the bulb and left the glass cover off until the bulb arrived. I had to wait until this evening to put the glass cover back on and fasten the screw because I have a window right next to the oven and the sun streaming in made it too difficult for me to see how to put the glass back in and replace the screw.

thank you for the video--very clear, responsible, applicable although the illustration was not exactly of our kind of light. the bulb was exactly like the one Hotpoint used in its microwave made in 1989! I will come back to you for parts in the future. (You have the model # from my original order.)

Removed difuser (one screw), removed old bulb, screwed in new bulb, replaced difuser.

Ordered new support (price was less than Postage) Ordered for Microwave, should have ordered for Convection Microwave. Filed side SS to fit part ordered, after much filing got the new part (wrong) into the side panel. Looks great, wrong color but should be OK/

Simple. The parts came instantly. The glass was too big so I had it cut to size. I unscrewed the fixture with a screw driver replaced the bulb and slipped the glass cover into the frame and screwed the whole assembly in.

Unscrewed glass panel, removed old bulb, cleaned glass panel and installed new bulb. Screwed panel back into place.

Because of it's age and my memory of it's wall installation problems, I was extremely happy to find the parts. Merely popped the old "fried " support bracket out, snapped it the two replacement brackets and I was back in business with a "new" spark free appliance. Thanks ever so much! Smooth, "no brainer" installation! Extremely pleased with results!

remove cover, unplug secondary door switch (top switch)
remove switch from holder, install new switch, plug in wires, replace cover, very easy. door switches are a common problem
with microwave ovens.

Removed Cover Plate,
Removed back cover
Bulb disintegrated removed base with pliers
Screwed in new lamp
Replaced cover
Done

took out several screws dropped down the panel under the microwave and unscrewed the bulb and put the new one in. It was a simple job.