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Diode had burnt out
Take off top facing over microwave using screwdriver also protection plate for diode and capaitor. Disconnect diode from frame, bracket to capacitor then remove, disconnect wires leaving diode on capacitor for right connection, replace, rewire done.
Piece of cake. One screw to release the dropdown light diffuser. Just remember, the you're screwing the new bulb in from a reverse perspective. Also this site sends the correct part the first time.
Removed 2 screws from top of microwave. Place new grill in place. Replaced 2 screws that were removed. What was wonderful is I ordered the part around 3 pm on a Friday. The part arrived at 9AM the next day and that was without requesting special shipment.
Unscrewed the remaining pieces of bracket slipped in new vent cover and attached with the two screws. Very easy since the web site showed where the vent attached. I saved over $60.00 doing this repair myself!
I didn't have to remove the old cover since it cracked and fell off the microwave already. I simply snapped in the new vent cover, screwed in the 2 screws and I was done. Super easy.
I broke the grill b/c I thought it snapped on and off, not.
I removed the two screws and took off the old grill. Snapped the new grill in place and replaced the screws. This model was not shown on the list but the part fit just fine. The part arrived in 2 days! I ordered the white one and at first didn't think it matched .. maybe my microwave was bisque or almond .. but after 15 minutes of scrubbing I realized it was white but just real dirty .. lol. Now the door opens without the grill falling off. Easy fix.
Removed the microwave from above the oven by loosening the two screws above the microwave. As the unit tilted outward lifted up and the whole unit came out all the time feeding the power cord through the cutout for the power cord. After it was out removed the cover and identified the capacitor and made sure it was discharged and removed and replaced the diode. tested before reinstalling and it heated up just fine. Reversed order and reinstalled . Very easy job maybe a second hand to help fish the power cord when installing and removing.
Age-related concern: 13-year old filter had never been serviced.
Used a phillips screwdriver to remove 4 retaining screws located on the top leading edge of the unit, just above the door. Note the screws on the far left and far right are shorter than the middle two. After removing and cleaning the plastic vent, the small, square charcoal filter is revealed in the center, and is easily removed (noting its installation position first!). Take advantage of the opportunity to thoroughly clean the inside using a cloth soaked in degreaser before replacing the filter, the vent, and the 4 screws.
The close door warning kept coming on and the microwave would not run
Don't waste your time with other parts stores online. Partselect sells quality parts and they arrived 2 days early. I purchase a door switch from another online store and the switch was defective.
Really easy for a 75-year old female; just spent more time reading the online manual than actually installing the light bulbs to find out where to access the light bulbs.