KHMC1857BSS0 KitchenAid Microwave - Instructions

I ordered another one and placed it inside the microwave. It works and fits perfectly. I received the order exactly as scheduled.

PartSelect website indicated replacing the high voltage power supply diode is the solution for "no heat" 99% of the time, but the diode was OK. There is more info at the website concerning the case of "loud buzzing and no heat" indicating the magnetron needs to be replaced. As an electrical engineer with knowledge of microwave components, this was also my best guess. However, getting to the magnetron is not the easiest job, but it's not impossible. You also have to be careful to bleed off any charge stored on the high voltage power supply capacitor. Luckily, I found my KitchenAid service manual tucked away inside the unit since I couldn't find it online.

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

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

Used a philips head screwdriver to remove one screw holding the light cover. Pulled out the old bulb and inserted the new one. Replaced the cover.

Husband replaced the bulb

Cleaned the interior of my microwave, cleaned the new plate and simply added to the turn area.

Unscrew lens and direct access to surface light cavity. Removed old light bulbs and replaced with new bulbs. Reassembled lens cover and turned lights on successfully. Took less than ten minutes.

Looked up the Whirlpool Co. and ordered the part. It was quite simple. Arrived in 2 days and I simply placed it in the microware. It was very very easy!

E. Robinson

Based on other similar posted repairs, I purchased the bottom switch. Upon removing the control panel to replace the switch, I found the blue 22 gauge wire was broken at the spade terminal. This wire had been crimped to the terminal along with a 14 gauge wire. Apparently the force to crimp the thicker wire weakened the smaller wire at the terminal. I stripped the end of the small blue wire and reattached it to the thicker wire using a solder iron and solder. The repair fixed the problem.

Replaced a broken vent grill on my microwave

Changed out turntable motor

Opened door and put new plate in.

Placed order on Thursday evening and received Sat Am

Took out the turntable parts to ensure I ordered the correct cooking tray. Matching those with photos of related parts on PartSelect worked great. Put turntable drive and support ring in place and cooking tray went in very easily. Plan to order a second one to have on hand for this rental property.

Ordered the glass tray and installed it. Received the orderin about two days.