KMHS120ESS - Instructions

Unplug microwave
Remove bottom of Microwave with phillips screwdriver.
Remove connecting wires to Motor
Remove Motor (2 Screws) with Torx Wrench.
Transfer seal from old motor to new moter
Re-install motor
Connect wires
Reinstall Bottom of microwave
Plug back into outlet

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Removed panel and installed upper and lower switches. I did this because it did not do it all the time. When I removed the switches I used a ohms meter to check continuity but they all checked out at first then I started playing around with the buttons on each switch by pushing in on them and letting off and found one when you pushed in and out three or four times that one switch would jump back and forth by ohms meter that was the bad switch. If any one else has that problem the switch might show continuity when you first test but click the switch button a few times to see if you get a different reading. Microwave up running. Thanks Partselect.

Removal of Phillip Head screws from Top vent and Control panel. Removed Torx head screw to remove entire switch assembly. Removed three wires to switch leads. Unclipped old switch. Replaced wires and inserted New switch in to clips. Attached assembly with Torx screw. Set Control panel back into place and screwed in top screw. Replaced upper vent with 2 screws.

remove 6 lower screws, removed lower panel,2 screws holding drive motor,lower motor, remove old coupling from inside microwave and replace with new coupling, re install motor,install lower panel and screws.no more sparks

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.

Turn off power supply at breaker . Replace old bulb with new bulb .

Part of the support was missing. I had to remove the two switches and put them in the new bracket
Had the switches reversed and started blowing fuses. Reversed them and changed the fuse and it started working.

We needed a phillips head screw driver to remove the single screw holding the light bulb cover in place.
Removing the old bulbs was a little work, because they had come loose from the sockets. We unplugged the microwave, so we could grip the sockets with a tool. I think my husband used a needle nose plier for this.
The new bulbs screwed in easily, and then we refastened the light bulb cover with the phillips head screw driver.

Remove the two screws to the plastic vent strip at the top of the unit. That exposes a metal cover (upper right) held in place by two more screws. (Found that removing the screw holding the key panel in place and moving that out of the way made for more work room) Remove the metal cover. The HV diode (visible) on one end is secured to the chassis by a screw. The other end is fitted to the HV capacitor. So unscrew one end and pull the HV diode off the capacitor. The replacement fits on like the old one came off. Very simple repair. But it would be safe to short the capacitor terminals to the chassis first. Noticed that it appeared the sparking was caused by the HV diode's outer casing being worn by the asbestos covered wire next to it and laying against it. I made sure the two were not touching, before putting the covers back on. Also, the problem started with an occasional spark when the MW started. It quickly deteriorated to a full, non-stop electrical sparking. You can hear it, smell it, and see it through the top vent. You don't need to remove unit to work on it.

screwed in new bulb

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.

Just opened the door and dropped in new part and viola!

Repair unsuccessful because they sent the wrong part, even after I questioned their selection. It is amazing how a company as large as Whirlpool cannot clearly indicate to the people who work for them how to order the correct part. The fault lies not in the individual who is putting the order in but with the company who cannot take the time to make sure that person is successful in completing their job. Will never buy a product from this company again.
As far as the shipping is concerned. It took forever, just to find out that the part was incorrect.
Better luck next time. right?

Used a screwdriver only. The grill vent is not at all durable and stared to crack. The microwave is less than 2 years old.