KBMS1454SBT2 KitchenAid Microwave - Instructions

My microwave began suddenly making a loud harsh humming noise while cooking food. I did not let it go on long enough to know if it cooked the food or not. I did some Internet research and learned that it was likely the Magnetron. The test for this was to run the microwave for at least a minute on the lowest power setting and see if the noise cycled on and off. It did, so I (actually, my wife) ordered the part from partselect.com using the model number. I was successful in replacing the part, and we are back to microwave popcorn and quick defrost for a price that was less than a service call, however, it was time consuming, required a large work area, and access to 5 out of 6 sides of the unit. So proceed at your own discretion

Caution:

The first thing in every set of repair instructions was to discharge (short-circuit) the capacitor, as it may store large (as in lethal) amounts of electricity even when it is not connected to a power source. I had never done this, but found these instructions:

“Discharging your microwave's capacitor is absolutely essential in preventing injury to your microwave, your tools, and yourself. A capacitor stores a large amount of electricity even when your microwave is unplugged, and it must be discharged before beginning any repair.
A capacitor is discharged by creating a short circuit between each of the two capacitor terminals, and between each terminal and the chassis. The chassis is the metal mounting (bare metal surface) of the capacitor. Read these directions thoroughly before you proceed.
With your microwave unit unplugged, touch the blade of a well insulated screwdriver to one terminal. Gently slide the screwdriver forward until it reaches the other terminal, holding it there for a few seconds. Be aware that this often results in a loud and startling 'POP'.
Repeat this procedure in order to create a short circuit between each capacitor terminal and the chassis (bare metal mounting plate surface). This same method can be applied to a capacitor having three, and not two, terminals.”
I had not run my microwave in over a week, and then while my part was shipping, left my microwave 'unplugged' for more than two days, and my capacitor apparently discharged itself, although I did go through the above procedure carefully and completely - just in case.
Step-By-Step:
1. You must remove your microwave from the cabinets - it is impossible to repair otherwise. This is best accomplished with 2 strong people - my wife and I made it work, but wished for another guy.
a. While supporting the microwave, remove the two screws coming down through the cabinet above.
b. Lift the rear of the microwave as much as possible, then tilt the front down - there is a clip high on the left side, as well as the hinge/clips on the bottom.
c. If you do not lift it off the wall all at once, you may have to lift the rear even farther to remove it from the hinge/clips on the bottom.
Important Note: Always beware of the microwave door, if it is bent or broken and cannot retain a seal, the microwave not function as a safety feature to keep from releasing microwaves.
2. Remove the vent cover on the top/front of the microwave - be careful, it's plastic.
3. Remove the vent cover and light panel on the bottom of the microwave - this is several screws and some simple wire clips.
4. Remove the "shell" (top and sides) of the microwave - this is several more screws on the back. Make sure to remove the plate that is holding the cord in place on the top.
5. Remove the interface panel by the screws on the top (which had been hidden by the vent cover) - the wires can remain attached, just slide it aside.
6. Remove the metal cover on the right side at the rear; this will expose the Magnetron and the Capacitor. Remember to immediately test and discharge the capacitor!

7. After you discharge the capacitor, remove the other cover plate and the support bracket - in case you haven't noticed, this is a time and space consuming operation.

8. You

After popping the last few kernals of popcorn, we hear a different kind of pop sound come from our microwave oven. When we looking inside, we found that the glass turntable had broken unevenly in half. Although we didn't understand why it had happned, we did know we'd be without the use of the microwave without a new one. After less than 10 minutes surfing online, I had found the correct part on PartSelect.com and had arranged to have it shipped to me by speedy delivery. Once it arrived, I just popped the new turntable into the microwave and used the box to dispose of the broken one. It could not have been easier and it saved me the cost of a service call and likely further delay.

1)Power off 2) Remove frame covering front timer display - screw on the bottom 3) unscrew time display - 4 screws 4) unsnap lamp spring clip 5)replace lamp

I took out the old chipped dish and replaced with the new dish...

The instructions from another customer was helpful. I concur with another comment I read while researching this proceedure. What Idio-- would design a microwave that required pulling the unit from the wall and removing the top panel just to access. It is good idea to unplug the transformer and capacitor wires before proceeding. I also googled a schematic to see the parts layout. Remember not to touch the bulb with your fingers. Use a cloth or paper towel.

I used a Google search to show how to access the area behind the front panel. There was a folded paper copy with a schematic and wiring diagram in that space.Then I used a multi-meter to determine which of the THREE micro-switches was causing the problem. I called your help line and ordered a replacement switch. The switch was delayed in transit so your agent credited me with the cost of shipping.

When the part arrived, it had three terminals instead of two as shown in the on-line picture but that did not cause any difficulty in using it. It took about 20 minutes to remove and replace the old switch.

All seems to be working well now.

Finding which of the THREE switches was the problem was the most difficult part of the repair. All three "clicked" but the defective one did not click as easily. It needed to be depressed more than the door latch can would provide. Old age?

I just placed the tray in and was done. The kicker is that i cannot use my microwave without the tray. so i was without my microwave for 2 weeks before i called parts select. they were quick and fast.

1) Identified the breaker that the microwave was connected to and turned it off.
2) Removed the four screws holding the extension kit to the microwave (easily visible on the front of the microwave) and removed the side panels (required sliding the panels up and off).
3) Removed the six screws holding the microwave to the cabinet (exposed after removing the extension kit)
4) Slide the microwave out and unplugged the cord from the outlet
5) Removed the screws that secured the front display panel to the microwave. These are located on the side of the microwave just behind the display panel. There are a total of 4 screws, 2 on each side. Additionally there was a clip holding the front panel on. We were able to press down to get it to release. NOTE: You will not be able to fully remove the panel as there are cables that run back to the board which is only reachable by removing the top panel
6) Removed the screws along the sides. back, and top to remove the top panel (there are 3 screws on each side and 2-3 in the back, there is only one screw on the top near the back right that holds the top to a part inside the microwave.
7) Peeled the top off of the microwave - there is a line of double sided tape that held the front of the top panel to the back of piece where the front display panel was mounted.
8) Carefully remove the existing LED Display Board. There is a single plastic clip that you have to very gently press back to slide the LED out. We were not careful enough and the clip broke. It did not hinder the replacement and even without the small plastic bit the LED board sat snuggly in its spot.
9) Trace the cable from the LED board back to the circuit board and unplug the cable. We pulled the cable out through the front of the microwave as the hole from the front display panel back to the board was just slightly too small to fit the board through.
10) The new LED panel arrived with extra boards attached to it. There were clear spots where the boards were perforated to easily snap off.
11) Thread the new cable from the front of the microwave through the hole and plug in where you removed the previous cable
12) Seat the LED Display Board in the slot.
13) Replace the top of the microwave and the associated screws (we used four small bowls to separate the screws for the top of the microwave, screws for the front of the microwave, screws for mounting the microwave, and screws for the expansion kit)
14) Reseat the front panel and replace screws
15) Plug microwave back in. (We took this opportunity to turn the breaker back on to test and make sure everything was working before we remounted the microwave)
16) Place microwave back in its mount and secure with mounting screws
17) Replace the extension kit if applicable and its associated screws.

This is the third time that the bulb went out.It took two Sears service technitions to remove the entire appliance out of the cabinet. The entire top has to be removed and the insolation has to be pulled back to get to the electrical wire. I am waiting for an appointment to get Sears to do it again. The door springs have broken and you have to make sure the door is closed before walking away. It has a heavy glass and the weight is pretty heavy. Robert.

The replacement turntable we received was an exact duplicate of the original. It was as easy as rinsing the new turntable, taking the old turntable out and putting the new one in.

Ordered a new one, put it in place in less than one minute.

Part arrived in timely manner and placed it in microwave oven.

Set the new one inside the microwave

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.

Just put it in