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KMML550RPS00 Whirlpool Microwave - Overview

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Cook Tray – Part Number: W11367904
$60.51
In Stock
Cook Tray
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(34)
Part #W11367904
The glass turntable tray rotates food in the microwave to ensure even heating. Designed for compatibility with specific models, it provides a stable surface for cookware. Check fitment before ordering, as trays may vary slightly in size and configuration.
Mounting Plate – Part Number: W11025649
$23.60
In Stock
Mounting Plate
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(7)
Part #W11025649
This mounting plate is sourced directly from the original manufacturer for use with microwaves. It is a metal plate designed to support a microwave by attaching the microwave to the wall studs. If the mounting plate wears down or becomes damaged, it will cause the microwave to tilt and become unstable, potentially damaging the appliance and the wall it is attached to. Therefore, it is important to replace the plate promptly. First disconnect the microwave from the power source and locate the fasteners that hold the mounting plate. Detach the old plate and align the new one with the existing mounting holes. Secure the plate and check that the microwave is stable and unmoving.
DIODE – Part Number: W11256462
$26.82
In Stock
DIODE
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Part #W11256462
This diode, or high voltage diode, is used in microwaves. It is an electrical current control device that ensures power flows in one direction and not the other way. If your microwave produces no heat, heats inconsistently, or gets noisy, replacing this part can be the solution. The tools needed for this replacement are a nutdriver, pliers, and screwdrivers. First remove the microwave cover, then remove the old part by disconnecting the small thermostat. Replace with the new diode. Remember to use the diagram provided by the manufacturer for more instructions.
R Ceramic Fuse 20 A – Part Number: W11707984
$36.85
In Stock
R Ceramic Fuse 20 A
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Part #W11707984
If your microwave is not turning on it could be due to your fuse needing to be replaced. This part protects the microwave by shutting it off if there is an electrical surge. This fuse is just over an inch long, is metallic on both ends and ceramic in the middle. Before beginning this repair, unplug the appliance and wait a few minutes before starting. Remove the outer cabinet which is held in place with two screws. You will then locate the power cord which will lead you to the fuse holder. Determine if the fuse has blown. Using an ohmmeter, you should be able to figure out if it has blown. A proper reading is zero ohms, if it reads as anything else then your fuse has in fact blown. Simply snap the old fuse out of place and place the new one in.
Microwave Damper – Part Number: W10843943
$60.51
In Stock
Microwave Damper
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Part #W10843943
This damper is an authentic OEM replacement assembly used in microwave/range hood combos. It includes the damper door and frame. It is designed to direct the flow of air through the vent duct, and the release of steam and heat from the appliance during cooking. Over time, the damper door and frame can wear down or become obstructed by food particles and debris. A faulty damper assembly will result in poor ventilation, uneven cooking, and excessive moisture buildup which can damage internal components in the appliance. Disconnect any wires or connectors attached to the faulty damper assembly and remove it from the appliance. Position the new damper assembly and reconnect the wires/connectors before securing it with the appropriate fasteners.
Microwave Turntable Motor – Part Number: WPW10466420
$44.23
In Stock
Microwave Turntable Motor
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Part #WPW10466420
As per manufacturer this no longer comes with the Spacer.
Hardware Kit – Part Number: W10821385
$76.17
In Stock
Hardware Kit
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(1)
Part #W10821385
This is a manufacturer-approved mounting kit for your microwave. This kit is crucial for keeping your microwave securely wall-mounted. This kit does not include the mounting plate itself. This kit comes in handy if you buy your microwave separately from the mounting kit.
Microwave Spacer – Part Number: 8184109
$9.62
In Stock
Turn Ring – Part Number: W11443144
$23.60
In Stock
Microwave Capacitor – Part Number: W10850446
$137.03
In Stock
Microwave Capacitor
Part #W10850446
This authentic high-voltage capacitor stores and supplies electrical energy to the magnetron so that your microwave can heat up your food. It is a cylindrical component located inside the control area of the microwave. If the capacitor malfunctions, you may hear buzzing or humming noises, witness sparks or arcing inside the microwave, or experience inconsistent or no heating of your food. As microwaves use high voltage, exercise extreme caution during the repair process to avoid injury. Even when unplugged, the capacitor retains a significant electrical charge. To replace it, start by unplugging the microwave and removing the glass turntable and support before proceeding. Refer to the user guide for instructions on accessing the capacitor within the cabinet. Discharge the capacitor by creating a short circuit between each terminal and between each terminal and the chassis. Do so by using a pair of insulated-handle needle-nose pliers to simultaneously touch both terminals. Alternatively, you can use a well-insulated screwdriver, touching one terminal and gently sliding it forward to the other terminal, holding it there for a few seconds. Avoid touching the metal part of the tool and be aware that this can result in a loud and startling popping sound. Once discharged, you can safely disconnect the wires and remove the mounting fasteners. Please note that this OEM replacement part is sold individually.
SUPPORT – Part Number: W11452278
$12.85
In Stock
SUPPORT
Part #W11452278
THERMISTOR – Part Number: W10536989
$27.36
On Order
THERMISTOR
Part #W10536989

Common Symptoms of the KMML550RPS00

How this model fails, and the parts that fix it.

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Microwave made very loud noise while on. No heat.
52 of 87 people found this instruction helpful.
  • Sleiman from Miami, FL
  • Easy
  • More than 2 hours
  • Pliers, Screw drivers
Unless you have a very comfortable background with electronics and electricity, I don't necessarily recommend taking apart a microwave. If you are very handy and are going to be VERY cautious to follow the rules of discharging caps and testing voltages before moving forward, then go for it. That said, I took the microwave off and apart. Not knowing where to find the parts, I was fortunate that the installer put the instruction book for the microwave inside the front vent slot above the touchpad for reference. it details the location of every part and it tells you very clearly what each part you test should show specific to this microwave on your multimeter. Find this guide online if you don't have it. Turn on the microwave for 20 seconds with a glass of water to make sure it's not heating - that with the noise means it's eeither the magnetron, cap, or diode. Read the notes on this site for all of the basic things to look for with the magnetron, diode, and capacitor. Once comfortable with the guide, locations of those devices, and how to test, then take it down and apart. Unfortunately, I didn't do all those things in that order, and it only wasted a lot of time trying to find the parts. Once I found the parts and put all the screws and covers back for all the areas that didn't need to be accessed for the repair, testing went quickly. The diode was bad. Ordered a new one and had it in 3 days or so. That means your microwave will be apart and sitting somewhere for a little while until you get the part and have time to repair it. Putting the diode back isn't too bad. Reassemble the microwave and put it back up again. If i had to do it again, it would take me 20 to 30 minutes once the microwave was down and on a table. Also, I used some bricks with towels over them or you could use some sawhorses to keep the microwave elevated so you can plug it in and run it after installing the new component. Again, make sure you discharge the cap before touching anything again even if you didn't run it, but just plugged it in.
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Humming sound, not heating.
43 of 63 people found this instruction helpful.
  • Fausto from Miramar, FL
  • Easy
  • 15 - 30 mins
  • Nutdriver, Pliers, Screw drivers
I turn off the income electricity by shutting down the corresponding circuit breaker. Then, I removed the control panel from the microwave which gave me access to the capacitor and adjacent diode. After that i unscrewed the defective diode and replaced it with the new one and BINGO!
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Microwave wouldn't turn on and found breaker been tripped and then microwave wouldn't turn on at all.
31 of 55 people found this instruction helpful.
  • Daniel from DECATUR, GA
  • Easy
  • 30 - 60 mins
  • Pliers, Screw drivers
Read some instructions and easily found the fuse. Replaced it. Still didn't work. Took control panel off to check door switches. Nothing I read mentioned a second fuse. Tested and it to had blown. Ordered another one. Popped them in. Done.
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