Kenmore Microwave 721.80039700 (72180039700, 721 80039700) Parts
Genuine Lg part
By: Lg
Part Number: 3B73362F
Microwave won't start or runs with door open? Failed door switch prevents safe operation. Simple DIY fix with basic tools in under 30 minutes.
This part fixes the following symptoms
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No heat
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Won't start
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shuts off after a few seconds
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Do-It-Yourself Stories from Customers like You
Interior light and turntable failed at the same moment. Stacey B. • New Bern , NC • February 01, 2021
Knowing the odds of 2 failures occurring at the same exact time was unusually high, I just searched your site for what other broken items might affect these two failures. Came up with next control item upstream and tallied that item failure with percentages of successful repairs, (4 mins.) door safety switch.
Since I had to change out the most likely of the 3 and since I was already was going to be into the switch panel I ordered all 3 and swapped them all out to cover my butt, as they were...
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$19.45
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$23.34
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$3.89
Genuine Lg part
By: Lg
Part Number: 3B74133Q
Microwave won't turn on or trips breaker? The time delay fuse protects against power surges. Located by the magnetron. Moderate DIY repair.
Do-It-Yourself Stories from Customers like You
Lg microwave oven did a loud pop and quit working Stephen C. • Cape Coral , FL • March 18, 2015
Called AppliancePartsPros because of good experiencing diagnosing problem with a dishwasher repair. We definitely are modest income amateurs! Same excellent response to our questions. Three possible causes. Used easy search menu to fine replacement parts. Bought all three, knowing that if all not needed, the others could be returned (within 365 days) for refund. Replaced the capacitor successfully after calling to get more help with a couple of places where we got stuck. Oven now works...
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$10.42
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$12.40
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$1.98
Genuine Lg part
By: Lg
Part Number: 4810W1A151A
Holds the damper assembly in place inside the microwave cavity above the wave stirrer. Replace if bracket is bent, broken, or missing during installation.
Do-It-Yourself Stories from Customers like You
Incorrect parts given to me upon purchase of appliance Marnie S. • Kennewick , WA • March 08, 2018
Needed installation parts. I ordered the parts from the company I purchased the appliances from. A week went by and no parts, called, emailed and called again to find out when the parts would arrive to be able to Re-schedule the installation. After the run around, I found AppliancePartsPros website and placed my order with them. I received the parts I needed within the time they promised. I was able to schedule my installation to enjoy my new appliance. It's been almost 4 weeks and still no...
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$15.95
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$18.98
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$3.03
Genuine Lg part
By: Lg
Part Number: 4900W1A001B
Exhaust damper for microwave venting systems. Installs on rear exhaust to regulate airflow. Replace if cracked, broken, missing, or not sealing properly.
Do-It-Yourself Stories from Customers like You
Incorrect parts given to me upon purchase of appliance Marnie S. • Kennewick , WA • March 08, 2018
Needed installation parts. I ordered the parts from the company I purchased the appliances from. A week went by and no parts, called, emailed and called again to find out when the parts would arrive to be able to Re-schedule the installation. After the run around, I found AppliancePartsPros website and placed my order with them. I received the parts I needed within the time they promised. I was able to schedule my installation to enjoy my new appliance. It's been almost 4 weeks and still no...
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$13.74
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$16.49
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$2.75
Genuine Lg part
By: Lg
Part Number: 6912W1Z004B
Replace your microwave's interior or underside light bulb when dim or burned out. Restores visibility for monitoring food. Confirm fit with your model.
Do-It-Yourself Stories from Customers like You
Interior light and turntable failed at the same moment. Stacey B. • New Bern , NC • February 01, 2021
Knowing the odds of 2 failures occurring at the same exact time was unusually high, I just searched your site for what other broken items might affect these two failures. Came up with next control item upstream and tallied that item failure with percentages of successful repairs, (4 mins.) door safety switch.
Since I had to change out the most likely of the 3 and since I was already was going to be into the switch panel I ordered all 3 and swapped them all out to cover my butt, as they were...
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$12.54
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$14.92
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$2.38
Genuine Lg part
By: Lg
Part Number: 4970WRA001G
Microwave door won't stay closed or latch? This door latch spring provides tension to secure the door shut. DIY repair in under 10 minutes with video help.
Do-It-Yourself Stories from Customers like You
Lg microwave door would not latch closed Audrey S. • Rochester , NY • February 05, 2018
Ordered door latch part and new spring.
You Tube video helped me identify what I needed. I tried the fix recommended and it didn't work so I ordered the parts. It took less than 5 minutes to switch out the old for the new. If the door doesn't latch, you can't run the microwave and it's key. It wasn't an expensive or hard fix to get my microwave up and running again. So pleased with AppliancePartsPros for having what I needed and being reasonable about pricing. Turnaround time was excellent!
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$9.02
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$9.92
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$0.90
Genuine Lg part
By: Lg
Part Number: 1B71961H
Replaces a cracked, chipped, or broken glass turntable tray inside your microwave cavity. Typically damaged during cleaning or accidental impacts.
Do-It-Yourself Stories from Customers like You
Burnt out Kenmore microwave light. Timothy E. • Wilmington , DE • May 11, 2018
Pretty easy fix. Took out 7-8 screws to remove cover for access to light. 2 were security type screws so I had to run to the hardware store to buy a special screwdriver. One screw to remove the bulb.
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$38.95
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$46.74
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$7.79
Genuine Lg part
By: Lg
Part Number: 2B71165R
Fix a microwave that won't heat with a new magnetron. This part generates the microwave energy needed for cooking. Moderate DIY repair, 1-2 hours.
Do-It-Yourself Stories from Customers like You
Above range microwave not heating at all Alan K. • Sunrise , FL • October 05, 2015
LG Help-line said probably a failed magnetron, but since out of warranty,referred me to an authorized LG repair service. They wanted $79.95 service call to come out & diagnose problem. I ordered replacement magnetron for less than cost of a service call, Plus the part was delivered next day! Works like new again. Happy wife = happy life!
Notes for DYI-ers:
1.Be careful removing over the stove microwaves--get help,they are heavier than you think.
2.Unplug microwave for 48 hrs, carefully...
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$128.75
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$151.92
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$23.17
Genuine Lg part
By: Lg
Part Number: 6021W3B001V
Microwave won't heat or makes loud buzzing noise? The diode regulates magnetron current flow. Simple repair—test with multimeter for continuity.
Do-It-Yourself Stories from Customers like You
Our microwave made a "pop" sound and stopped working/ Daniel D. • Chesterfield , MO • September 12, 2020
I have a multimeter so I was able to check the fuse per website recommendations and it was blown. However, the capacitor on the microwave was also original so I elected to replace the capacitor, fuse, and the ground protect diode. The repair was very simple (making sure the capacitor was discharged before replacing) and the microwave is now up and running again. Excellent trade to buy $40 worth of parts rather than a new $400 microwave. One nit - Kenmore puts a screw in the back that...
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$15.95
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$18.82
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$2.87
Genuine Lg part
By: Lg
Part Number: 3213W1A049F
Inner door frame assembly for microwaves. Supports window, trim, handle, and latch alignment. Replace if cracked, broken, or structural clips damaged.
Do-It-Yourself Stories from Customers like You
Glass fell out of its retainers and plastic clips holding the frame assembly to the door broke off Steve C. • Caledonia , WI • September 23, 2015
Careful placement of new screws into the inside of the outer door that now hold the frame assembly to the door secured the frame assembly to the outer door. All of the other parts I bought and replaced were a waste of money. I figured since I had them I might as well install them anyways. Easier than sending them back since I had the whole thing apart anyways. The part I really needed was no longer available, the outside door. The glass reinstalled into the retainers in the door without a...
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$73.95
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$87.26
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$13.31
Genuine Lg part
By: Lg
Part Number: 5889W2A012F
Plastic support ring that holds the turntable glass tray in your microwave. Replace if cracked, broken, or worn. Brown color, 10-inch diameter.
Do-It-Yourself Stories from Customers like You
I needed a new rotating ring for my microwave Richard V. • Fishers , IN • January 03, 2026
No fix, just replace
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$24.95
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$29.69
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$4.74
Genuine Lg part
By: Lg
Part Number: 3300W0A030A
Metal mounting plate that secures the microwave chassis to the wall or cabinet. Replace if bracket is bent, cracked, or missing during installation.
Do-It-Yourself Stories from Customers like You
Missing mounting bracket and hardware. Stephen H. • Fort Myers , FL • January 01, 2021
Ordered it from you.
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$141.56
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$151.87
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$10.31
Genuine Lg part
By: Lg
Part Number: 4051W3A001A
Fastens panels, brackets, and covers inside the microwave cabinet. Replace if cracked, broken, or missing to restore secure mounting and alignment.
Do-It-Yourself Stories from Customers like You
The cover was cracked. John N. • Brookfield , WI • October 06, 2020
Bought the cover and the rivet put it on very easy repair
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$6.95
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$8.34
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$1.39
Genuine Lg part
By: Lg
Part Number: 6620G00007B
Holds the light bulb and maintains electrical connection in your microwave. Replace when socket is cracked, heat-damaged, or causes flickering lights.
Do-It-Yourself Stories from Customers like You
The light under our lg over the range microwave was not bright enough William W. • Alvarado , TX • April 26, 2016
Added an additional light socket to the existing reflector. Changed the original 40 watt incandescent bulb to two 5 watt LED bulbs. It's actually bright enough for my old eyes now.
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$19.45
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$22.95
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$3.50
Genuine Lg part
By: Lg
Part Number: 5893W3A002D
Fix overheating or noisy microwave with this cooling fan assembly. Restores airflow through internal components. Simple 60-second replacement.
Do-It-Yourself Stories from Customers like You
Melted fan cover in microwave Matthew B. • Kirkland , WA • September 13, 2016
Simply removed the melted cover and fan assembly, replaced with new parts. Took about 60 seconds!
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$19.45
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$23.15
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$3.70
Genuine Lg part
By: Lg
Part Number: 3861W1A043C
Mounting hardware kit for installing microwave to wall or cabinet. Includes screws, bolts, and brackets needed to secure unit. Replaces missing parts.
Do-It-Yourself Stories from Customers like You
Missing mounting bracket and hardware. Stephen H. • Fort Myers , FL • January 01, 2021
Ordered it from you.
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$41.23
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$49.06
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$7.83