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Mzb-12A Parts

Some parts shown may not be for your model. To see parts for your model only, select it from "Matching Model Numbers" list on the left.

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Switch,Micro
Genuine Lg part
By: Lg
Part Number: 6600W1K001Q

The Switch, Micro is an OEM part for LG microwaves. This micro switch is crucial for the operation of the microwave door mechanism, ensuring that the microwave only operates when the door is securely closed.

Causes of a bad micro switch can include wear and tear from frequent use, damage due to electrical faults, or physical impact that disrupts its functionality.

Symptoms of a bad micro switch include:

  • The microwave not starting or stopping unexpectedly
  • The door not latching properly
  • The microwave light not turning on or off correctly
  • Error messages appearing on the control panel

This OEM LG part is also compatible with Sears/Kenmore models.

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... Read more

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$7.43
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Microwave Magnetron
Genuine Lg part
By: Lg
Part Number: 6324W1A001L

Microwave won't heat but runs normally? A failed magnetron is the likely cause. This part generates the microwaves that cook food. Moderate DIY repair.

This part fixes the following symptoms
  • Noisy
See more...
Do-It-Yourself Stories from Customers like You Didn't heat.   Harry W. • Maple Park , IL • January 21, 2018

My son told me that almost all the microwave ovens that came into the repair center he worked at, 15 years ago, had a defective magnetron. I ordered a magnetron, and sat back until one shipped. The one that came, the first time, was in a small factory cardboard box, which was in a large bubble-pak Fedex envelope; which didn't show any signs of abuse. Inside, however, the factory box was beat up. Removing the magnetron, I noticed that the socket, as well as its' pins, was bent, and loose in the... Read more

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$130.69
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Switch
Genuine Lg part
By: Lg
Part Number: 6600W1K001C

The Interlock Door Switch is an OEM part for LG microwaves. It is a safety component located on the door of the microwave designed to prevent the microwave from operating unless the door is securely closed. The interlock door switch works with the microwave's electronic control board to sense when the door is open or closed and allow or disallow operation accordingly.

Causes of a bad interlock door switch can include normal wear and tear from repeated opening and closing of the microwave door over time.

Symptoms of a bad interlock door switch include:

  • The microwave runs or heats with the door open
  • Error codes or diagnostic messages related to door sensors on the control board
  • The microwave fails to operate even when the door is securely closed

This OEM LG part is also compatible with some Sears/Kenmore microwaves.

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... Read more

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Microwave Diode
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... Read more

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$16.95
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Microwave Halogen Light Bulb
Genuine Lg part
By: Lg
Part Number: 6912A40002J

Halogen bulb that illuminates the cavity or cooktop below your microwave. Replace when dim, flickering, or burned out. Confirm fit with model number.

Do-It-Yourself Stories from Customers like You Needed new light   Christine M. • Blountville , TN • December 12, 2015

It wasn't easy because this microwave over-the-stove light was difficult to find at a reasonable price. However, I did find one at AppliancePartsPros.com. Since the price was so reasonable, I bought 4 bulbs plus an interior light bulb and paid the same shipping price for all. Everything works great. Read more

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$24.68
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Microwave Humidity Sensor Assembly
Genuine Lg part
By: Lg
Part Number: 6501W1A013A

Fix F4 error codes or sensor cook failures with this microwave humidity sensor. Restores automatic cooking cycles. Moderate DIY difficulty.

Do-It-Yourself Stories from Customers like You Microwave would not microwave   Richard E. • Cape Coral , FL • January 05, 2020

Replaced the Humidity sensor, Thermistor and door switches. I replaced these thinking the problem was one of the items but didn't want to trial and error one part at a time. Plus the cost was reasonable so if these didn't help I wasn't out a lot of money. I sense the door switch was the problem. Replaced all items and the microwave works great. Thanks for the advice and the cost of the parts. Read more

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Microwave Turntable Motor
Genuine Lg part
By: Lg
Part Number: 6549W1S018C

Turntable stopped rotating or making grinding noise? This synchronous motor restores smooth tray rotation for even heating. Simple DIY fix with a screwdriver.

Do-It-Yourself Stories from Customers like You Microwave turntable motor burned out   Raymond B. • Calais , ME • September 23, 2017

Removed screws from bottom of microwave, replaced motor. Read more

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$83.95
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Appliance Mounting Screw
Genuine Lg part
By: Lg
Part Number: 4000W4A003A

Replacement screw for securing panels, brackets, and internal components. Restores tight fit and proper alignment when original hardware is stripped or missing.

Do-It-Yourself Stories from Customers like You AC fan motor.   Tom C. • Liberty Lake , WA • September 26, 2021

Disassembled and replaced ac motor. The hardest part was to pull the microwave out of the cabinet. Read more

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Microwave High-Voltage Capacitor
Genuine Lg part
By: Lg
Part Number: 0CZZW1H004B

Microwave won't heat? A failing high-voltage capacitor disrupts the heating circuit. This part stores electrical energy for consistent operation.

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$29.95
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Microwave Glass Tray
Genuine Lg part
By: Lg
Part Number: 3390W1A017A

Replace your cracked, broken, or missing microwave glass turntable tray. Tempered glass design rotates to provide even heating during cooking.

Do-It-Yourself Stories from Customers like You Broken tray in microwave   Randy S. • Parkersburg , WV • May 01, 2020

Order a new glass tray to replace the broken one. It arrived faster than it said and it works great. Read more

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$83.95
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Microwave Turntable Assembly With Glass Tray
Genuine Lg part
By: Lg
Part Number: 5889W1A017B

Fix uneven heating or wobbling rotation. This microwave turntable assembly includes the glass tray and roller guide for stable, smooth spinning.

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$104.34
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Screw (Fastener)
Genuine Lg part
By: Lg
Part Number: 4B70188C

This is a replacement screw used to secure appliance components and panels. It restores proper fastening where a stripped, missing, or damaged screw causes loose parts or rattling. What it does:

  • Fastens panels, trim, or internal components to maintain structural fit
  • Helps stop vibration-related noise from loose assemblies
  • Replaces missing or corroded screws that prevent proper closures
  • Restores secure mounting after repairs or disassembly
What's included: One screw Install notes:
  • Use the correct screwdriver or bit to avoid stripping the head
  • Tighten until snug—do not over-torque to prevent thread damage
  • Keep small parts away from children and pets
  • Disconnect power or water before accessing internal parts

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$7.95
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Microwave Interior Metal Tray Shelf
Genuine Lg part
By: Lg
Part Number: 3390W2P002K

Replace your cracked or missing microwave interior metal tray shelf. Provides stable support for food and containers while containing spills.

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$93.95
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Microwave Turntable Shaft
Genuine Lg part
By: Lg
Part Number: 4371W1A001B

Fix a microwave turntable that won't spin or wobbles during heating. This replacement shaft restores smooth glass tray rotation for even cooking.

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$50.57
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Circulating Motor (Air Circulation)
Genuine Lg part
By: Lg
Part Number: 6549W1V010J

This circulating motor drives air movement inside the appliance to maintain proper airflow and temperature distribution. Replaces a worn or failed fan motor to restore normal ventilation and performance. What it does:

  • Spins the internal circulation fan to move air through the appliance
  • Helps maintain even temperature and proper airflow for cooling/heating cycles
  • Common symptom: little or no airflow, unusual grinding or humming sounds
What's included:
  • One circulating motor
Install notes:
  • Disconnect power before attempting any service to avoid shock or injury
  • Handle the motor and fan blades carefully to avoid damage to fittings and wiring
  • Verify mounting orientation and wiring color codes match the original during replacement

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$123.60
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Heater Cover
Genuine Lg part
By: Lg
Part Number: 3550W1A306B

 

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  • boxes images Over 2.1 Million Parts In Stock
  • time delivery images 2 Day Quick Delivery!
  • box-refresh images 365 Day Return Policy!
  • headphone imagesFree Tech Support!
  • google images Google Trusted Store