721 80039700 Parts

The Microwave Door Switch is an OEM replacement part for LG countertop microwaves. It monitors the door position electrically to prevent unsafe oven operation if ajar. 

Symptoms of a bad door switch include:

• Inability to start or pause a cooking cycle unless securely latched  
• Error messages about the door being open
• Inconsistent detection of open/closed door positions
• Unreliable contact functioning after extended use

Causes involve normal wear of electrical contacts and internals through many open/close uses. Exposure to moisture intrusion from spills may potentially damage sensitive switch circuitry over time as well.

This genuine LG replacement switch is also compatible with Sears/Kenmore microwaves.

The Magnetron is an OEM part for LG microwaves. It is responsible for generating the microwaves that cook or heat the food inside the appliance. The magnetron converts electrical energy into microwave radiation, ensuring efficient and even heating.

Causes of a bad magnetron can include prolonged use, electrical surges, or overheating. Over time, these factors can lead to the magnetron wearing out or failing completely.

Symptoms of a bad Magnetron include:

• The microwave not heating food
• Strange noises during operation
• Burning smell or smoke
• The microwave shutting off unexpectedly

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

The Diode is an OEM replacement part for LG countertop microwave models. Located internally on circuit boards regulating magnetron function, it precisely controls the electric current flow.

Causes of a bad diode involve thermal fatigue over time putting repetitive stress on sensitive semiconductor junctions. Microwave demands may accelerate failures.

Symptoms include:

• Intermittent cooking or complete failure to energize the tube
• Error codes appearing on the control panel display
• Buzzing or humming noises emitting from internal circuitry

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

This holder assembly secures the locker/latch mechanism in place so the door or access panel aligns and closes properly. Replacing a cracked or missing holder restores secure engagement and smooth, reliable operation. What it does:

• Supports and positions the locker/latch mechanism
• Maintains alignment for consistent latching and closing
• Common symptoms of a failed holder: loose latch feel, misalignment, door/panel not staying closed, or visible cracks/broken mounts
• Direct-fit replacement to restore proper support

• 1 holder assembly

• Disconnect power to the appliance before servicing.
• Access the locker area and retain any screws/clips; transfer any reusable hardware from the original holder as needed.
• Align the new holder with existing mounting points and tighten screws evenly—do not overtighten.
• Test latch engagement and door/panel operation before final reassembly.

This rivet assembly fastens panels, brackets, or covers inside the microwave cabinet. Replacing a damaged or missing fastener restores a tight fit, reduces vibration noise, and keeps mounted components properly aligned.

• Secures panels, brackets, or covers to the cabinet for a stable fit
• Use when a rivet is cracked, missing, or no longer holds
• Can help resolve rattling, buzzing, or loose panel movement
• Maintains proper alignment and support of mounted parts

• Disconnect power before servicing; support and remove over-the-range/built-in units for safe access.
• Microwaves contain a high-voltage capacitor that can retain a dangerous charge—service should be performed by qualified personnel.
• Reinstall using existing mounting holes; ensure the rivet is fully seated and secure.
• Wear cut-resistant gloves and eye protection to avoid injury from sharp metal edges.

This synchronous turntable motor rotates the glass tray inside your microwave to help food heat evenly. Replace it to restore smooth, consistent rotation if the tray has stopped turning, stalls intermittently, or makes unusual noises from the base.

• Drives the turntable via the center coupler to rotate the glass tray at a steady speed
• Promotes even exposure to microwave energy for more uniform heating
• Typical failure symptoms: tray won't turn, rotates only intermittently, or emits grinding/buzzing sounds from underneath
• If power reaches the motor but it doesn't run, the internal windings or gear set may be seized

• Disconnect power to the microwave before servicing
• If mounted over a range, remove the unit from the cabinet with assistance
• Access is typically from the bottom panel; note wire positions and shaft orientation before removal
• After installation, briefly test rotation before full reassembly; inspect the coupler and support for wear

This holder assembly secures and guides the door latch components so the door closes firmly and the safety interlock switches engage. Replacing a worn holder restores reliable latching and helps the unit start consistently.

• Supports and aligns the latch mechanism within the door
• Ensures door hooks engage the interlock switches for safe operation
• Helps prevent a door that won't latch or pops open
• Common symptoms: unit won't start or shows a door error unless you press on the door

• Disconnect power at the breaker before service; microwaves contain high voltage even when unplugged
• Remove the door, separate the inner/outer panels, and transfer the latch holder
• Reassemble carefully, verifying smooth latch movement and proper door alignment
• Test door closure and operation before returning to service

This door latch assembly engages the interlock switches when the microwave door closes, keeping the door securely shut. Replacing a worn latch restores safe door engagement and allows the oven to operate only when properly closed.

• Hooks into the cabinet strike to hold the door closed
• Actuates the interlock switches to permit heating
• Helps resolve: door won't latch or stay shut, "Door/Open" error messages, unit won't start unless the door is pressed
• Replaces a visibly cracked, worn, or broken latch

• Unplug the microwave before servicing; microwaves contain high-voltage components—work only on the door, not inside the cabinet
• Remove the inner door trim to access the latch; note orientation and transfer any clips/hardware as found
• Inspect the door strike and hinges for wear; misalignment can prevent proper latching
• After reassembly, verify smooth door closure and that the oven will not run with the door open

This truss head tapping screw secures panels, brackets, and covers in your appliance. Replacing a missing or damaged fastener restores a snug fit, reduces vibration, and helps keep components properly aligned for reliable performance.

• Provides low-profile holding power; wide truss head helps secure thin panels and trim
• Replaces lost, stripped, or corroded screws at the original mounting points
• Helps eliminate rattling, vibration, or loose handles/covers
• Addresses situations where a screw will not tighten or backs out during use

• Disconnect power; shut off water/gas if applicable before servicing
• Align parts and hand-start threads to avoid cross-threading
• Tighten until snug; do not overtighten to prevent stripping
• If the receiving hole is damaged, for repair before installing the new screw

A high-voltage capacitor for the appliance's high-voltage circuit that stores and releases electrical energy to support proper heating operation. Replacing a failing capacitor can restore consistent heating and prevent related electrical faults. What it does:

• Stores and delivers high-voltage energy used by the magnetron/ high-voltage assembly to generate heat.
• Failure may cause no-heat or weak-heat conditions in the oven.
• Faulty capacitors can contribute to arcing, loud humming, or blown high-voltage fuses.
• Works as part of the HV circuit; not a user-serviceable low-voltage control.

• High-voltage components can hold a dangerous charge—disconnect power and discharge the capacitor before servicing.
• Use insulated tools and avoid touching terminals; verify proper operation with appropriate test equipment.

This fuel tank assembly from MTD is a genuine replacement part. It is a fuel reservoir made from a thick and durable plastic material. It is designed to fit and work with tillers, edgers, and string trimmers from MTD, Craftsman, Cub Cadet, and Yard Machines. When this fuel tank wears out, liquid may seep out and waste gas. A fuel tank assembly replacement is easy. The process will take approximately 30 minutes or less. First, make sure that the machine has cooled down and there is little fuel left in the tank. Make sure to wear gloves since fuel spills can occur, especially when removing the fuel lines. Then, remove the spark plug connector to prevent the engine from starting. Disconnect the fuel line and unfasten the mounting screws of the fuel tank. Install the fuel tank and attach the fuel line. This replacement fuel tank assembly is sold individually. The assembly includes the tank, fuel cap, and one fuel line. It is an original replacement made directly by MTD.

A hex screw fastens and holds two components together. It has a hexagonal head and features threading starting underneath the shoulder down to the tip. Its all-metal construction offers rigidity and longer lifespan. It is also threaded, so you can conveniently loosen or tighten in position. It measures 1/4-20 x 0.5 inch and comes in brass or gold color. Take note that this replacement hex screw may beused in different locations of a machine. Double check the device’s model number for compatibility. To install this hex screw, you will need a hex wrench or a hex socket. This hex screw is a replacement made by MTD. This screw/bolt may be used on lawn mowers, snowblowers, tillers, string trimmers, leaf blowers, edgers, chainsaws, pole pruners, log splitters, or wood chippers made by Craftsman, Toro, Cub Cadet, Ryobi, Troy-Bilt, Husky, Murray, Yard Machines, MTD, Huskee, Montgomery Wards, Bolens, Yard-Man, Turf King, or MasterCut. This OEM hex screw is sold individually.

Carburetor gaskets ensure that the space between the carburetor itself and the insulator is properly sealed. This prevents air from seeping into the engine. As time passes, gaskets begin to become worn and crack, which can lead to small air leaks. If the gasket deterioration becomes severe the leaks will worsen. An air leak on an engine can cause vibrations and misfires. Gaskets should be regularly replaced to prevent engine trouble. This carburetor gasket is a genuine OEM part that has been sourced directly from the manufacturer. This carburetor gasket is manufactured from a top-quality composite material. This replacement gasket fits a number of different models of Troy-Bilt and Craftsman lawn and garden equipment. Please note these gaskets are sold individually.

The Clutch Assembly is an OEM part for MTD outdoor power equipment. This assembly is used in various lawn and garden machines to engage and disengage the power from the engine to the drive mechanism, allowing for controlled operation of the equipment.

Causes of a bad clutch assembly can include wear and tear from regular use, exposure to extreme temperatures, or damage due to improper handling or maintenance. A malfunctioning clutch can lead to poor performance and control of the equipment.

Symptoms of a bad clutch assembly include:

• Difficulty in engaging or disengaging the drive mechanism
• Slipping or jerky movements during operation
• Unusual noises when the clutch is engaged
• Loss of power transmission from the engine to the drive components

This MTD replacement part is also compatible with other brands and models within the MTD family, ensuring a wide range of applicability for your outdoor power equipment needs.

A star knob connects the upper and lower handles on an outdoor appliance, and if removed, the upper and lower handles are quick-released. This part is made of black heavy-duty black plastic, and the threads are made of steel. Over time, the threading can become worn out, making the connection loose, and causing the two handles to no longer stay in place. Star knobs are a straightforward repair that can be done in a matter of minutes. Just unscrew the original, damaged knob and screw in the new knob. The knob is designed to be unscrewed by hand, so there is no need for additional tools to make this repair. This genuine OEM replacement part is designed for a variety of outdoor appliances, including lawnmowers, edgers, chippers, tractors, trimmers, and cultivators. This star knob is compatible with Yard Machines, Yard-Man, Cub Cadet, Bolens, Craftsmen, and Ryobi products. This part ships individually.

The air filter sifts out particles and debris as air enters the engine of the mower. In small equipment engines, air filters can help provide optimal performance of the engine. The filter is made of durable foam and is rectangular in shape and is sold as a single unit. Over time, they can become clogged with debris and particles and may require replacement as a part of regular maintenance. This MTD air filter replacement will keep equipment running better and releasing fewer emissions. Before installing, soak the filter in oil and then remove the excess. The oil will help catch more debris than a dry filter would and provide more protection for the engine. This filter is made to exact OEM standards and is designed for use on select gas-powered blowers and trimmers made by MTD, Troy-Bilt, and Cub Cadet.