What does LG Microwave Turntable Not Turning - Causes & Fix mean?

Usually a mis-seated glass tray or damaged coupler. Remove the tray, check the coupler and roller guide for cracks, reinstall correctly.

How do I fix LG Microwave Turntable Not Turning - Causes & Fix?

Follow the step-by-step diagnosis below. The most likely fix is identified by checking power, sensor resistance, and control-board signals in order — using a multimeter and the part numbers documented in the parts reference table.

Can I keep running the equipment with this fault active?

Generally no. Faults on Appliance units are emitted when a sensor, safety, or control circuit is outside its operating envelope. Running through an active fault risks compressor, heater, or control-board damage. Diagnose and clear the fault first.

What part is most commonly replaced for LG Microwave Turntable Not Turning - Causes & Fix?

The most frequently replaced parts for LG Microwave Turntable Not Turning - Causes & Fix are listed in the Parts Reference section of this guide with OEM part numbers and typical price ranges. Check the table for direct replacements.

Is LG Microwave Turntable Not Turning - Causes & Fix a DIY repair or do I need a technician?

Sensor swaps, fan motor replacements, and condenser cleaning are typical DIY-level repairs. Anything involving refrigerant, gas, or high-voltage (>240V) work requires a licensed technician for both safety and code-compliance reasons.

LG Microwave Turntable Not Turning - Causes & Fix

LG Microwave Turntable Not Turning — What’s Happening

When the turntable in your LG microwave stops rotating, the drive path between the motor and the glass tray has been interrupted. The tray may not be seated correctly on the coupler (the rotating shaft), the roller guide underneath may be damaged or obstructed, or the turntable motor itself may have failed.

LG points to a small set of mechanical issues first. The glass plate must lock onto the coupler and sit flat on the roller guide. If either part is damaged, worn, or blocked by debris, the tray won’t turn. In a smaller number of cases, the motor has stopped working or the control board is not sending power to the motor.

Jump to Fix

Most Likely Causes

Mis-seated or upside-down glass tray The tray is not fully engaged on the coupler shaft or is installed incorrectly.
Debris or obstruction under the tray Food, grease, or foreign objects in the roller track or around the coupler block movement.
Damaged or stripped coupler The plastic coupler that connects the motor shaft to the tray is cracked, rounded, or stripped.
Worn or cracked roller guide The roller ring has broken wheels, cracks, or does not roll freely on the cavity floor.
Failed turntable motor The motor that drives the turntable is not running or is mechanically jammed.
Turntable function turned off Some LG models have a setting to disable rotation, and it may be active.
Control board not powering the motor The user control or display board is not sending power to the turntable motor.

How to Diagnose and Fix

Unplug the microwave before any inspection or handling of internal parts.
Remove the glass tray, coupler, and roller guide, then clean all surfaces and the cavity floor to remove any debris.
Inspect the coupler for cracks, rounding, or stripping, and replace it if damaged.
Check the roller guide for broken wheels, cracks, or binding, and confirm it rolls smoothly on a flat surface.
Reinstall the roller guide, coupler, and glass tray in the correct orientation, making sure the tray locks fully onto the coupler.
Check the microwave settings to confirm the turntable function is not disabled (if your model has that option).
If all mechanical parts are intact and installed correctly, access the bottom of the unit and locate the turntable motor.
Test the motor by running the microwave and listening for motor operation, or replace the motor if it does not run or shows visible damage, then check wiring and the control board if the motor is not receiving power.

Parts You Might Need

Part	Notes
Turntable motor	Amazon \| Drives the coupler and glass tray.
Coupler (shaft turn table)	Amazon \| Plastic part that connects motor to tray.
Roller guide (turntable assembly)	Amazon \| Supports and rolls the glass tray.
User control and display board	Amazon \| If motor is not getting power.

If your appliance also shows a code on the display, these match this problem:

When to Call a Pro

If you have cleaned, reinstalled all parts correctly, and replaced the coupler and roller guide but the tray still does not turn, the turntable motor or control board is likely at fault. Motor replacement requires accessing the bottom of the microwave and working around high-voltage components. If you are not comfortable with that work or if the motor tests good but still does not receive power, contact an LG-authorized service technician for diagnosis and board-level repair.