Symptoms
- Plate sits still while the microwave runs
- Food may heat unevenly as a result
- Turntable may spin freely by hand when the microwave is off
- No unusual noise, or a faint grinding/clicking sound
Likely causes
- CommonTurntable or roller guide not seated correctlyThe glass plate and its support ring need to sit properly on the drive hub to turn.
- CommonFood debris under the roller guideSpills can gum up the small wheels that let the ring turn smoothly.
- PossibleWorn or broken drive couplerThis small plastic piece connects the motor to the turntable and can wear out or crack.
- PossibleFailed turntable motorThe small motor that drives rotation can burn out over years of use.
What to do
- Turn off and unplug the microwave, then remove the glass turntable and roller guide ring underneath it.
- Clean both the turntable and roller guide thoroughly, along with the recessed area they sit in, removing any dried food.
- Check the drive coupler (a small plastic piece in the center of the floor) for cracks or wear.
- Reassemble, making sure the roller guide sits flat and the turntable engages the coupler in the center.
- Run the microwave briefly with a cup of water and watch whether it now turns.
- If it still won't turn and the coupler looks fine, the turntable motor likely needs replacement.
Tools and parts
- Soft brush
- Dish soap
Microwave drive couplerSearch: “microwave turntable drive coupler replacement”
Microwave turntable motorSearch: “microwave turntable motor replacement”
When to call a pro
If cleaning and checking the coupler doesn't fix it, an appliance technician can replace the turntable motor.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.