A microwave turntable that won't turn is most often off its coupler, riding on a dirty or misplaced roller ring, or switched off by a turntable button on models that have one. If those check out, the turntable motor has likely failed, and that repair is for a technician because microwave internals can hold dangerous high voltage even when unplugged.
Safety first: Unplug the microwave before cleaning inside it, and never remove the outer cabinet or any internal cover.
Follow the diagnostic path
Step 1: Is the glass tray sitting correctly on the center coupler?
If yes: Go to Step 2.
If no: Lift the tray and set it back so the notches underneath line up with the coupler's arms.
Step 2: Is the roller ring clean and in place?
If yes: Go to Step 3.
If no: Wash the ring and wipe the floor of the cavity. Crumbs and spills can jam the wheels.
Step 3: Does your microwave have a turntable on/off button?
If yes: Make sure it's on. Some models let you turn the turntable off for large dishes, and it's easy to leave it that way.
If no: Go to Step 4.
Step 4: Is the plastic coupler in the center cracked, worn or loose?
If yes: On many models it lifts straight out and a matching replacement drops in. Use the part for your model number.
If no: Go to Step 5.
Step 5: Does the tray turn easily by hand but not while the microwave runs?
If yes: The turntable motor or its wiring has likely failed. A technician should handle it; the motor sits under the floor of the cabinet near high-voltage parts.
If no: Something is binding. A dish that's too wide can catch the walls; try a smaller one.
What your answer points to
| What you found | Most likely cause | DIY or technician |
|---|---|---|
| Tray off the coupler | Misplaced tray | DIY |
| Gunk on the roller ring | Debris jamming the wheels | DIY cleaning |
| Turntable button off | Setting | DIY |
| Cracked coupler | Worn part | DIY replacement |
| Tray turns by hand, not in use | Failed turntable motor | Technician |
Stop and call a technician if
- •The microwave sparks, smokes or makes a loud buzz.
- •The turntable motor needs replacing.
- •The door doesn't close or latch properly.
Keep it from coming back
- •Wipe spills from the cavity floor promptly.
- •Wash the tray and ring regularly.
- •Use dishes that clear the walls when they spin.
Owen's shop tip: Before you blame the motor, flip the glass tray and look at the notches underneath. A chipped tray can slip on the coupler and look exactly like a dead motor. If the door itself is sticking when you go to lift the tray out, our guide to a microwave door that won't open covers the latch.
Turntable still stuck? Call ProFix Boston at (617) 812-1425, or see our microwave repair service.