Microwave interior light is on, fan runs, but the turntable does not rotate.

Safety: Unplug the microwave before adjusting internal components.

User-level steps:

• 1. Check settings: Some Breville models allow disabling the turntable. Check the control panel or manual to ensure the turntable function is enabled.
• 2. Reseat tray and ring: Remove the glass tray and roller ring, then reinstall them carefully, ensuring the tray engages fully with the coupler.
• 3. Inspect coupler: Look for cracks or stripped splines on the plastic coupler.
• 4. Test with light load: Place a light, microwave-safe container on the tray and run a short cycle. If the tray still does not move, the motor or coupler may be faulty.

If reseating and checking settings do not restore rotation, the turntable motor or coupler likely needs replacement by a technician.