Oven display shows d0 and beeps; door lock function may be disabled.

Safety first: No internal high-voltage work is typically required for this code, but always follow the user manual.

• Exit demo/diagnostic mode: Refer to the user manual for the specific key sequence to exit demo or diagnostic mode (often holding specific keys for several seconds).
• Reset control: Turn off power at the breaker for 5 minutes, then restore and check if d0 clears.
• Settings menu: Navigate to the settings/options menu and ensure the door lock feature is enabled if applicable.
• Firmware issue: If d0 persists and affects operation, the EOC may require replacement.