Oven shows d1 and may not allow certain functions or may be in a special mode.

Safety first: Follow the user manual instructions; no internal access is usually needed.

• Exit diagnostic mode: Press and hold the designated keys (often "Cancel" plus another key) for several seconds to exit diagnostics.
• Power cycle: Turn off power for several minutes, then restore and verify normal operation.
• Configuration check: Enter the configuration menu (per service manual) and confirm the correct model settings are selected.