Display shows U12 and cooker cannot start pressure cooking

Safety first: Ensure the cooker is cool and not under pressure.

• Re‑lock lid: Open and close the lid, rotating firmly into the locked position. Confirm the steam release valve is set to Sealing.
• Check lid components: Verify the inner lid, sealing ring, and float valve are installed correctly and not obstructing closure.
• Inspect lid sensor: If U12 persists, inspect the lid position switch or magnet and adjust or replace the Cosori lid position sensor as needed.