C2 error appears and the cooker overheats or shuts down unexpectedly.

Safety first: Unplug the cooker and allow it to cool before inspecting the lid.

• Inspect lid interior: Remove the inner lid (if removable) and check for signs of water intrusion or corrosion around the lid sensor area.
• Clean gently: Wipe the lid sensor area with a dry cloth. Do not saturate with water or cleaning sprays.
• Check wiring (advanced): If you can access the lid wiring harness, ensure connectors are fully seated and wires are not broken at the hinge.
• When to call a technician: Lid sensor calibration and replacement typically require service tools and should be done by a technician.