E3 error appears during preheat or pressure build; unit stops heating.

Safety first: Unplug the cooker and allow it to cool fully. Do not add water to a hot dry pot suddenly as it may warp or splatter.

• Check inner pot: Confirm the stainless-steel inner pot is correctly seated on the heating plate. Never operate the cooker without the inner pot.
• Verify liquid level: For pressure or slow cook programs, ensure you have at least the minimum liquid recommended in the All-Clad manual (typically 1–2 cups). Add more liquid if needed.
• Clean heater plate: Remove the inner pot and inspect the heating plate for burnt food or discoloration. Wipe gently with a damp cloth once cool. Do not pour water directly into the cooker base.
• Check bottom of inner pot: Make sure the bottom is clean, flat, and free of burnt-on residue that could cause hot spots.
• Ventilation and placement: Ensure the cooker is not pushed against a wall or under low cabinets where heat can accumulate. Provide adequate airflow around the unit.
• Retry: Reassemble, add proper liquid, and restart the program. If E3 appears again quickly, discontinue use.

Persistent E3 may indicate a failing overtemperature sensor or thermal fuse, which should be diagnosed and replaced by a technician.