E3 appears during preheating or pressure build-up; cooker stops heating and may beep continuously.

Safety first: Unplug the unit and allow it to cool fully. Do not open the lid if under pressure; wait until all pressure is released.

• Check for scorching: After cooling and releasing pressure, remove the inner pot and inspect the bottom for burnt food. Soak and clean thoroughly. Wipe the heating plate with a soft damp cloth (do not pour water into the cooker).
• Inspect the heating plate: Look for warped or discolored areas and heavy residue. Gently remove residue with a non-abrasive pad.
• Verify steam paths: Clean the steam release valve, anti-block shield, and condensation collector. Clogged steam paths can cause localized overheating.
• Ensure proper pot contact: Confirm the inner pot sits flat and makes full contact with the heating plate. Replace a warped pot.
• Reset and test: Plug the unit back in, select a low-temperature program (e.g., Keep Warm or Slow Cook) with water only and see if E3 reappears. If it does, the temperature sensor or thermal fuse may be faulty.

Persistent E3 with a clean pot and plate usually indicates a failing NTC sensor or thermal cutoff that should be replaced by a qualified technician.