E3 appears on the display and the cooker shuts down or refuses to start, often after a long cooking cycle or when the unit is very hot.

Safety first: Unplug the cooker and let it cool for at least 30–45 minutes before further steps.

• Improve ventilation: Ensure the multicooker is used on a hard, heat-resistant surface with at least several inches of clearance on all sides and above. Do not operate under low cabinets where heat can accumulate.
• Clean the inner pot and plate: Remove any burnt-on food from the inner pot and wipe the heating plate clean. Heavy buildup can cause localized overheating.
• Check for external heat sources: Make sure the cooker is not placed next to a stove burner, oven vent, or other appliance that could raise its external temperature.
• Inspect thermal fuse (advanced): With the unit unplugged and bottom cover removed, locate the small cylindrical thermal fuse attached to the heating plate bracket or wiring harness. Check for discoloration or signs of overheating. A blown thermal fuse will usually read open circuit with a multimeter and must be replaced with the same rating.
• Reset and test: After cooling and cleaning, plug the unit back in and run a short program with water only. If E3 recurs quickly, the thermal protection components or control board may be faulty.

Warning: Never bypass a thermal fuse or overheat protection device. Doing so can create a fire hazard. If you suspect a failed thermal fuse or control board, contact a qualified technician.