Safety first: Unplug the multicooker immediately if you suspect overheating. Allow it to cool fully before inspection.

Inspect for scorching: Remove the inner pot and check for heavy scorching or burned-on food. Clean the pot and heater plate thoroughly with a non-abrasive cleaner and soft cloth.
Check ventilation: Ensure the cooker is used on a hard, flat surface with several inches of clearance around it. Blocked vents can cause overheating.
Power cycle: After cooling, unplug for 10–15 minutes, then plug back in and test with 2 cups of water on a short cycle. If E4 appears quickly, the sensor or control board is likely defective.
Do not continue using if smell of burning persists: If you notice a strong burning smell or visible smoke, discontinue use and have the unit inspected by a technician.
Professional repair: A shorted thermistor or stuck heater relay requires internal electrical repair. Contact a qualified service center.

Display shows E4 and the cooker beeps, refusing to start or aborting the cooking cycle.

Possible Causes