Display shows E3 and the unit stops heating or shuts off mid-cycle.

Safety first: Unplug the air fryer and allow it to cool for at least 30 minutes. Do not cover vents during operation.

Basic checks:

• Ventilation: Ensure the air fryer has at least 5 inches (12 cm) of clearance on all sides. Remove any objects blocking the rear or top exhaust vents.
• Basket loading: Avoid overfilling the basket; thick, greasy loads can cause localized overheating. Try a small test batch after cooling.
• Clean the interior: Remove the basket and drawer. Clean grease and crumbs from the bottom pan, heater guard, and around the fan intake using a soft brush and damp cloth. Built-up grease can trap heat.

Internal component checks (advanced):

• Access internals: With the unit unplugged and cool, remove bottom/rear covers.
• Locate thermal cutoff and high-limit thermostat: These are usually small disc or inline components mounted on or near the heater bracket with two wires each.
• Check continuity: Using a multimeter, test each thermal device. A good thermal fuse/thermostat should show continuity (low resistance). An open reading indicates it has tripped or failed and must be replaced with the same temperature and rating.
• Inspect wiring and connectors: Look for signs of overheating (browned insulation, melted connectors) around the heater and thermal devices. Replace any damaged wiring with high-temperature appliance wire.
• Reassemble and test: After replacing any failed thermal parts, reassemble and run a short preheat while monitoring for E3.

Important: If E3 recurs after cleaning vents and replacing thermal parts, the control board may be overdriving the heater or misreading temperature; professional diagnosis is recommended.