Display shows E3 and the air fryer shuts off heating shortly after starting a program.

Safety first: Unplug the appliance and allow it to cool for at least 30 minutes. Surfaces near the heater can remain hot.

• Check ventilation: Ensure the air fryer is placed on a hard, flat surface with at least 10 cm clearance around all sides and above. Clear any obstructions from the rear and bottom vents.
• Clean grease and crumbs: Remove the basket and drawer. Clean the interior, especially around the heating element and fan guard, using a soft brush and a slightly damp cloth. Excess grease can cause hot spots and trigger overheat protection.
• Inspect thermal cutoff: Access the heater assembly and locate the thermal cutoff/thermal fuse mounted near the heating element. Check for signs of discoloration or deformation. A blown thermal cutoff will usually read open circuit with a multimeter and must be replaced with the same temperature rating.
• Verify sensor placement: Confirm the NTC sensor is properly fixed in its bracket and not touching the heating element directly. Misplacement can cause false high readings.
• Test run: After cleaning and inspection, reassemble and run the unit empty on a low temperature setting while monitoring. If E3 reappears quickly, suspect a faulty NTC sensor or control PCB calibration and consider replacement.

Warning: Never cover vents or operate the air fryer inside cabinets. Overheating can lead to fire.