Air fryer beeps and shows E2 shortly after starting a cooking cycle.

Safety first: Unplug the unit and allow it to cool fully. Do not continue using the fryer if it smells like burning plastic or insulation.

• Basic reset: After cooling, plug the fryer back in and run it empty at a low temperature (e.g., 300°F/150°C) for a few minutes. If E2 appears immediately, proceed to inspection.
• Inspect sensor and wiring: Remove the housing to access the cooking chamber area. Locate the NTC sensor (usually a small metal probe or bulb clipped near the heating element). Check for melted insulation, bare wires touching the metal frame, or signs of overheating.
• Test sensor with multimeter: At room temperature, measure resistance across the sensor leads. A reading near 0Ω indicates a shorted sensor. Replace the sensor assembly if shorted or physically damaged.
• Check for grease contamination: Heavy grease buildup around the sensor can cause localized overheating. Carefully clean the area with a soft cloth and mild degreaser (never soak electrical parts). Ensure everything is dry before reassembly.
• Control board check: If the sensor tests within spec and wiring is intact, the control PCB may be misreading the signal. Replacement of the main control board is required in that case.