Air fryer overheats and burns food even when set to a lower temperature; exterior may feel excessively hot.

Safety first: Unplug the unit immediately. Overheating can cause fire. Do not continue using the air fryer until the issue is resolved.

• Step 1 – Allow full cool-down: Let the unit cool completely before touching or opening.
• Step 2 – Check for visible damage: Inspect the interior for scorched areas, melted plastic, or warped components.
• Step 3 – Sensor inspection (advanced): With the unit unplugged, locate the temperature sensor near the heater. Ensure it is not detached or coated in heavy grease, which can cause incorrect readings.
• Step 4 – Control board suspicion: If the heater remains on continuously during operation (no cycling), the heater relay may be welded closed. This requires control board replacement.
• Step 5 – Do not bypass safeties: Never bypass thermostats or fuses to keep the unit running. Contact Ninja or a professional technician for repair or replacement.