Air fryer does not reach set temperature; cooking takes much longer than recipes indicate.

Safety first: Unplug and cool the unit before internal inspection. Use an oven thermometer to verify temperature if possible.

Step-by-step checks:

• Verify load and preheat: Avoid overloading the basket and allow a few minutes of preheat. Overfilled baskets can mimic underheating.
• Clean heater and sensor: Remove the basket and clean the heating element and visible sensor with a soft brush and mild degreaser. Built-up grease insulates heat and affects sensor readings.
• Temperature test: Place an oven thermometer in the basket and run the unit at 400°F (or highest setting) for 10–15 minutes. Compare the reading to the set temperature.
• Inspect element: If only part of the element glows or heats, it may be partially open. Replace the heating element assembly.
• Sensor and board: If the element appears fine but temperatures are consistently low, the sensor or control board calibration may be off. Replacement of the NTC sensor or main board may be required.

When to stop: If you cannot achieve near-set temperatures after cleaning and basic checks, consult a technician for component-level diagnosis.