Nuwave air fryer timer counts down but food is undercooked; unit does not seem to reach set temperature.

Safety First: Unplug the unit and let it cool before internal inspection. Use caution when measuring temperatures.

Step-by-step checks:

• Verify load: Avoid overfilling the basket; overcrowding can cause uneven and slow cooking.
• Preheat: Preheat the Nuwave air fryer for 3–5 minutes at the target temperature before adding food to improve performance.
• Check fan speed: Listen for strong airflow from the exhaust. A weak or slow fan can reduce heat distribution.
• Temperature test (advanced): Use an oven thermometer placed in the basket to compare actual temperature to the set temperature. If the reading is significantly lower, suspect sensor or control issues.
• Inspect heater and sensor: With the unit unplugged, check the heating element and NTC sensor for grease buildup or damage. Clean gently if dirty.
• Replace components: Replace a faulty NTC temperature sensor or weak heating element. If both are good but temperature remains low, the main control board may be miscalibrated and require replacement.

Note: Cooking times in recipes may vary; confirm with multiple tests before concluding there is a hardware fault.