Air fryer heats but temperature is too low; food takes much longer than expected to cook.

Safety: Unplug and cool before internal checks.

• Verify with thermometer: Use an oven thermometer placed in the basket. Run the fryer at 200°C and compare actual temperature to the set value.
• Clean heater and fan: Heavy grease on the heater and fan can reduce effective heat transfer. Clean the heater guard and interior surfaces thoroughly.
• Check sensor mounting: Access the NTC sensor and ensure it is firmly clipped to the heater shroud or air channel. Loose sensors can cause the control to think it is hotter than it is.
• Inspect wiring: Look for partially broken sensor wires that may cause erratic readings. Replace the NTC temperature sensor if readings are unstable.
• Element condition: If the heater shows dark, pitted areas and cooks poorly even when glowing, consider replacing the heating element.
• PCB calibration: If all hardware is good but temperature remains consistently low, the control PCB may be miscalibrated and require replacement.