Air fryer heats but never reaches set temperature; cooking is consistently underdone.

Safety first: Unplug and cool the unit before internal inspection.

• Verify with thermometer: Use an oven thermometer placed in the basket to compare actual temperature to the set temperature. Large discrepancies indicate a regulation issue.
• Clean sensor area: Gently clean the interior ceiling and sensor probe area to remove grease that can insulate the sensor.
• Check sensor mounting: Ensure the NTC probe is firmly mounted and not hanging loose away from the hot air stream.
• Replace sensor: If temperatures remain inaccurate, replace the NTC temperature sensor probe with a compatible Sage part.
• Board fault: Persistent large errors after sensor replacement may indicate a control PCB calibration issue, requiring board replacement.