Air fryer heats but never reaches set temperature; cooking is consistently underdone and preheat takes very long.

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

• Step 1 – Verify with thermometer: Use an oven-safe thermometer placed in the center of the cavity. Run the air fryer at 400°F and compare the actual temperature after 10–15 minutes to the setpoint.
• Step 2 – Clean sensor area: Locate the oven cavity temperature sensor (usually a small metal probe or covered bump inside the cavity). Clean off any baked-on grease that could insulate it.
• Step 3 – Inspect mounting: Ensure the sensor is firmly attached to the cavity wall and not hanging loose. Re-secure with the original bracket or screws.
• Step 4 – Replace sensor if needed: If the unit is consistently 50°F or more below setpoint and other functions are normal, replace the NTC temperature sensor. If the problem persists, the main control board may require replacement.