Food cooks unevenly; some areas are burnt while others are undercooked.

Safety first: Unplug before internal inspection.

• Loading technique: Avoid overfilling the basket. Shake or turn food halfway through cooking for more even results.
• Clean air paths: Clean the exhaust vents and heater guard to remove grease and debris that may redirect airflow.
• Fan speed: Listen for the fan; if it sounds slow, test and replace the convection fan motor if necessary.
• Basket/tray condition: Replace a warped or damaged frying basket or crisper tray that may be blocking airflow.
• Sensor position: Ensure the NTC temperature sensor is correctly clipped in its bracket and not bent away from the airflow path.