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

Safety first: Use oven mitts when handling the hot basket.

Steps to improve cooking uniformity:

• Reduce load: Do not overfill the frying basket. Cook in smaller batches and shake halfway through.
• Clean basket holes: Ensure the perforations in the basket bottom are not clogged with grease or food.
• Check fan performance: Confirm the convection fan runs strongly and continuously during cooking.
• Inspect internal baffles: Open the housing and verify that any internal air guides or heat shields are properly mounted and not bent.
• Replace damaged parts: Replace warped heat shields or a weak convection fan motor if airflow is compromised.

Note: Shaking or turning food during cooking is recommended for many foods to ensure even browning.