Food cooks unevenly; top is burnt while bottom is undercooked, or one side is much darker.

Safety first: Unplug before internal inspection.

• Loading practices: Do not overfill the basket; keep food in a single layer where possible. Shake or turn food halfway through cooking.
• Check basket fit: Ensure the basket sits flat in the drawer and the drawer closes fully. Replace a warped basket.
• Clean vents and fan guard: Remove grease and debris from the fan guard and exhaust vents to restore proper airflow.
• Fan speed check: Listen for a strong, consistent fan noise. If it sounds weak or intermittent, the fan motor may be failing and should be replaced.

Consistent uneven cooking despite proper loading often indicates a fan or airflow issue that requires component replacement.