Timer counts down but heater and fan cycle on and off very frequently, causing uneven cooking.

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

• Verify load: Avoid overloading the basket; heavy loads can cause frequent cycling but should still cook evenly.
• Inspect sensor: Locate the cabinet temperature sensor (NTC) and ensure it is firmly attached to the metal wall with its clip or bracket.
• Check wiring: Reseat the sensor connector on the main board and inspect for damaged insulation.
• Replace sensor: If the sensor is loose, contaminated, or tests out of specification, replace it.
• Control board: If a new sensor does not correct the issue, the main control board may have a regulation fault and require replacement.