Bosch Temperature Calibration Drift

Air fryer temperature is inaccurate; food undercooked or overcooked compared to set temperature, without any error code.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Aging NTC sensor, Sensor not in correct position, Grease insulating sensor from airflow, Control board calibration offset

How to Fix / Troubleshooting

Safety first: Unplug before internal inspection.

Verification:

  • 1. Use an oven thermometer: Place a reliable thermometer in the basket, set the air fryer to a known temperature (e.g., 180°C), and compare readings after 10–15 minutes.
  • 2. Clean interior: Heavy grease on the heater guard and sensor area can affect readings. Clean thoroughly with a non‑abrasive cleaner.

Sensor and board checks (advanced):

  • 3. Check sensor placement: Ensure the NTC sensor is correctly clipped or screwed in its original location.
  • 4. Replace sensor: If readings are consistently off by a large margin, replace the NTC sensor.
  • 5. Control board: Persistent calibration errors after sensor replacement may require a new control board or firmware update via Bosch service.
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Repair Difficulty

Medium 3/5

Required Part

NTC Temperature Sensor
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