T-fal Insufficient Heating / Temperature Calibration Drift

Food is undercooked or takes much longer than expected, even at correct settings.

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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

Weak heating element, NTC sensor reading too high (underheating), Fan not circulating air effectively, Door or basket not sealing properly

How to Fix / Troubleshooting

Safety first: Unplug before internal inspection.

Basic checks:

  • Verify you are not overloading the basket; cook in smaller batches.
  • Preheat the air fryer for several minutes before adding food.
  • Shake or turn food halfway through cooking for even browning.

Performance test:

  • Use an oven thermometer placed in the basket to compare actual temperature to the set temperature.
  • If the actual temperature is significantly lower, suspect the heating element or NTC sensor.

Internal checks (advanced):

  • Inspect the heater for partial burns or discoloration.
  • Test the NTC sensor resistance and compare to expected values from service data if available.
  • Replace a weak heater or misreading NTC sensor with compatible T-fal parts.
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Repair Difficulty

Medium 3/5

Required Part

NTC Temperature Sensor
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