E2
Tristar NTC Temperature Sensor Short Circuit

Air fryer beeps and shows E2 shortly after starting a cooking cycle.

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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

Shorted NTC temperature sensor, Melted sensor insulation contacting chassis, Failed main control PCB causing false short detection

How to Fix / Troubleshooting

Safety: Unplug the air fryer and allow it to cool fully before inspection.

  • Reset the unit: Disconnect power for 10 minutes, then reconnect and test. If E2 returns immediately, proceed to inspection.
  • Access the sensor:
    • Remove rear or bottom screws to open the housing.
    • Locate the NTC sensor near the heating element or air outlet duct.
  • Inspect for shorts:
    • Look for melted insulation on the sensor leads touching the metal chassis or heater frame.
    • Check for pinched wires where the harness passes through metal openings.
    • Separate any wires that are touching metal and re-insulate with high-temperature electrical tape or heat-shrink tubing.
  • Test the sensor:
    • Disconnect the sensor from the control board.
    • Measure resistance; a near-zero reading (short) at room temperature indicates a failed sensor.
  • Replace faulty parts: Install a new NTC temperature sensor assembly if shorted. If the sensor tests normal but E2 persists, the main control PCB is likely faulty and should be replaced.
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Repair Difficulty

Hard 4/5

Required Part

NTC Temperature Sensor Assembly
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