Ninja Runaway Heating / Temperature Overshoot

Smoker overheats; temperature climbs well above the setpoint and food burns.

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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 temperature sensor reading low, Sensor dislodged from mounting, Stuck heating relay on control board, High-limit thermostat not opening

How to Fix / Troubleshooting

Safety first: Unplug the smoker immediately if it overheats. Allow it to cool fully before inspection.

  • Inspect sensor placement: Ensure the temperature sensor probe is firmly mounted in its bracket and not touching the heating element or walls.
  • Clean sensor: Remove heavy grease buildup from the sensor to restore accurate readings.
  • Sensor replacement: If the smoker consistently overshoots, replace the NTC temperature sensor probe.
  • Control board check: If heating continues even when the set temperature is reached or the unit is turned off, the heating relay may be stuck closed. Replace the main control PCB and do not use the smoker until repaired.
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Repair Difficulty

Hard 4/5

Required Part

NTC Temperature Sensor Probe
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