H2
Chefman
Low Temperature / Sensor Under-Range Error
H2 error appears and the unit will not heat properly.
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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
Loose NTC sensor, Sensor not in airflow path, Faulty NTC sensor reading too low, Control board miscalibration
How to Fix / Troubleshooting
Safety first: Unplug the fryer before accessing internal components.
- Reset: Unplug for 10 minutes, then test again. If H2 returns, inspect the sensor.
- Sensor position: Ensure the NTC sensor is correctly clipped near the airflow path and not dangling away from the heated area.
- Connector check: Reseat the sensor connector on the control board. Look for corrosion or loose pins.
- Replace sensor: If the sensor reads abnormally high resistance at room temperature (far above spec) or fluctuates wildly, replace the NTC sensor assembly.
- Control board: If a new sensor does not resolve H2, the control PCB may be misreading the sensor and should be replaced.
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Repair Difficulty
Hard
4/5
Required Part
NTC Temperature Sensor Probe Assembly
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