H1
Nexgrill
Cook Chamber Temperature Sensor Over-Range
Display shows H1 and temperature reading is abnormally high or stuck at maximum
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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
RTD probe touching hot metal surface, Shorted RTD harness, Control board ADC failure, Grease or soot buildup on RTD causing false readings
How to Fix / Troubleshooting
Safety first: Turn OFF and unplug the grill. Allow it to cool.
- Inspect RTD placement: Inside the cook chamber, verify that the RTD probe is not bent into direct contact with the heat diffuser, fire pot, or grill grates. Gently bend it back to its original position if necessary.
- Clean the probe: Wipe the RTD with a soft cloth to remove heavy grease or soot. Do not use abrasive pads that could damage the sensor.
- Check wiring for shorts: Follow the RTD cable to the control board and inspect for melted insulation or bare wires touching the grill body. Repair or replace as needed.
- Test with a meter: Measure RTD resistance at room temperature. A very low resistance (near 0 ohms) indicates a shorted sensor that must be replaced.
- Replace RTD or control board: If a new RTD still results in H1, the main control board's temperature input circuit may be defective and should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
RTD Temperature Probe
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