Display shows H1 or 'HI' and the temperature reading is stuck at maximum; smoker may shut down or refuse to start a new cycle.
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: If the smoker is extremely hot or you suspect a grease fire, keep the door closed, unplug the unit, and allow it to cool fully. Do not open the door until flames are out.
After cooling:
- Inspect the temperature probe location: Ensure the RTD probe is mounted in its original position on the side or back wall and not bent toward the heating element.
- Clean the probe: Remove heavy grease and carbon buildup from the probe with a non-abrasive pad and mild cleaner.
- Check wiring: Access the rear of the smoker and inspect the RTD wiring for damage or shorts to the cabinet. Repair any damaged insulation.
- Reset and test: Unplug the smoker for 5–10 minutes to reset the control. Plug back in and monitor the temperature reading at room temperature. If it still reads extremely high, the sensor or board is faulty.
Repair: Replace the RTD temperature sensor probe first. If the H1/HI condition persists with a new sensor, replace the main control board.
Repair Difficulty
Required Part
We may earn a commission from links on this page.