Char-Broil Runaway Heating / Temperature Control Failure

Smoker overheats well above set temperature and burns food

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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 relay on control board stuck closed, Temperature sensor reading too low, High‑limit thermostat bypassed or failed closed

How to Fix / Troubleshooting

Safety first: Unplug the smoker immediately if it is overheating. Keep the door closed until temperatures drop to avoid flare‑ups.

  • Inspect control board: After cooling and unplugging, remove the control housing and inspect the relay that controls the heating element. If it is visibly burned or melted, the board should be replaced.
  • Check sensor placement: Ensure the cabinet temperature sensor is properly mounted and not hanging near the door or in a cold spot. A sensor reading too low will cause overheating.
  • Test high‑limit thermostat: Verify that the high‑limit thermostat opens at its rated temperature (requires heating and a multimeter). If it remains closed when hot, replace it.
  • Replace faulty components: Install a new main control board or high‑limit thermostat as indicated by testing. Never bypass safety thermostats.
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Repair Difficulty

Hard 4/5

Required Part

Main Control Board
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