Old Smokey Thermostat Stuck Closed / Temperature Control Failure

Old Smokey electric smoker overheats and cooks food much hotter than the dial or digital setting indicates.

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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

Failed mechanical thermostat contacts welded closed, Shorted temperature sensor, Faulty digital control board not cycling element, Bypassed or failed high-limit thermostat

How to Fix / Troubleshooting

Safety first: Unplug the smoker immediately if it is overheating. Allow it to cool completely. Overheating can be a fire hazard.

Steps to correct overheating:

  • 1. Verify with an external thermometer: Place an oven thermometer inside the smoker and run a short test at a low setting. If the internal temperature far exceeds the set point, the control system is faulty.
  • 2. For mechanical thermostat models: Locate the thermostat behind the control knob. Inspect for burnt wiring or signs of arcing. If the element stays on continuously regardless of knob position, the thermostat contacts are likely welded closed and the thermostat must be replaced.
  • 3. For digital models: Check the temperature sensor as described in the E2 procedure. A shorted sensor can cause the control to misread temperature. Replace the sensor if readings are incorrect.
  • 4. Inspect high-limit thermostat: Ensure any high-limit thermostat is properly mounted to the smoker body and has not been bypassed. Replace if it fails to open at unsafe temperatures.
  • 5. Replace faulty control components: Install a new OEM thermostat (mechanical models) or control board/sensor (digital models) if they fail testing.

Warning: Do not continue using the smoker until the overheating issue is resolved. Never bypass safety devices to keep the unit running.

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Repair Difficulty

Hard 4/5

Required Part

Mechanical Thermostat or Digital Control Board
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