Display shows E3 and smoker will not heat or cycles off immediately.

Safety first: Unplug the smoker and allow it to cool completely. Do not bypass safety devices.

• Check exhaust and airflow: Verify the top vent and any side vents are open and not blocked by foil, grease, or debris. Restricted airflow can cause overheat faults.
• Clean around element: Remove racks and drip pan. Inspect the heating element area for heavy grease or foil blocking heat flow. Clean with a non-abrasive degreaser and a nylon brush.
• Inspect high-limit thermostat: Access the back or bottom panel to locate the high-limit thermostat (small disc thermostat mounted near the element wiring). Check for signs of overheating or melted terminals.
• Test thermostat continuity: With the smoker unplugged, disconnect one wire from the high-limit thermostat and test for continuity. An open reading at room temperature indicates a failed thermostat that must be replaced.
• Replace high-limit thermostat: Remove mounting screws, transfer wires to the new OEM high-limit thermostat, and reinstall in the same location.
• If E3 persists: The control board may be misreading temperature and require replacement by a qualified technician.