Display shows E12; smoker shuts off when attempting to preheat to higher temperatures.

Safety first: Unplug the smoker before opening any panels. Do not operate on an undersized extension cord.

• Check outlet voltage: Use a multimeter to verify the outlet voltage matches the rating plate (typically 120V AC). Low voltage can cause E12.
• Avoid extension cords: Plug the smoker directly into a dedicated outlet. Long or undersized cords cause voltage drop.
• Inspect power cord strain relief: Remove the rear panel and check where the power cord enters the smoker. Ensure the strain relief is tight and the internal connections to the terminal block are secure.
• Check for burned wiring: Look for discoloration or melted insulation on the line and neutral wires leading to the control board.
• Board power supply: If wiring and voltage are correct, the internal low-voltage power supply on the control board may be failing under load, requiring board replacement.