E4 error and display backlight flickers or goes blank

Safety first: Unplug the smoker before inspecting wiring. Do not work on live circuits if you are not trained.

• Check power source: Plug the smoker directly into a dedicated 120V outlet. Avoid long or thin extension cords that can cause voltage drop.
• Inspect power cord: Examine the Char‑Broil power cord for cuts, crushed sections, or burn marks. Replace the cord set if damaged.
• Verify internal connections: Remove the access panel to reach the terminal block where the power cord connects. Tighten any loose screws and ensure wires are fully inserted.
• Inspect control board power section: Look for burned components or cracked solder joints near the transformer or power supply components on the board.
• Replace control board if needed: If the external power is good and wiring is tight but E4 persists, the internal power supply on the control board is likely failing and the board should be replaced.