Smoker display shows E4 and unit will not start or shuts down mid‑cook.

Safety: Unplug the smoker before removing any control panel screws or covers.

Basic checks:

• Verify the outlet is providing stable power by testing another appliance or using a plug‑in tester. Avoid using long or undersized extension cords.
• Remove the control panel bezel to access the electronic control board. Inspect for burnt spots, bulging capacitors, or a burnt smell.
• Check all wire harness plugs going into the control board. Reseat each connector firmly.
• Look for signs of moisture intrusion behind the control panel. If present, dry the area thoroughly and consider adding a drip shield or gasket.

If E4 persists:

• The control board is likely defective. Order the correct Smokin Tex control board by model and serial number.
• Label and photograph all connections before removal. Transfer wires one by one from the old board to the new board.
• Secure the new board and reassemble the control panel before testing.

Note: If you see extensive charring or melted wiring, stop and have a professional evaluate for safety.