Controller displays E8 and unit powers off unexpectedly during use

Safety first: Turn the smoker off and unplug it before inspecting the power connections.

Corrective actions:

• Use a proper outlet: Plug the smoker directly into a dedicated 120V outlet with the correct amperage rating. Avoid using extension cords; if unavoidable, use a heavy-gauge (12 AWG or better) short cord.
• Check the circuit: Ensure no other heavy loads (space heaters, air conditioners) are on the same circuit. Reset the breaker if it has tripped.
• Inspect power cord: Examine the smoker's power cord for cuts, kinks, or burn marks. Make sure it is fully seated in the smoker's inlet and the wall outlet.
• Internal inspection: With the unit unplugged, remove the control box cover and check for loose neutral/hot connections, burnt terminals, or a failing internal transformer or power supply module.
• Test on another outlet: Try a different known-good outlet on a separate circuit to rule out house wiring issues.

Next steps: If E8 continues on a good circuit with proper wiring, the internal power supply on the control board may be failing and should be replaced.