Display or indicator lights flicker or dim when pump or heater turns on.

Safety: Unplug before inspecting internal wiring.

• Use dedicated outlet: Plug the machine directly into a properly rated outlet without extension cords or power strips.
• Check circuit load: Avoid running other high‑draw appliances on the same circuit.
• Inspect internal connections: Tighten all screw terminals on the power entry, main switch, and distribution block.
• Test power supply: Measure low‑voltage outputs from the power supply board under load. Replace the board if voltages sag below spec.