E8 error; machine may not fill correctly or may overfill, sometimes accompanied by unusual water levels in the tank.

Safety first: Disconnect power and close the water supply before opening panels.

• Locate level device: Depending on the Hoonved model, water level is controlled by a mechanical pressure switch, an electronic pressure sensor, or stainless-steel level probes in the tank.
• Clean pressure hose: If a pressure switch is used, remove the small rubber hose from the switch and the tank connection. Blow through it to clear grease or scale. Replace if cracked or soft.
• Check pressure switch operation: Gently blow into the switch port and listen for clicks. Use a multimeter to verify contact change. Replace if it does not switch reliably.
• Clean level probes: For probe systems, remove the probes from the tank and clean them with a non-abrasive pad to remove scale and detergent film. Ensure insulators are intact.
• Inspect wiring: Verify that connectors are tight and wires are not damaged or corroded.
• Test machine: Reassemble, restore power, and run a fill cycle while monitoring water level. If E8 persists, the control board input may be defective.