Washer-dryer overfills or shows E04 shortly after starting; may attempt to drain immediately.

Safety first: Disconnect power and close water taps. Mop up any spilled water.

• Check for overfilling: If the drum is visibly overfull, manually drain via the pump filter before proceeding.
• Inspect pressure hose: Remove the top cover. Locate the small rubber hose running from the bottom of the tub to the pressure switch. Check for kinks, splits, or blockages (detergent sludge).
• Clean pressure chamber: Detach the hose at the tub end and blow through it to clear residue. If blocked, clean the tub connection with a small brush and hot water.
• Test the pressure switch: With the hose attached, gently blow into it and listen for clicks inside the switch. Use a multimeter to verify contact change when pressure is applied. Replace if unresponsive.
• Check inlet valve: If water continues to enter even when the machine is off, the inlet valve is stuck open and must be replaced immediately.

Warning: Overflow conditions can damage flooring and nearby cabinets. If the error recurs after these checks, a PCB fault may be present and requires professional service.