What does LG Washer Overflowing - Causes & Fix mean?

A stuck-open water inlet valve is the most common cause. Stop the fill, unplug the machine, and replace the valve if water leaks in.

How do I fix LG Washer Overflowing - Causes & Fix?

Work through the step-by-step fix below. Start with the quick reset and the most common cause, then check the specific part this guide points to. Most fixes need only basic hand tools and the right replacement part.

Can I keep using my LG appliance with this error showing?

Usually not. LG appliances show this error when a part or safety circuit is out of range, so running it can stop the cycle or make the problem worse. Diagnose and clear the error before normal use.

What part is most commonly replaced for LG Washer Overflowing - Causes & Fix?

The parts that most often fix LG Washer Overflowing - Causes & Fix are listed in the parts section of this guide. Match the part to your exact model and serial number before you buy.

Is LG Washer Overflowing - Causes & Fix a DIY repair or do I need a technician?

Many fixes are DIY-friendly with basic tools, such as door switches, drain pumps, water inlet valves, thermostats, heating elements, and filters. Sealed-system, refrigerant, gas, or high-voltage work should go to a licensed technician for safety.

LG Washer Overflowing - Causes & Fix

LG Washer Overflowing — What’s Happening

An LG washer overflow fault means the control has detected water above the safe limit in the tub, or the machine is continuing to fill when it should not. LG describes this condition as water overflowing beyond the safe limit, and it requires the washer to be stopped, drained, and serviced if the problem returns.

The overflow is usually the result of a mechanical or electrical failure in the water-fill system. Either water is physically leaking into the tub uncontrolled, or the control board is getting incorrect level information and never shuts off the inlet valve.

Jump to Fix

Most Likely Causes

Stuck-open or failed water inlet valve The valve solenoid fails closed or debris wedges the valve seat open, allowing water to flow continuously even when the machine is off or not calling for fill.
Faulty water level sensor or pressure switch The sensor misreads the tub level and never signals the control to stop filling, so the valve stays energized beyond the proper fill point.
Blocked, pinched, or disconnected pressure sensor hose A clogged or damaged air-pressure hose prevents accurate tub-level sensing, leaving the control unable to detect when the tub is full.
Excessive water supply pressure Supply pressure above 116 psi can force water past the inlet valve seat faster than the control can react, or it can damage valve components over time.
Main control board sending incorrect fill command The board output relay or triac fails closed and continues to power the inlet valve coil even when the machine should have stopped the fill cycle.

How to Diagnose and Fix

Turn off both hot and cold water supply taps immediately, then unplug the washer to stop all electrical control.
Run a drain or spin cycle (or manually advance the dial to drain-only) to remove excess water from the tub before opening the cabinet.
Verify whether water is still entering the tub with the machine unplugged and the supply taps open. If water flows in, the inlet valve is leaking mechanically and must be replaced.
Pull the washer forward and remove the rear or top panel to access the inlet valve at the top rear and the pressure sensor assembly on the side or bottom of the outer tub.
Inspect the small clear or rubber air-pressure hose running from the outer tub to the pressure sensor for kinks, blockage, or disconnection. Blow through it gently or flush with water to clear any debris.
Check inlet water supply pressure at the wall taps using a pressure gauge. LG specifies 14.5 to 80 psi as the normal range. If pressure exceeds 116 psi, install a pressure reducing valve on the supply line.
If the valve does not leak mechanically and the pressure hose is clear, test the pressure sensor or water level switch per the service sheet. Replace the sensor if it does not close or open its contacts at the correct air-pressure points.
If both the valve and sensor test good, inspect the main control board for visible relay damage or burn marks on the valve-output circuit, and verify wiring harness connections are tight and not corroded.

Parts You Might Need

Part	Notes
Water inlet valve assembly	Amazon \| Most common replacement when the tub keeps filling or overfills.
Pressure sensor or water level switch	Amazon \| Replace when the sensor misreads tub level or does not respond to air pressure.
Main control board	Amazon \| Required if the board is sending continuous fill voltage after valve and sensor are confirmed good.

If your appliance also shows a code on the display, these match this problem:

When to Call a Pro

Call a professional if you are uncomfortable working with water supply plumbing under pressure, if diagnostic multimeter testing of electrical components is unfamiliar, or if the overflow returns after you have replaced the inlet valve and verified the pressure hose is clear. A qualified appliance technician has the service manual, pressure-test equipment, and model-specific resistance and voltage specifications needed to isolate control-board and wiring faults safely.