Front Load Washer Overflows
Is there enough water pressure from the house water supply to the washer?
The washer needs at least 20 PSI to shut off automatically when filled. If the water pressure is too low, the washer will continue to accept water, causing an overflow.
Water Inlet Valve
Important: Unplug the washer from its power source before starting any inspection or repair work.
If you shut the power to the washer off, but it still fills with water, the water inlet valve is defective and must be replaced.
Pressure Switch and Air Tube
The pressure switch is another part that helps the washer know there is enough water in the tub. If it's defective, water will continue filling. There is an air tube that connects to the switch. As water fills the tub, the air pressure in the tube increases as well. When the correct pressure is achieved, water should shut off.
Check the air tube for damage, and then check the pressure switch.