If your washer fills and drains at the same time check the drain hose to make sure it is properly installed and meets all installation requirements.
If the drain hose is not properly installed, or the drain pipe is too small, then the hose could be siphoning water from inside the washer’s tub while filling.
Make sure the drain hose is at least 30 inches high and has an internal diameter of 1.5 inches in order to provide an air gap around the drain hose to prevent suction. If the drain pipe is too low or the wrong size, then the installation of a siphon break kit at the end of the drain hose might be necessary.
If the drain hose is not high enough, then use a clip to attach the hose to the back of the washer to lift the drain hose up.
If the drain hose is pushed too far into the stand pipe inside the wall, then a vacuum could be created, causing water to be sucked out of the machine via the drain hose. Readjust the drain hose and make sure there is a bend at the apex of the drain hose.
The pressure switch monitors the water level in the washer. There is a hose attached to the pressure switch and sometime the problem lies with the hose and not the switch. If the hose has a leak in it, it will cause the tub to overfill.
First, check the hose attached to the switch for any cracks or leaks. If none exist, then the problem probably lies with the switch.
Tagged: drain hose, emptying, holds the drain hose in place, installation requirements, siphon break kit, siphoning condition, Washer Drain Hose Retainer, Washer Fills and Drains at the Same Time, water inlet valve, water level or pressure switch