How To Repair A Washer That Fills and Drains At The Same Time

How To Fix A Washer That Drains While It's Filling

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  • Rated as REALLY EASY
  • 609 repair stories
  • 2 step by step videos

Water Inlet Valve

Water comes into your washing machine for the wash and rinse cycles through the water inlet valve. So if the tub is filling past the time it ought to be, it could be a result of a broken water inlet valve. Unplug the washer when the tub’s finished filling. If water keeps coming in, then the water inlet valve is broken. If the water stops coming in when the machine’s unplugged, then there is an electrical problem somewhere else in the machine. In this case, check the water level switch, the timer, the electronic control board, or the pressure switch.

Water Level Switch or Pressure Switch & Air Dome Tube

Sometimes a defect in the devices used to measure the water level can cause your tub to keep filling during the time it ought to be just draining. Here’s how the water level is measured: there’s an air dome tube or hose hooked up to the tub. The pressure in your filling tub compresses the air in this tube. When the tub is full enough, the air in the tube pushes against a diaphragm at the water level switch. And the water level switch then turns off the inlet, stopping the flow of water. A leak or blockage in the tube ruins this process because the air pressure never gets strong enough to push the diaphragm. A flaw in the switch could also mean that the water inlet isn’t turned off when it ought to be. Start your diagnosis by unplugging the washer and finding the air dome tube, which is located behind the control panel and that runs between the tub and the water level switch. Take the hose off and put it under water, pinching one end closed and blowing into the other to check for air bubbles. Is the tube blocked with something? Look through the tube with a flashlight or feel along its length. And check for cracking or worn spots. If the air dome hose was fine, or once you’ve cleared or replaced it, check the water level switch too. Are there indications that the mechanics of the switch are faulty or that it is clogged? To test the continuity of the water switch circuits, let your washing machine fill up to the proper level and then unplug it. Find the pressure switch and the terminals on it that control the water inlet valve, by checking your model’s wiring schematic. Pull those wires and test them with your multi-meter while the tub is still full. If the resistance is infinite, your water level switch is fine. Otherwise, it needs to be replaced. If yours is an electronically controlled washer, the water level switch could be under the tub in the neighborhood of the sump.

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