How to Repair a Washing Machine Drain that Overflows

What You'll Need
New washing machine fill valve
Replacement water level control pressure hose
Replacementpressure switch

If you have a washing machine drain that is giving you problem, you will need to repair it as soon as possible in order to avoid a flooded laundry room. Repairing a washing machine that overflows is not as difficult as you think, and this simple step step how-to guide will show you everything you need to know.

Step 1 - Find the Problem

Before you can repair the problem with your washing machine, you will need to know what the source of the overflow is. To begin diagnosing the problem, turn on the power to your washing machine and let it begin to fill with water. When the water reached the half-full level, turn the machine off. If the water continues to flow into the machine, then your washing machine has a mechanical problem. In most cases, this will mean a stuck or faulty fill valve. But, if the water ceases to flow when you switch off the machine, the fill valve is probably okay.

The next step is to check the wiring and switches in your washing machine. To do this, unscrew the panel on the rear of the washing machine. Locate a switch that has a plastic or rubber tube attached to it, and then take it off an blow it out. Inspect the tube carefully and make sure it is not clogged with lint or other foreign matter. Replace the hose, and try to fill the machine again. Sometimes, this may fix the problem. However, if it does not correct the problem, try blowing out the tube while it is still attached to the pressure switch. If the pressure switch is functioning properly, you will hear 2 mechanical clicks. If you don't hear the clicking sounds, you will need to purchase a replacement pressure switch for your machine.

Step 2 - Purchase Needed Parts

After you have determined which part is faulty and is causing the overflow problem with your machine, visit a retailer that sells your type of washing machine and order replacements. Be sure to write down the model number of your washing machine and take it with you when you visit the store.

Step 3 - Unplug Washing Machine

Before you begin making repairs to your machine, disconnect the power plug from the electrical outlet in the wall. Also, shut off the water valve that supplies water to the washing machine.

Step 4 - Correcting the Problem

  • Replace the Fill Valve: In order to replace the fill valve, you will need to disconnect the hoses that are connected to the fill valve. Then, use a screwdriver to remove the screws. Remove the faulty fill valve and then install the replacement valve. When installing the replacement valve, ensure that the blade connectors are properly aligned.

  • Replace the Water Level Control Hose: To replace the water level control hose, remove the old one with a pair of pliers and pull the ends of the hose off the switch. Then, install the new hose in the reverse order.

  • Replace the Pressure Switch: in order to replace the switch, use a screwdriver to remove the 2 screws that are used to secure the pressure switch. Next, remove the terminal connectors that are used for the electrical wiring connections to the switch. Sometimes, the switch may use a wiring harness. Finally, secure the new switch in place with the screws and reconnect the wiring harness or connectors.