How to fix a washing machine that overflows during filling?

 

Turn Off the Water and Electrical Supply

 

Before identifying the issue, always make sure your safety is first. Turn off the washing machine’s electrical power by unplugging it from the wall socket, and shut off the water supply to prevent additional overflow or flooding. This initial precaution fixes the immediate risks while troubleshooting what causes the appliance to overflow.

 

Check the Water Level Pressure Switch (Water Level Sensor)

 

A washing machine has a water level pressure switch (also called a water level sensor) controlling how much water fills into the drum. When this pressure switch malfunctions or clogs, it is unable to detect when enough water has entered the machine, causing excessive filling and overflow.

• Remove the washing machine control panel to locate the water level pressure switch (consult your washing machine manual to navigate your particular model correctly).
• Check the hose connected to the water level switch for clogs, leaks, cracks, or any disconnection from the switch itself.
• If clogged, clean it gently with appropriate tools or replace a damaged hose entirely.
• If you suspect faulty functionality, test the switch with a multimeter. Switches that don't show proper continuity during tests should be replaced immediately.

 

Evaluate The Water Inlet Valve

 

Water inlet valves control the water’s entry into your washing machine. Due to sediment buildup, debris blockage, or worn parts like the valve solenoid, these valves can malfunction, causing water to continue flowing into the drum uncontrollably. A faulty inlet valve is often responsible for overflowing issues in washing machines.

• Shut off water supply connections and disconnect the hoses from the inlet valve on your washer.
• Inspect inlet valve screens for dirt, sediment, corrosion, or buildup restricting the valve from closing completely.
• Clean screens carefully with a soft-bristle brush. If entirely damaged, replacing the screens is necessary.
• If cleaning does not solve the issue or the valve shows signs of physical damage, replace the inlet valve unit to restore proper functionality.

 

Inspect Drain Hose and Drain Pipe Installation

 

Sometimes, appearing overflows are due to improper installation or positioning of the drain hose. Either incorrect positioning or clogging can result in water backflow and subsequent washer overflow issues.

• Ensure the drain hose sits no deeper than approximately 4-6 inches into the drain pipe. Insert it tightly to prevent accidental slipping out but not excessively deep.
• Check if the drain pipe has obstruction or blockage, preventing water from flowing effectively.
• Remove clogs thoroughly and reposition your drain hose correctly to ensure free flow from the washer.

 

Inspect Internal Washer Components and Control Board

 

Aside from mechanical faults, washer overflow issues sometimes come from faulty electronic control boards and internal electrical components controlling the filling cycles.

• Inspect the wires and connections on internal parts linked to water filling cycles.
• If you can't find a visible mechanical malfunction, electronic control board issues or faulty timer switches may require professional testing with advanced tools.

If you are unsure about handling internal electronics or testing complicated parts like control boards, seek professional help. Expert appliance repair technicians can conduct thorough and accurate diagnostics to identify electronic failures.

 

Verify Correct Use of Detergent

 

Overflowing can sometimes occur due to excessive suds created by using inappropriate amounts or the wrong type of detergent. Special high-efficiency (HE) detergents are designed explicitly for modern washing machine models.

• Check your washing machine manual to confirm you are using the correct detergent recommended by the manufacturer.
• Avoid using excessive amounts of detergent during washes, ensuring you follow the measurement instructions accurately.

Using the correct detergent prevents unnecessary over-sudsing and reduces overflow issues significantly.

 

Contact a Professional Washing Machine Repair Expert

 

When the above troubleshooting methods don't solve your overflow issue, seeking professional appliance repair assistance is the best solution. Particularly for residents in St Louis and Nashville, professional appliance repair services like Hoffman Brothers specialize in quickly diagnosing complicated problems associated with overflowing washing machines.

A skilled technician brings specialized tools and deep industry knowledge, ensuring your appliance troubles are efficiently resolved, restoring your washing machine to its optimal functionality without additional hassles or risks.