Whirlpool Top Load Washer: Loud Buzzing Noise & No Water... | appliancefaults.com

Technical Background:

MCU logic and voltage paths.

The washer's Main Control Unit (MCU) controls the water inlet valve based on signals from the water level sensor and the lid switch. When the start button is pressed and the lid is closed, the MCU sends 120V AC to the water inlet valve solenoid, opening the valve to allow water to flow into the tub. A buzzing noise often indicates the solenoid is receiving power but is unable to fully open the valve.

Symptoms:

US homeowner observations.

The Whirlpool top load washer makes a loud buzzing noise when the cycle starts, but the tub does not fill with water. The washer may otherwise appear to power on normally and the control panel responds to button presses.

Possible Causes:

Faulty water inlet valve.
Clogged water inlet screens.
Defective lid switch.
Malfunctioning electronic control board (MCU).
Low water pressure to the house.
Kinked or blocked inlet hoses.

Solution:

1

Turn off the breaker to the washer.
2

Disconnect the water inlet hoses from the back of the washer.
3

Inspect the inlet screens for debris. Clean or replace as needed.
4

Reconnect the hoses and turn the water supply back on.
5

Using a multimeter, check for 120V AC at the water inlet valve terminals during the fill cycle.
6

If voltage is present, replace the water inlet valve.
7

If no voltage is present, investigate the lid switch and electronic control board.

Safety Warning:

LOTO and high voltage warning.

Always disconnect power to the appliance before performing any repairs. Use proper lockout/tagout procedures to prevent accidental energizing of the circuit. High voltage is present in the control panel and wiring. Seek licensed technician assistance if you are not comfortable working with electricity.

Prevention:

Specific maintenance.

Periodically inspect and clean the water inlet screens. Ensure adequate water pressure to the house. Avoid overloading the washer to prevent strain on the components.

Expert Tip:

Trade secret or service mode sequence.

On many Whirlpool top load washers, you can access the diagnostic mode by pressing the following button sequence within 6 seconds: Start/Pause, Cancel, Start/Pause, Cancel, Start/Pause. This will often display error codes that can help pinpoint the problem. Be sure to refer to the service manual for the specific model for accurate diagnostics.

Frequently Asked Questions

•How do I test the water inlet valve?

With the power disconnected, use an ohmmeter to check the valve solenoid for continuity. A reading outside the specified range (typically 500-1500 ohms) indicates a faulty valve.

•Where is the lid switch located and how can I test it?

The lid switch is usually located near the lid hinge. You can test it with a multimeter for continuity when the lid is closed. Refer to the wiring diagram for the correct terminals.

•How do I access and check the electronic control board?

The electronic control board is typically located behind the control panel. Carefully remove the panel to access it. Visually inspect the board for any signs of damage, such as burned components or swollen capacitors. Use a wiring diagram and multimeter to test input and output voltages as needed, but this is best left to trained technicians.

Whirlpool Top Load Washer: Loud Buzzing Noise & No Water - Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I test the water inlet valve?

•Where is the lid switch located and how can I test it?

•How do I access and check the electronic control board?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: