Whirlpool Top Load Washer: Troubleshooting Slow Draining... | appliancefaults.com

Technical Background:

The washer's Main Control Unit (MCU) controls the drain pump operation. The MCU sends a 120V AC signal to the drain pump motor when the drain cycle is initiated. This voltage energizes the pump motor, causing it to expel the water from the tub. The MCU monitors the drain pump current draw, and if the current is outside the expected range (due to a blockage or pump failure), it may trigger an error code (though none is reported in this case) or extend the drain time as it attempts to clear the obstruction. Faulty wiring between the MCU and the drain pump can also interrupt the signal.

Symptoms:

The Whirlpool top load washer is taking an excessively long time to drain, approximately 45 minutes, and water remains in the tub after the drain cycle completes.

Possible Causes:

Clogged drain hose or standpipe.
Obstructed drain pump filter or pump impeller.
Kinked or collapsed drain hose.
Faulty drain pump motor.
Restricted air vent in the drain system.
Defective lid switch (some models halt draining if the lid is open).

Solution:

1

Unplug the washer from the outlet. Lock-Out/Tag-Out (LOTO) the breaker.
2

Inspect the drain hose for kinks, clogs, or collapses. Disconnect the hose from the standpipe and check for obstructions. Clear any blockage.
3

Access the drain pump (usually located at the bottom rear of the washer). Remove the pump filter and clean out any lint, debris, or foreign objects.
4

Manually rotate the drain pump impeller to check for free movement. If it's stiff or jammed, the pump may need replacement.
5

Reconnect the drain hose and plug in the washer.
6

Run a short drain cycle. Observe the drain time and water flow. If the problem persists, use a multimeter to check for 120V AC at the drain pump connector during the drain cycle. If voltage is present but the pump isn't running, replace the drain pump.
7

If no voltage is present at the pump, inspect the wiring harness and connections between the MCU and the pump for damage or loose connections. Replace any damaged wiring.

Safety Warning:

Always disconnect power to the appliance before performing any repairs. Lock-Out/Tag-Out (LOTO) the breaker. High voltage components are present inside the appliance. Exercise caution and follow proper safety procedures to avoid electrical shock.

Prevention:

Regularly clean the drain pump filter (every 3 months) to prevent lint and debris buildup. Avoid overloading the washer to prevent excessive lint production. Use high-efficiency (HE) detergent as recommended by the manufacturer.

Expert Tip:

To enter service mode on some Whirlpool top load washers, press and hold the start button, then press and release the power button, then release the start button. This may allow you to run diagnostic tests, including a drain pump test, to further isolate the issue.

Frequently Asked Questions

•How do I access the drain pump on my specific model?

Consult the service manual for your specific Whirlpool top load washer model. Usually, it involves removing the front or rear panel of the washer, which is secured by screws or clips. Some models may require tilting the washer back to access the pump from underneath.

•What if I find voltage at the drain pump connector, but the pump still isn't working?

If you're getting 120V AC at the drain pump connector during the drain cycle, but the pump isn't running, it's almost certainly a sign that the drain pump motor itself has failed and needs to be replaced. The motor windings may be open or shorted, preventing it from operating.

•What is the correct drain hose height and diameter for my washer?

The drain hose should typically be installed with the top of the standpipe between 30 and 96 inches above the floor. The drain hose inner diameter is typically 1-1/4 inches. Check your owner's manual for the specific recommendations for your Whirlpool top load washer model. Incorrect height and diameter can cause siphoning issues.

Whirlpool Top Load Washer: Troubleshooting Slow Draining Issues

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the drain pump on my specific model?

•What if I find voltage at the drain pump connector, but the pump still isn't working?

•What is the correct drain hose height and diameter for my washer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: