Maytag Dishwasher Loud Growling Noise During Drain... | appliancefaults.com

Technical Background:

The dishwasher's Main Control Unit (MCU) activates the drain pump motor via a relay. This sends 120V AC to the pump motor. The pump's impeller forces water through the drain hose and into the house's plumbing. A clogged pump, worn bearings or faulty motor can cause the growling noise. The MCU monitors current draw, but may not detect subtle pump issues.

Symptoms:

The Maytag dishwasher is producing a loud, growling noise specifically during the drain cycle. The dishwasher otherwise seems to be operating normally, washing and filling with water as expected, but the draining process is accompanied by a noticeable, unsettling sound.

Possible Causes:

Foreign object obstructing the drain pump impeller.
Worn or damaged drain pump motor bearings.
Defective drain pump motor.
Clogged drain hose restricting water flow.
Air lock in the drain pump assembly.

Solution:

1

Disconnect power to the dishwasher at the breaker panel. Verify 0V AC at the dishwasher outlet with a multimeter.
2

Locate the drain pump. It's typically at the bottom of the dishwasher tub. You may need a 1/4-inch nut driver to remove access panels.
3

Inspect the drain pump for any visible obstructions (food particles, glass shards, etc.). Remove any debris.
4

Disconnect the drain hose from the drain pump. Check the hose for clogs.
5

With the power OFF, manually rotate the drain pump impeller. If it's difficult to turn or feels gritty, the pump bearings may be failing.
6

If the pump still growls after cleaning, test the drain pump motor windings for continuity with a multimeter. Replace the pump if open or shorted.
7

Reassemble all components and restore power to the dishwasher. Run a drain cycle to verify the noise is gone.

Safety Warning:

Disconnect power to the dishwasher before performing any repairs. Lock Out/Tag Out (LOTO) the breaker to prevent accidental energization. 120V AC is present within the unit; exercise caution to avoid electrical shock.

Prevention:

Regularly clean the dishwasher's filter to prevent food particles from entering the drain pump. Avoid placing large or hard items in the dishwasher that could potentially damage the pump.

Expert Tip:

Some Maytag dishwashers have a service mode. You can often initiate a drain cycle directly from the service mode without running a full wash cycle. Consult the technical service manual for the exact button sequence, as it varies by model. Also, a little dish soap and hot water down the drain helps to clear any grease build up.

Frequently Asked Questions

•How do I access the drain pump on my Maytag dishwasher?

Typically, you need to remove the lower access panel and the toe kick panel. The drain pump is usually located at the base of the dishwasher. Some models require you to remove the entire dishwasher from under the counter.

•What voltage should I expect at the drain pump when it's activated?

You should expect to see approximately 120V AC when the drain pump is energized. Use a multimeter to verify this voltage.

•What is the typical lifespan of a dishwasher drain pump?

The lifespan of a dishwasher drain pump can vary, but generally, it lasts between 5 to 10 years, depending on usage and water quality. Frequent use and hard water can shorten its lifespan.

Maytag Dishwasher Loud Growling Noise During Drain Cycle: Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the drain pump on my Maytag dishwasher?

•What voltage should I expect at the drain pump when it's activated?

•What is the typical lifespan of a dishwasher drain pump?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: