Amana Dishwasher Growling Noise During Drain Cycle:... | appliancefaults.com

Technical Background:

The MCU (Main Control Unit) sends a 120V AC signal to the drain pump motor during the drain cycle. The pump then evacuates the water from the dishwasher tub through the drain hose. Resistance or obstruction in the drain system or a faulty pump can cause increased noise and potential failure.

Symptoms:

The Amana dishwasher is producing a loud growling noise specifically during the drain cycle. The noise is unusual and louder than normal operation.

Possible Causes:

Foreign object obstructing the drain pump impeller.
Worn or damaged drain pump motor bearings.
Drain hose partially blocked or kinked.
Air lock in the drain system.
Defective drain pump motor capacitor.

Solution:

1

Unplug the dishwasher from the outlet or turn off the breaker at the breaker panel.
2

Inspect the drain hose for kinks or obstructions. Straighten any kinks and remove any visible debris.
3

Locate the drain pump (usually at the bottom of the dishwasher). Disconnect the hoses connected to the pump. Check for any obstructions in the pump housing or impeller.
4

Use a multimeter to test the drain pump motor for continuity. A reading of infinite resistance indicates a failed motor. Check voltage to the drain pump during the drain cycle, should read 120V AC.
5

Check the drain pump capacitor (if equipped) with a capacitance meter. Replace if out of specification.
6

If no obstructions are found and the motor tests good, suspect a worn-out drain pump. Replace the drain pump assembly.
7

Reassemble the dishwasher and plug it back in or turn the breaker back on. Run a test cycle to verify the repair.

Safety Warning:

Always disconnect power to the dishwasher before performing any repairs. Use proper Lock-Out/Tag-Out (LOTO) procedures to prevent accidental power-up. Be aware of potentially exposed 120V AC wiring.

Prevention:

Regularly clean the dishwasher filter to prevent food particles from entering the drain pump. Avoid placing large or hard food scraps into the dishwasher. Occasionally run a dishwasher cleaner through a cycle to remove buildup.

Expert Tip:

Many Amana dishwashers have a service mode. Holding down the 'Start/Cancel' button for 5 seconds, then pressing 'Hi Temp Wash' may initiate a diagnostic cycle, including a drain cycle, allowing you to observe the pump's operation without a full wash cycle.

Frequently Asked Questions

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

Accessing the drain pump usually involves removing the lower access panel or kickplate. You may also need to remove the lower spray arm and filter assembly. Consult your appliance's service manual if available.

•What is the correct capacitance value for the drain pump capacitor?

The correct capacitance value should be printed on the capacitor itself. Typical values range from 4 to 10 microfarads. Replace with a capacitor of the same voltage and capacitance.

•Where can I purchase a replacement drain pump for my Amana dishwasher?

Replacement drain pumps can be purchased from appliance parts retailers, both online and at local supply stores. Be sure to have your dishwasher's model number handy to ensure you get the correct part.

Amana Dishwasher Growling Noise During Drain Cycle: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

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

•What is the correct capacitance value for the drain pump capacitor?

•Where can I purchase a replacement drain pump for my Amana dishwasher?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: