Amana Washer Fills and Immediately Drains: Troubleshootin... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) controls all washer functions. The water level pressure switch signals the MCU when the proper water level is reached. The MCU then closes the drain valve and allows the wash cycle to begin. If the drain valve is open prematurely, or the water level is not properly sensed, the MCU will not proceed to the next cycle stage.

Symptoms:

The Amana washer fills with water as expected, but almost immediately begins to drain out at the same time or shortly after filling starts. The wash cycle may not start properly. The drum might not agitate or spin.

Possible Causes:

Incorrect drain hose system
Faulty drain valve
Clogged drain pump or drain line
Defective water level pressure switch
Damaged Main Control Unit (MCU)

Solution:

1

Unplug the Amana washer from the 120V AC outlet.
2

Inspect the drain hose connection to the drain standpipe. Ensure it's not pushed in too far (no more than 6 inches) and has an air gap to prevent siphoning. The top of the standpipe should be at least 30 inches above the floor.
3

Check the drain valve (located at the pump). Using a multimeter, test for continuity when the washer is off. If there's continuity, the valve is likely stuck open or defective.
4

Remove the drain pump. Inspect for obstructions like socks or debris. Check the pump impeller spins freely.
5

Verify water level pressure switch. Use a multimeter to check continuity. Blow into pressure switch hose. Confirm it toggles the switch.
6

If all other components test ok, suspect a faulty MCU. Replace the MCU with a new, compatible Amana part. Consult a wiring diagram. Use a 1/4-inch nut driver to remove the control panel.

Safety Warning:

Disconnect power before servicing. Lock Out / Tag Out (LOTO) procedures are mandatory. Capacitors can store high voltage even after the unit is unplugged. Use caution when working around electrical components.

Prevention:

Regularly check and clean the drain pump filter. Avoid overloading the washer. Use the correct amount of detergent. Inspect drain hose regularly.

Expert Tip:

Many Amana washers have a diagnostic mode. To access, consult the service manual. It often involves pressing a combination of buttons within a short time frame. This mode can display error codes and allow for component testing.

Frequently Asked Questions

•How do I access the diagnostic mode on my Amana washer?

The diagnostic mode entry sequence varies by model. Consult the service manual for your specific Amana washer. Often, it involves pressing a specific sequence of buttons (e.g., start/pause, power, cycle select) within a short timeframe.

•What voltage should I expect to see at the drain valve when it's supposed to be activated?

You should expect to see approximately 120V AC at the drain valve terminals when the control board is signaling it to open.

•Where is the water level pressure switch located, and how do I test it properly?

The water level pressure switch is typically located near the bottom of the washer cabinet, connected to the tub with a small rubber hose. To test it, disconnect the hose and use a multimeter to check for continuity between the terminals. Then, gently blow into the hose while monitoring the multimeter; the continuity should change state, indicating the switch is working.

Amana Washer Fills and Immediately Drains: Troubleshooting & Fixes

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the diagnostic mode on my Amana washer?

•What voltage should I expect to see at the drain valve when it's supposed to be activated?

•Where is the water level pressure switch located, and how do I test it properly?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: