Amana Washer Sensing Light Flashing: Won't Fill With... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) monitors various sensors and switches, including the water level pressure switch, lid switch, and water inlet valve. When the MCU detects an anomaly, like an open lid switch or no water level change after initiating the fill cycle, it may trigger the flashing sensing light and halt the operation. The MCU sends 120V AC to the water inlet valve to initiate filling. The pressure switch reports the water level to the MCU.

Symptoms:

The Amana washer's sensing light is flashing, and the washer will not fill with water. The cycle may start, but no water enters the drum.

Possible Causes:

Water inlet valve failure
Clogged inlet hoses or screens
Pressure switch malfunction
Lid switch issue
Main Control Unit (MCU) fault
Wiring harness damage

Solution:

1

Turn off the breaker to the washer.
2

Inspect the inlet hoses for kinks or clogs. Disconnect them from the washer and check the screens for debris.
3

Use a multimeter to test the water inlet valve for continuity. You should typically see a resistance between 500 and 1500 ohms. If open or shorted, replace the valve.
4

Check the lid switch for proper operation. With the lid closed, it should show continuity. If not, replace the lid switch.
5

Disconnect and inspect the pressure switch hose for clogs or damage. Blow through the hose to ensure it's clear. Verify the switch is switching states.
6

Reconnect the power and check the voltage to the water inlet valve when the washer should be filling. You should see 120V AC. If there is voltage but no fill, replace the inlet valve.
7

As a last resort, consider replacing the main control unit (MCU) if all other components test good. This is uncommon, but possible.

Safety Warning:

Disconnect power to the washer at the breaker panel before any disassembly or testing. High voltage is present when the unit is powered on. Use proper LOTO (Lock Out/Tag Out) procedures.

Prevention:

Regularly inspect and clean the inlet hose screens. Avoid overloading the washer. Check hoses for wear. Run a washer cleaner cycle monthly.

Expert Tip:

Some Amana washers have a diagnostic mode accessible by pressing certain button combinations. Consult the service manual to check for stored error codes, which can pinpoint the problem more accurately. A common sequence is Power/Cancel, then hold the Start button for 5 seconds.

Frequently Asked Questions

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

Accessing the diagnostic mode varies depending on the specific model. Check the service manual or search online using your model number. A common sequence involves pressing specific buttons in a sequence, such as Power/Cancel followed by holding the Start button.

•What is the proper voltage I should see at the water inlet valve when the washer is trying to fill?

You should measure approximately 120V AC at the water inlet valve terminals when the washer is actively attempting to fill with water. No voltage indicates a potential wiring issue or a problem with the MCU.

•Where is the pressure switch located on my Amana washer?

The pressure switch is typically located near the bottom of the washer cabinet, connected to the outer tub via a small hose. It may be accessible from the front or rear panel, depending on the model.

Amana Washer Sensing Light Flashing: Won't Fill With Water Troubleshooting

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 is the proper voltage I should see at the water inlet valve when the washer is trying to fill?

•Where is the pressure switch located on my Amana washer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: