Amana Washer Error Code LF: Long Fill Troubleshooting... | appliancefaults.com

Technical Background:

The MCU (Main Control Unit) monitors the water level via the pressure switch. If the water level doesn't reach the target within a specific timeframe, the MCU assumes a problem and displays the “LF” error. The MCU sends 120V AC to the water inlet valves to open them. The pressure switch provides feedback to the MCU about the water level.

Symptoms:

The Amana washer displays the “LF” error code during the fill cycle. The washer takes an excessively long time to fill or doesn't fill at all. You may hear the water running constantly, even after the tub should be full.

Possible Causes:

Faulty water inlet valve(s)
Clogged or kinked water supply hoses
Low water pressure to the home
Defective pressure switch/sensor
Problem with the drain hose (siphoning)
Malfunctioning control board (MCU)

Solution:

1

Unplug the washer from the outlet to cut power.
2

Inspect the water supply hoses for kinks or blockages. Ensure they are fully open. Check water pressure; should be at least 20 PSI.
3

Turn off the water supply at the wall. Disconnect the water inlet hoses from the washer.
4

Inspect the inlet valve screens for debris. Clean or replace if necessary. Use a 5/16-inch nut driver for removal.
5

Using a multimeter, check the water inlet valve solenoids for continuity. Resistance should be approximately 800-1200 ohms.
6

Reconnect the water hoses and turn the water supply back on. Check for leaks.
7

Plug the washer back in and run a test cycle. If the error persists, replace the water inlet valve or suspect a faulty pressure switch or MCU. If you suspect the pressure switch, check the continuity with a multimeter. The pressure switch should have continuity normally closed and open with pressure. If not, replace the pressure switch.

Safety Warning:

Disconnect power to the washer before performing any repairs (LOTO - Lock Out Tag Out). 120V AC is present when the washer is plugged in. Use caution when working with electrical components.

Prevention:

Periodically inspect and clean the water inlet valve screens (every 6 months). Ensure adequate water pressure to the home (above 20 PSI). Replace rubber hoses every 5 years to prevent bursting.

Expert Tip:

Many Amana washers have a diagnostic mode. To enter diagnostic mode, quickly press and release the Power/Cancel button, then press and release the Cycle Select button three times in a row within 5 seconds. This will allow you to run individual component tests, including the water inlet valves.

Frequently Asked Questions

•What is the acceptable water pressure range for an Amana washer?

The acceptable water pressure range is typically between 20 PSI and 100 PSI. Lower pressure can cause fill errors; higher pressure can damage the inlet valves.

•How do I test the pressure switch on an Amana washer?

Disconnect the air hose and electrical connector from the pressure switch. Use a multimeter to check for continuity across the terminals. Blow into the air inlet; the continuity should change when pressure is applied. If not, the pressure switch is faulty.

•Where is the water inlet valve located on my Amana washer?

The water inlet valve is typically located at the back of the washer, where the water supply hoses connect. It may be behind an access panel that needs to be removed.

Amana Washer Error Code LF: Long Fill Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the acceptable water pressure range for an Amana washer?

•How do I test the pressure switch on an Amana washer?

•Where is the water inlet valve located on my Amana washer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: