Amana Washer Not Finishing Cycle: Troubleshooting Guide... | appliancefaults.com

Technical Background:

The Amana washer uses a Motor Control Unit (MCU) to manage the wash cycle. The MCU relies on feedback from various sensors (pressure switch, door lock, motor speed sensor) to determine the stage of the cycle. Voltage paths from these sensors provide status updates to the MCU. A malfunction in any of these sensors can cause the MCU to revert to the sensing mode.

Symptoms:

The Amana washer fills with water, starts the wash cycle, but then gets stuck. It doesn't proceed through the rinse and spin cycles. The control panel light indicates it's in 'sensing' mode repeatedly.

Possible Causes:

Clogged drain pump or drain hose
Faulty pressure switch or sensor
Defective door lock switch
Motor control unit (MCU) malfunction
Water inlet valve issues
Load Imbalance detected by the MCU

Solution:

1

Unplug the washer from the 120V AC outlet and turn off the water supply valves.
2

Check the drain hose for kinks or clogs. Disconnect the hose and inspect for obstructions.
3

Inspect the drain pump filter for debris. Remove the filter and clean it thoroughly.
4

Access the pressure switch (typically near the top of the washer) and test for continuity with a multimeter. A working switch should show continuity when the tub is empty and none when full.
5

Examine the door lock switch for proper function. Use a multimeter to test for continuity when the door is locked. Replace if faulty. Verify 120V AC power to the door lock.
6

Check the motor control unit (MCU) for any visible signs of damage. Replace the MCU if necessary. This often requires licensed technician diagnosis.
7

Inspect the water inlet valve solenoids for proper operation. Use a multimeter to check for resistance across the terminals. A typical reading is between 500-1500 ohms.

Safety Warning:

Always disconnect power (LOTO - Lock Out Tag Out) to the appliance before performing any repairs. Some components operate at 120V AC, which can cause electrocution.

Prevention:

Regularly clean the drain pump filter (every 3-6 months) to prevent clogs. Avoid overloading the washer, as this can strain the motor and sensors. Use the correct amount of detergent.

Expert Tip:

Many Amana washers have a diagnostic mode. To enter service mode, with the washer unplugged, plug it back in while pressing and holding the start/pause button. Then cycle the knob to retrieve error codes, this may differ slightly depending on the model.

Frequently Asked Questions

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

The pressure switch is typically located at the top of the washer, near the water inlet valve. It's usually connected to the tub via a small rubber hose.

•How do I know if my motor control unit (MCU) is bad?

A faulty MCU can cause a variety of problems, including the washer not starting, not completing cycles, or displaying error codes. However, it is often best to test the easier components first before replacing the MCU, as it is often a more expensive part. Typically the LED screen on the console will not light up or will have scrambled codes.

•What resistance should I expect to see across the terminals of the water inlet valve solenoids?

You should typically see between 500 and 1500 ohms across the terminals of the water inlet valve solenoids. If you see significantly lower or higher resistance, the solenoid may be faulty.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

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

•How do I know if my motor control unit (MCU) is bad?

•What resistance should I expect to see across the terminals of the water inlet valve solenoids?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: