Amana Washer Drum Not Turning: Humming Motor... | appliancefaults.com

Technical Background:

The Amana washer uses a motor control unit (MCU) to regulate the motor speed and direction. The MCU receives signals from the control panel and sensors to determine the appropriate motor operation. Voltage flows from the breaker panel to the outlet, then to the washer's power cord, internal wiring harness, MCU, and motor. A capacitor often provides a boost for motor starting.

Symptoms:

The Amana washing machine is powered on, and you can hear the motor humming. However, the wash drum is not turning or rotating during the wash cycle.

Possible Causes:

Failed or worn drive belt
Defective motor capacitor
Worn or seized motor bearings
Obstruction in the wash tub or pump
Faulty motor control unit (MCU)
Damaged or disconnected wiring harness

Solution:

1

Unplug the washer from the outlet.
2

Remove the rear or front panel (depending on the model) to access the motor and drive components. Typically requires a 1/4-inch nut driver or 5/16-inch socket.
3

Inspect the drive belt for wear, cracks, or breakage. Replace if necessary. Belts are typically inexpensive.
4

Locate the motor capacitor (typically a cylindrical component near the motor). Discharge the capacitor using a resistor before testing. Use a multimeter to test the capacitor for proper capacitance (typically in microfarads). Replace if defective.
5

Check for obstructions in the wash tub by manually rotating the drum. Remove any visible items. Also, check the pump for obstructions. A small object in the pump can prevent motor starting.
6

Verify the voltage to the motor control unit (MCU). A typical reading would be 120V AC at the input.
7

Check the wiring harness connections to the motor and MCU for loose or damaged wires.

Safety Warning:

Always disconnect power (unplug the washer) before performing any repairs or inspections. Capacitors can store a dangerous electrical charge even when the appliance is unplugged. Use a resistor to safely discharge capacitors. Lock Out / Tag Out (LOTO) procedures should be followed.

Prevention:

Regularly inspect the drive belt for wear and tear. Avoid overloading the washer with excessive laundry to prevent strain on the motor and drive system. Clean the lint filter after each load to maintain proper drainage and prevent pump obstructions.

Expert Tip:

Some Amana washers have a service mode. To enter the service mode, simultaneously press and hold the start/pause and cycle select buttons for 3 seconds. This may display error codes that can help pinpoint the problem.

Frequently Asked Questions

•How do I discharge a capacitor safely?

Use a resistor with a value between 10k and 20k ohms and a wattage rating of at least 5 watts. Connect the resistor leads to the capacitor terminals for several seconds to discharge the stored energy.

•What is the correct drive belt part number for my Amana washer?

The correct drive belt part number depends on the specific model number of your Amana washer. Consult your washer's parts diagram or the manufacturer's website for the correct part number. You will need to know the model number.

•How do I test the motor windings for continuity?

Disconnect the motor from the wiring harness. Set your multimeter to the ohms setting. Touch the multimeter probes to each pair of motor terminals. A low resistance reading (close to zero ohms) indicates continuity. An open circuit (infinite resistance) indicates a broken winding.

Amana Washer Drum Not Turning: Humming Motor Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I discharge a capacitor safely?

•What is the correct drive belt part number for my Amana washer?

•How do I test the motor windings for continuity?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: