Maytag Washer: Motor Capacitor Failure Symptoms and... | appliancefaults.com

Technical Background:

The Maytag washer's motor control unit (MCU) uses triacs to control the voltage supplied to the motor windings. The motor capacitor provides a phase shift to create the necessary starting torque for the motor. The MCU relies on feedback from the motor to regulate speed and detect faults. Voltage paths from the MCU to the motor pass through the wiring harness and connectors.

Symptoms:

US homeowners report symptoms such as a humming sound when the washer attempts to start, a slow or weak spin cycle, or the washer failing to spin at all. Some might also observe the washer stopping mid-cycle or an error code related to motor function.

Possible Causes:

Failed motor capacitor
Corroded capacitor terminals
Faulty motor windings
Triac failure on the control board (MCU)
Wiring harness damage between the MCU and motor
Overloaded washer (excessive weight)

Solution:

1

Unplug the washer from the outlet.
2

Locate the motor capacitor. It's typically near the motor or attached to the washer frame. It may be cylindrical.
3

Discharge the capacitor using an insulated screwdriver by shorting the terminals. Use extreme caution.
4

Disconnect the capacitor and visually inspect it for bulging, leaking, or physical damage.
5

Test the capacitor with a multimeter set to capacitance. Compare the reading to the capacitor's rated value. Replace if the reading is significantly off (e.g., 20% or more).
6

If the capacitor tests good, inspect the motor windings for continuity using a multimeter. Open windings indicate a motor failure.
7

If both the capacitor and motor windings are good, inspect the control board (MCU) for burnt or damaged components, especially around the motor control triacs. If damage is evident, the control board likely needs replacement.

Safety Warning:

Disconnect power to the appliance before performing any repairs. Lockout/Tagout (LOTO) procedures should be followed. Capacitors store high voltage, even after the appliance is unplugged. Discharge the capacitor before handling it.

Prevention:

Avoid overloading the washer. Regularly inspect the wiring harness for damage. Consider using a surge protector for the washer's outlet. Clean the lint filter after each load to reduce strain on the motor.

Expert Tip:

Many Maytag washers have a diagnostic mode. To access it, typically you press and hold Start/Pause for 3 seconds, then select a cycle, and press Start/Pause again. Consult the service manual for the exact sequence for your model. This will allow you to read error codes and perform motor tests.

Frequently Asked Questions

•What is the correct capacitance value for my Maytag washer's motor capacitor?

The capacitance value is printed directly on the capacitor label. It's usually expressed in microfarads (µF). Consult the washer's service manual or the capacitor itself for the correct value.

•How do I safely discharge a motor capacitor?

Use an insulated screwdriver with a well-insulated handle. Carefully short the terminals of the capacitor. This will discharge any stored energy. Exercise extreme caution as capacitors can hold a dangerous charge.

•Where can I find a replacement motor capacitor or control board for my Maytag washer?

You can find replacement parts at appliance parts retailers, online marketplaces, or directly from Maytag's authorized parts distributors. Make sure to order the correct part number for your washer model.

Maytag Washer: Motor Capacitor Failure Symptoms and Control Board Diagnosis

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct capacitance value for my Maytag washer's motor capacitor?

•How do I safely discharge a motor capacitor?

•Where can I find a replacement motor capacitor or control board for my Maytag washer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: