Speed Queen Washing Machine Won't Start: Troubleshooting... | appliancefaults.com

Technical Background:

The washing machine's operation is controlled by the MCU, which monitors various sensors and controls the motor. A start signal must be received by the MCU, along with confirmation from the lid switch or door lock, for the wash cycle to initiate. Voltage must pass through these safety devices to the MCU.

Symptoms:

The Speed Queen washing machine is plugged in and the power indicator light is on, but the washer does not start when the start button is pressed. No motor activity or error codes are displayed.

Possible Causes:

Defective lid switch
Faulty door lock mechanism
Tripped thermal overload protector on the motor
Malfunctioning motor control unit (MCU)
Wiring harness issues
Defective start capacitor (if applicable)

Solution:

1

Disconnect power to the washing machine at the breaker panel (LOTO).
2

Check the power cord and outlet using a multimeter to ensure 120V AC is present.
3

Inspect the lid switch or door lock assembly for continuity using a multimeter. Replace if faulty.
4

Locate the motor. If equipped with a thermal overload protector, check for continuity. Reset if tripped, replace if open.
5

Access the motor control unit (MCU). Use a wiring diagram to check for proper voltage inputs and outputs. Replace the MCU if necessary.
6

Examine the wiring harness for any loose connections, frayed wires, or signs of damage. Repair or replace as needed.
7

If the washer has a start capacitor, test it with a capacitance meter. Replace if outside of its specified range.

Safety Warning:

Disconnect power to the washing machine before performing any repairs. High voltage is present in the control panel. Use proper lockout/tagout (LOTO) procedures to prevent accidental energization.

Prevention:

Regularly clean the lint filter. Inspect hoses for leaks and cracks annually. Avoid overloading the washer to prevent motor strain. Check and tighten the motor mount bolts periodically.

Expert Tip:

Many Speed Queen washers have a diagnostic mode. To enter it, simultaneously press and hold the Start/Pause and Cycle Selector buttons for 3 seconds while the unit is plugged in. The control panel lights will illuminate, allowing you to retrieve error codes and test components. Use the cycle selector knob to navigate the diagnostic options, using the start button to initiate a test and the power button to exit.

Frequently Asked Questions

•Where is the lid switch located on my Speed Queen?

The lid switch is typically located on the top of the washer cabinet near the lid hinge. It can be accessed by removing the top panel of the washer, usually held in place by screws at the back.

•How do I reset the thermal overload protector on the motor?

The thermal overload protector is usually a small button located on the motor housing. Allow the motor to cool down completely, then press the button firmly to reset it. If it trips again quickly, it indicates a motor problem.

•How do I find a wiring diagram for my Speed Queen washer model?

Wiring diagrams are typically included in the service manual for your specific Speed Queen model. You can often find these manuals online at the Speed Queen website or appliance parts retailers, by searching for your specific model number.

Speed Queen Washing Machine Won't Start: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where is the lid switch located on my Speed Queen?

•How do I reset the thermal overload protector on the motor?

•How do I find a wiring diagram for my Speed Queen washer model?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: