Speed Queen Washer: Troubleshooting Flashing Lights on... | appliancefaults.com

Technical Background:

The Speed Queen washer uses a main control unit (MCU) to manage the wash cycles. The MCU receives input from sensors and user selections and controls the motor, water valves, and drain pump. The user interface sends signals to the MCU. Voltage paths are critical between the power supply, MCU, user interface, and motor control circuitry. Errors are indicated via flashing lights, often a binary or coded display.

Symptoms:

The US homeowner reports that all or some of the lights on the Speed Queen washer's control panel are flashing continuously. The washer may not start, or it may stop mid-cycle.

Possible Causes:

Power supply issues
Door switch malfunction
Motor control unit (MCU) failure
User interface control board failure
Wiring harness problem
Software glitch

Solution:

1

Disconnect power to the washer at the breaker panel.
2

Inspect the power cord for damage. Replace if necessary.
3

Check the voltage at the wall outlet using a multimeter. It should read approximately 120V AC.
4

Access the control panel and visually inspect the user interface control board for burned components or loose connections.
5

Check the wiring harness connections between the user interface, the MCU, and the motor. Look for loose or corroded connections.
6

Using a 1/4-inch nut driver, tighten any loose ground connections.
7

If the issue persists, replace the user interface control board or the MCU. Order the correct part number for your model.

Safety Warning:

Disconnect power to the washer at the breaker panel before performing any repairs. Lock Out Tag Out (LOTO) procedures must be followed to prevent accidental re-energization of the circuit. High voltage is present when the washer is plugged in.

Prevention:

Regularly inspect the power cord for damage. Avoid overloading the washer. Clean the door seal to prevent leaks that can damage electrical components. Check the drain hose for kinks or clogs.

Expert Tip:

Many Speed Queen washers have a diagnostic mode. Consult the service manual for your specific model to access the diagnostic mode and retrieve error codes. This can help pinpoint the source of the problem. Often, pressing and holding two specific buttons while powering on the unit enters service mode.

Frequently Asked Questions

•How do I enter diagnostic mode on my Speed Queen washer?

The procedure varies by model. Consult your service manual or search online using your model number. Common methods involve pressing a combination of buttons (e.g., Start/Pause and Cycle Select) while powering on the unit.

•How do I determine if the MCU or the user interface board is faulty?

A process of elimination is required. Check all wiring and connections first. Then, if possible, use a multimeter to check for proper voltage at the input and output terminals of each board. If the voltage is correct, the board is likely faulty. Often, replacing the user interface board first is a good approach, as it is usually less expensive.

•Where can I find the service manual for my Speed Queen washer model?

You can often find service manuals online at appliance parts websites or dedicated service manual repositories. Search for your specific model number followed by 'service manual'. You may need to purchase a digital or printed copy.

Speed Queen Washer: Troubleshooting Flashing Lights on Panel

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I enter diagnostic mode on my Speed Queen washer?

•How do I determine if the MCU or the user interface board is faulty?

•Where can I find the service manual for my Speed Queen washer model?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: