Speed Queen Washer: Cycle Time Increasing Troubleshooting... | appliancefaults.com

Technical Background:

MCU logic and voltage paths.
The Speed Queen washer's Motor Control Unit (MCU) monitors water levels, motor speed, and cycle progress. It uses sensors to track these parameters and adjusts cycle time accordingly. The MCU receives input from the pressure sensor (water level), motor speed sensor (motor RPM), and timer module. Voltage is supplied to the MCU via the main power supply board and distributed to components like the drain pump, water inlet valve, and motor.

Symptoms:

US homeowner observations.
The washer's cycle time displayed keeps increasing during operation. The clothes may still be clean, but the cycle takes much longer than usual.

Possible Causes:

Clogged drain pump filter restricting water outflow.
Defective pressure sensor inaccurately sensing water level.
Faulty water inlet valve filling the tub slowly.
Issues with the motor control unit (MCU) or its programming.
Worn drive belt causing the motor to struggle and extend cycle time.
Obstruction in the drain hose or standpipe.

Solution:

1

Disconnect power to the washer at the breaker panel. Verify no voltage is present at the wall outlet using a multimeter. Should read 0V AC.
2

Inspect the drain pump filter for obstructions. Remove any debris and ensure the pump impeller spins freely.
3

Check the water inlet valve screens for sediment buildup. Clean the screens to ensure adequate water flow. Verify 120V AC is present at the valve during fill cycle using a multimeter.
4

Examine the pressure sensor hose for kinks or blockages. Disconnect the hose and blow through it to confirm it is clear.
5

Inspect the drive belt for wear or damage. Replace the belt if necessary. Tension should feel firm, but not overly tight.
6

Reconnect power and run a calibration cycle, if available, according to the service manual. Document cycle time before and after calibration.
7

If the problem persists, the motor control unit (MCU) may be faulty and require replacement. Consult the service manual for diagnostic procedures and replacement guidelines.

Safety Warning:

Always disconnect power to the washer before performing any repairs. Lock Out/Tag Out (LOTO) procedures must be followed to prevent accidental energization. High voltage is present within the appliance. Work should be performed by a qualified technician.

Prevention:

Regularly clean the drain pump filter (every 3 months). Use high-efficiency (HE) detergent in the correct amount. Inspect water inlet valve screens annually. Ensure the washer is level and properly supported.

Expert Tip:

Speed Queen washers have a service mode accessible by pressing and holding specific buttons in a sequence (consult the service manual). This mode allows for diagnostic tests and error code retrieval.

Frequently Asked Questions

•Where is the pressure sensor located on my Speed Queen washer?

The pressure sensor is typically located near the bottom of the outer tub, connected to a small hose. Consult your service manual for specific location details.

•How do I access the drain pump filter on my Speed Queen washer?

The drain pump filter is usually accessible from the front of the machine, behind a small access panel near the bottom. You may need a flathead screwdriver to open the panel.

•What voltage should I expect to see at the water inlet valve when it is activated?

You should expect to see approximately 120V AC at the water inlet valve when it is actively filling the tub.

Speed Queen Washer: Cycle Time Increasing Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where is the pressure sensor located on my Speed Queen washer?

•How do I access the drain pump filter on my Speed Queen washer?

•What voltage should I expect to see at the water inlet valve when it is activated?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: