Speed Queen Washer: Troubleshooting Soap Residue on... | appliancefaults.com

Technical Background:

MCU logic and voltage paths.
The Speed Queen washer relies on its Main Control Unit (MCU) to regulate the water fill, wash, and rinse cycles. The MCU controls the water inlet valve based on signals from the pressure switch and timer settings. If the water pressure is inadequate or the water inlet valve malfunctions, the proper amount of water may not enter the machine for rinsing. The pressure switch signals the MCU when the tub is full. A faulty pressure switch can cause overfilling or underfilling, leading to poor rinsing. Voltage paths from the MCU to the water inlet valve must be intact for the valve to open.

Symptoms:

US homeowner observations.
Clothes are coming out of the wash with visible soap residue. Clothes feel stiff or sticky after washing. Excessive suds are present in the wash or rinse cycle. A lingering detergent smell remains on the clothes.

Possible Causes:

Low water pressure.
Incorrect detergent usage.
Clogged dispenser.
Drain hose issues.
Defective water inlet valve.
Malfunctioning pressure switch.

Solution:

1

Check the water pressure to the washing machine using a pressure gauge connected to the water inlet hose. Minimum pressure should be 20 PSI.
2

Inspect the detergent dispenser for clogs or buildup. Remove the dispenser and clean thoroughly with warm water and a brush.
3

Verify the drain hose is not kinked or obstructed. Ensure the drain hose is properly inserted into the standpipe and not extending too far down.
4

Examine the water inlet valve for proper operation. Use a multimeter to check for continuity when the valve is energized (120V AC). Replace if defective.
5

Test the pressure switch for proper operation. Use a multimeter to check for continuity. Blow into the pressure switch tube to simulate a full tub and verify the switch changes state.
6

Run a cleaning cycle with a washing machine cleaner to remove any buildup in the tub or pipes.
7

Confirm the correct amount and type of detergent is being used according to the manufacturer's instructions.

Safety Warning:

LOTO and high voltage warning.
Disconnect power to the washing machine at the breaker panel before performing any repairs. Lockout/Tagout (LOTO) procedures must be followed to prevent accidental energization. High voltage is present in the control panel. Use caution when testing electrical components.

Prevention:

Specific maintenance.
• Regularly clean the detergent dispenser to prevent clogs.
• Use the correct amount and type of detergent as recommended by the manufacturer.
• Inspect the water inlet hoses for kinks or damage.
• Check the drain hose for proper placement and obstructions.
• Periodically run a cleaning cycle with a washing machine cleaner.

Expert Tip:

Trade secret or service mode sequence.
To access the diagnostic mode on most Speed Queen washers, simultaneously press and hold the Start/Pause and Cycle Selector buttons for 3 seconds. This will allow you to view error codes and run diagnostic tests.

Frequently Asked Questions

•What is the correct water pressure for a Speed Queen washer?

The correct water pressure should be between 20 and 120 PSI. Lower pressures can cause rinsing issues.

•How often should I clean the detergent dispenser?

The detergent dispenser should be cleaned at least once a month, or more frequently if you notice buildup.

•What type of detergent is best for a Speed Queen washer?

High-efficiency (HE) detergent is recommended for most Speed Queen washers. Using non-HE detergent can cause excessive suds and rinsing problems.

Speed Queen Washer: Troubleshooting Soap Residue on Clothes

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct water pressure for a Speed Queen washer?

•How often should I clean the detergent dispenser?

•What type of detergent is best for a Speed Queen washer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: