Roper Washer: Wash and Rinse Lights Flashing -... | appliancefaults.com

Technical Background:

The MCU (Motor Control Unit) controls the various functions of the washer based on input from sensors and user selections. The flashing wash and rinse lights indicate a fault code, usually related to a sensor or component failure. The MCU monitors voltage paths and resistance values to detect problems. If a value is out of range or a signal is missing, the MCU will trigger the error code.

Symptoms:

The wash and rinse lights on your Roper washing machine are flashing simultaneously. The washer may not start, fill, agitate, or drain properly. You may also hear unusual noises or no noise at all.

Possible Causes:

Lid switch malfunction or failure.
Motor control unit (MCU) failure.
Wiring harness issue between the MCU and other components.
Water level sensor malfunction.
Clogged drain pump or drain hose.
Obstruction in the water inlet valve.

Solution:

1

Unplug the washer from the 120V AC outlet.
2

Check the lid switch for proper operation. Use a multimeter to test continuity when the lid is closed. Replace if faulty.
3

Inspect the wiring harness connecting the MCU to the lid switch, motor, and water level sensor for any loose connections or damage. Repair or replace as needed.
4

Examine the drain pump and drain hose for clogs. Remove any obstructions.
5

Test the water level sensor. Disconnect the sensor and use a multimeter to check the resistance. Refer to the service manual for the correct resistance range. Replace if out of range.
6

Inspect the water inlet valve screens for debris and clean them.
7

If all other components check out, replace the MCU. This is often the root cause of this error.

Safety Warning:

Disconnect the power supply to the washer before performing any repairs. Lock Out/Tag Out (LOTO) procedures should be followed to prevent accidental energization. Some components may retain an electrical charge even after the power is disconnected. Use caution when working with electrical components.

Prevention:

Regularly clean the lint filter and check the drain hose for kinks or clogs. Avoid overloading the washer, as this can strain the motor and other components. Use the correct type and amount of detergent. Periodically inspect the water inlet hoses for leaks or damage and replace them as needed.

Expert Tip:

Sometimes, a simple reset can clear the error code. Unplug the washer for 5 minutes, then plug it back in. This may temporarily resolve the issue, but if the problem persists, further diagnosis is required. Refer to the technical sheet, located either behind the front panel or inside the control console for the specific error code and diagnostic steps for this model.

Frequently Asked Questions

•Where is the lid switch located and how do I test it?

The lid switch is typically located under the washer lid, near the hinge. Use a multimeter set to continuity. With the washer unplugged, depress the switch manually. You should have continuity when the switch is depressed and no continuity when it's released.

•How do I access and test the water level sensor?

The water level sensor is usually located at the bottom of the washer tub, accessible from the back panel. Unplug the washer. Disconnect the wires from the sensor. Use a multimeter to check the resistance. Refer to the service manual or technical sheet for the specific resistance values for different water levels.

•Where can I find a replacement MCU for my Roper washer?

You can find replacement MCUs at appliance parts retailers, both online and in brick-and-mortar stores. Be sure to have your washer's model number handy to ensure you get the correct replacement part. Websites like AppliancePartsPros.com or RepairClinic.com are good resources.

Roper Washer: Wash and Rinse Lights Flashing - Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where is the lid switch located and how do I test it?

•How do I access and test the water level sensor?

•Where can I find a replacement MCU for my Roper washer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: