Roper Washer Sensing Light Flashing: Won't Fill... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) monitors the water level sensor, inlet valve, and other components. When the MCU detects an issue, such as a lack of water fill, it can trigger the sensing light to flash as an error indicator. The MCU controls the 120V AC path to the water inlet valve solenoid based on the signal from the water level sensor.

Symptoms:

The Roper washer's sensing light is flashing, and the machine is not filling with water. The washer may be unresponsive or making unusual noises.

Possible Causes:

Clogged Inlet Hoses
Defective Water Inlet Valve
Faulty Water Level Sensor (Pressure Switch)
Malfunctioning Main Control Unit (MCU)
Air Lock in Drain Line
Blocked Coin Trap

Solution:

1

Disconnect power to the washer at the breaker panel.
2

Inspect and clean both the hot and cold water inlet hoses for kinks or blockages.
3

Using a multimeter, test the water inlet valve solenoid for continuity. A reading of approximately 1k to 2k ohms is expected. If open, replace the valve.
4

Check the water pressure to the inlet valve, should be around 20-120 PSI.
5

Inspect the water level pressure switch and the air dome (hose) to it for blockage.
6

Check the drain hose for proper height and no blockage. The end of the hose should be below the top of the washer, but not submerged in the drain. Creating an airlock can stop fill.
7

If all components test good, replace the Main Control Unit (MCU).

Safety Warning:

Always disconnect power to the washer at the breaker panel before performing any repairs. Lock Out Tag Out (LOTO) procedures should be followed to prevent accidental power restoration. Be aware of potential 120V AC shock hazards when testing electrical components.

Prevention:

Regularly inspect and clean the inlet hoses. Check the coin trap periodically for debris. Use a water softener if you have hard water.

Expert Tip:

Some Roper washers have a diagnostic mode. To access it, rapidly rotate the cycle selector knob three clicks clockwise, then two clicks counter-clockwise, and finally one click clockwise, all within 6 seconds. Error codes may then be displayed via the indicator lights.

Frequently Asked Questions

•What voltage should I expect to see at the water inlet valve when the washer is trying to fill?

You should see approximately 120V AC at the water inlet valve terminals when the washer is attempting to fill. If you are not seeing voltage, the issue could be with the control board or wiring.

•How do I check the water level sensor?

Disconnect the air hose from the water level sensor. Gently blow into the hose while using a multimeter to check for continuity across the sensor terminals. The continuity should change as you apply pressure. If the sensor doesn't respond, it may be defective.

•Where is the coin trap located, and how do I clean it?

The coin trap is typically located at the bottom front of the washer behind an access panel or near the pump. To clean it, disconnect power and remove the access panel. Carefully unscrew or unclip the coin trap cover and remove any debris. Reinstall the cover and access panel.

Roper Washer Sensing Light Flashing: Won't Fill Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What voltage should I expect to see at the water inlet valve when the washer is trying to fill?

•How do I check the water level sensor?

•Where is the coin trap located, and how do I clean it?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: