Roper Washer Error Code 38: Pressure Transducer Air Tube... | appliancefaults.com

Technical Background:

error code 38 on a Roper washer typically indicates a problem with the pressure transducer circuit. The Main Control Unit (MCU) uses the pressure transducer to monitor the water level inside the tub. The transducer sends a voltage signal to the MCU that corresponds to the water pressure, and thus, the water level. If the MCU detects an abnormal voltage, it triggers error code 38.

Symptoms:

The Roper washer displays error code 38, and may not fill properly, overfill, or fail to start. The water level may not be accurate. The homeowner might also observe a slow or no drain issue.

Possible Causes:

Disconnected or loose air tube to the pressure transducer.
Kinked or blocked air tube.
Defective pressure transducer.
Faulty wiring harness or connection to the pressure transducer.
Clogged drain pump or drain line causing back pressure.
Main Control Unit (MCU) failure.

Solution:

1

Unplug the washer from the 120V AC outlet.
2

Locate the pressure transducer, typically near the bottom of the washer tub. You may need a 1/4-inch nut driver to remove access panels.
3

Inspect the air tube connected to the pressure transducer for any disconnections, kinks, or blockages. Blow through the tube to check for obstructions.
4

Reconnect the air tube securely to the pressure transducer and the tub. Replace the tube if damaged.
5

Check the wiring harness and connector to the pressure transducer for any damage or loose connections. Repair or replace as needed.
6

Use a multimeter to test the pressure transducer according to the service manual. Typical readings vary but look for open or shorted circuits. Expect to see around 5V DC.
7

Plug the washer back in and run a test cycle to see if the error code is cleared.

Safety Warning:

Disconnect power to the washer before attempting any repairs. Lock-out/Tag-out (LOTO) procedures must be followed. Some components operate at 120V AC, which can cause serious injury or death.

Prevention:

Regularly inspect the air tube for kinks or damage. Avoid overloading the washer, which can put excessive strain on the drain system and potentially affect the pressure readings.

Expert Tip:

Some Roper washers have a diagnostic mode that allows you to manually test the pressure transducer. To enter diagnostic mode, press and hold the Start/Pause button, then press the Power button. Refer to the service manual for specific test procedures.

Frequently Asked Questions

•What is the typical voltage range I should see from a working pressure transducer?

The voltage range typically varies with the water level. At empty, you might see around 0.5V DC, and at full, up to 4.5V DC. Consult the service manual for your specific model.

•How do I clear the error code 38 after fixing the issue?

In many cases, the error code will clear itself after the washer successfully completes a cycle without detecting the fault. You may also need to unplug the washer for a few minutes to reset the MCU.

•Where can I find the service manual for my Roper washer?

You can often find service manuals online by searching for your model number along with "service manual" or "repair manual." Websites like AppliancePartsPros or RepairClinic may offer these resources. Be sure it matches your model.

Roper Washer Error Code 38: Pressure Transducer Air Tube Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical voltage range I should see from a working pressure transducer?

•How do I clear the error code 38 after fixing the issue?

•Where can I find the service manual for my Roper washer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: