Frigidaire Washer Error Code E5E: Communication Bus... | appliancefaults.com

Technical Background:

error code E5E indicates a communication fault between the main control board (MCU) and the motor control board. The MCU sends signals to the motor control board to control motor functions. This communication happens through a data bus, which uses low voltage DC signals. A break in the communication path, voltage fluctuations, or a faulty board can trigger the error.

Symptoms:

The homeowner reports the washer stopped mid-cycle and is displaying error code E5E on the control panel. The washer may not start, or it may fill but not agitate or spin.

Possible Causes:

Loose wiring harness connections between the main control board and the motor control board.
Damaged wiring in the communication bus.
Defective main control board (MCU).
Faulty motor control board.
Power supply fluctuations affecting board communication.

Solution:

1

Disconnect power to the washer at the breaker panel.
2

Locate the main control board and the motor control board, usually behind the control panel and near the motor, respectively.
3

Inspect wiring harnesses connecting the two boards. Check for loose connections, corrosion, or damage. Reseat connectors securely.
4

Use a multimeter to check the continuity of the communication wires between the boards. A reading of infinite resistance indicates a broken wire.
5

With the washer still disconnected from power, carefully inspect the main control board and motor control board for any signs of burnt components.
6

Reconnect power and monitor voltage at the communication bus. The expected voltage is typically around 5V DC. Measure with a multimeter.
7

If the wiring and connections are good, suspect a faulty main control board or motor control board. Replacement may be required.

Safety Warning:

Always disconnect power to the appliance at the breaker panel before performing any troubleshooting or repairs. High voltage is present within the appliance, and failure to disconnect power can result in serious injury or death. Follow Lock-Out/Tag-Out (LOTO) procedures.

Prevention:

Regularly inspect the wiring harness connections during routine maintenance. Ensure the power outlet is properly grounded to prevent voltage fluctuations. Avoid overloading the washer.

Expert Tip:

Many Frigidaire washers have a service mode that allows you to run diagnostic tests and check error history. Refer to the service manual for the specific sequence to enter service mode on your model. This can provide more detailed information about the E5E error and help pinpoint the faulty component.

Frequently Asked Questions

•What is the typical DC voltage on the communication bus when it's functioning correctly?

Typically, the DC voltage on a functioning communication bus is around 5V DC. However, consult the service manual for the specific voltage range for your model.

•How do I identify the main control board and the motor control board?

The main control board is usually located behind the control panel and is the largest board. The motor control board is typically found near the motor and may be mounted to the motor housing. Refer to the wiring diagram for your specific model.

•If the wiring and connections are good, is there a way to test the control boards before replacing them?

While component-level testing of the control boards requires specialized equipment and knowledge, you can sometimes check for obvious signs of damage, such as burnt components or bulging capacitors. However, in most cases, if the wiring is good and the error persists, replacement of one or both boards is the recommended course of action.

Frigidaire Washer Error Code E5E: Communication Bus Fault Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical DC voltage on the communication bus when it's functioning correctly?

•How do I identify the main control board and the motor control board?

•If the wiring and connections are good, is there a way to test the control boards before replacing them?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: