GE Washer Error Code 71: Motor Communication Fault... | appliancefaults.com

Technical Background:

error code 71 indicates a failure in communication between the main control unit (MCU) and the motor. The MCU sends signals to the motor to control its speed and direction. This communication typically occurs through a serial data line. A problem in this communication pathway, whether voltage or data related, throws the error. The board uses low voltage DC and line voltage AC to communicate.

Symptoms:

The washer displays error code 71 and may not start, spin, or agitate. The motor may make unusual noises or not run at all. The control panel might freeze or become unresponsive.

Possible Causes:

Faulty motor control unit (MCU)
Wiring harness damage between the MCU and motor
Defective motor
Loose or corroded connections
Software glitch in the MCU
Excessive vibration causing intermittent connection issues

Solution:

1

Disconnect power to the washer at the breaker panel.
2

Locate the motor control unit (MCU), typically behind the control panel or near the motor. Refer to the washer's service manual for specific location.
3

Inspect the wiring harness between the MCU and the motor for any visible damage, such as cuts, pinches, or burns.
4

Use a multimeter to check the continuity of each wire in the harness. Repair or replace any damaged wires. Also, verify proper voltage to the MCU - typically 120V AC at the input.
5

Check the connections at both the MCU and the motor. Ensure they are clean, tight, and free of corrosion. Use electrical contact cleaner if necessary.
6

Reconnect the power and check the voltage at the motor connector. You should typically see around 120V AC when the motor is supposed to be running. Consult the service manual for specific voltage requirements.
7

If the wiring and connections are good, the MCU or motor may be faulty. Replace the MCU first, as it is typically less expensive than the motor. If the problem persists, replace the motor.

Safety Warning:

Disconnect power to the washer at the breaker panel before performing any repairs. Use proper Lock-Out/Tag-Out (LOTO) procedures to prevent accidental re-energizing of the circuit. High voltage is present inside the appliance.

Prevention:

Periodically inspect the wiring harness and connections for any signs of damage or corrosion. Ensure the washer is level to prevent excessive vibration. Avoid overloading the washer.

Expert Tip:

Some GE washers have a diagnostic mode that can provide more detailed information about the error. To enter diagnostic mode, consult the service manual for the specific model. Typically, this involves pressing a specific sequence of buttons on the control panel.

Frequently Asked Questions

•Where exactly is the MCU located in my GE washer model?

The MCU location varies by model. Consult the specific service manual for your washer. It's usually behind the control panel or near the motor, accessible by removing the top or rear panel.

•How can I test the motor directly to see if it's the problem?

You can test the motor windings for continuity using a multimeter. A lack of continuity suggests a failed winding. However, this doesn't test the motor's ability to run under load. Refer to the service manual for specific resistance values. A licensed technician should do this test.

•What are the risks of ignoring error code 71?

Ignoring error code 71 can lead to further damage to the washer's components, such as the MCU or motor. It can also result in the washer becoming completely inoperable. In extreme cases, electrical issues could pose a fire hazard.

GE Washer Error Code 71: Motor Communication Fault Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where exactly is the MCU located in my GE washer model?

•How can I test the motor directly to see if it's the problem?

•What are the risks of ignoring error code 71?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: