Admiral Washer Error Code F7E7: Motor Speed Fault... | appliancefaults.com

Technical Background:

The MCU monitors the motor speed via the tachometer signal. When the MCU commands the motor to reach a certain speed, it expects to see a corresponding signal from the tachometer. The F7E7 error indicates that the target motor speed was not reached within a specified timeframe. This can be caused by a variety of electrical and mechanical issues affecting the motor and its control circuitry.

Symptoms:

The washer displays the F7E7 error code and may not spin or agitate. The drum might remain stationary, or the washer may abruptly stop during a cycle.

Possible Causes:

Faulty motor control unit (MCU)
Defective motor
Wiring harness issues between the MCU and the motor
Obstruction in the motor preventing proper rotation
Tachometer malfunction on the motor
Overload condition causing motor to stall

Solution:

1

Disconnect power to the washer at the breaker panel.
2

Inspect the wiring harness between the motor and the MCU for any signs of damage (fraying, burning, or loose connections).
3

Use a multimeter to test the motor windings for continuity. A lack of continuity indicates a faulty motor.
4

Check the tachometer on the motor. If the tachometer is easily accessible, test its resistance. The resistance should be within the manufacturer's specifications.
5

Examine the motor for any physical obstructions preventing it from spinning freely.
6

Reconnect power and use a multimeter to check the voltage to the motor when the washer is attempting to spin. You should read approximately 120V AC. If no voltage is present, suspect a faulty MCU.
7

If voltage is present at the motor and the motor doesn't spin, replace the motor. If no voltage is present and wiring is good, replace the MCU.

Safety Warning:

Always disconnect power to the appliance at the breaker panel before performing any repairs. Lock-out/Tag-out (LOTO) procedures should be followed to prevent accidental energization. High voltage is present in the washer's electrical components.

Prevention:

Avoid overloading the washer. Regularly check and clean the drain pump filter to prevent obstructions. Periodically inspect the wiring harness for any signs of wear and tear.

Expert Tip:

Some Admiral washers have a diagnostic mode that can provide more specific information about the error. To enter diagnostic mode, consult the service manual or search online for the specific key combination for your model. The error history can be helpful in identifying intermittent issues.

Frequently Asked Questions

•What is the typical resistance range I should expect from the tachometer?

The typical resistance range for a washer tachometer can vary, but often falls between 50-200 ohms. Refer to the specific service manual for your Admiral washer model for the exact value.

•How do I properly test the motor windings for continuity?

Disconnect the motor from the MCU. Set your multimeter to the ohms setting (resistance). Place the multimeter probes on two of the motor winding terminals. Repeat for all winding combinations. A reading of OL or infinite resistance indicates an open winding and a faulty motor.

•If I replace the MCU, does it need to be programmed or calibrated?

Some newer Admiral washers require the new MCU to be programmed or calibrated to match the specific washer model. Refer to the service manual to determine if programming is required. Without proper programming, the washer may not function correctly.

Admiral Washer Error Code F7E7: Motor Speed Fault Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance range I should expect from the tachometer?

•How do I properly test the motor windings for continuity?

•If I replace the MCU, does it need to be programmed or calibrated?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: