GE Washer Error Code D4

The D4 code on a GE washer indicates an IMC Communication Fault. It means the inverter motor control board did not receive a valid communication signal from the user interface board for 10 consecutive seconds. The washer stops operating to prevent uncontrolled motor behavior until the communication link is restored.

Start by unplugging the washer for 30 seconds to reset both control boards. After restoring power, if the code returns, inspect the wiring harness between the IMC and UI boards for loose connectors, corroded terminals, or damaged wires. If the harness is intact, further diagnosis will determine whether the IMC board or the UI board needs replacement.

Repair costs vary depending on what component has failed. If only the wiring harness needs repair or a connector needs reseating, costs are minimal and may only involve a service call fee in the range of $75 to $150. Replacing the IMC board or UI control board typically brings total repair costs into the range of $200 to $450 or more, depending on parts pricing and labor rates in your area.

Unplugging the washer for 30 seconds can clear the D4 code if the fault was caused by a temporary software glitch or a voltage transient. However, if the code returns after the reset, there is an underlying hardware issue with the wiring or one of the control boards that needs to be diagnosed and repaired.

No, it is not advisable to run the washer while the D4 fault is active. The error indicates the motor control system is not receiving proper commands, which means the drive motor cannot be controlled reliably. Running the machine in this condition could cause unpredictable operation or additional damage to the control boards or motor.