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Error code reference

Midea Washer Error Code E64

Signal between main PCB and inverter PCB is abnormal; unit will stop operation.

Midea codesMidea washer codes

Signal between main PCB and inverter PCB is abnormal; unit will stop operation.

First step from the service manual

Check wiring between main PCB and inverter PCB.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Wiring diagram references and connector pinouts from the OEM service manual
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What E64 means on a Midea washer

Error code E64 on a Midea washer indicates an abnormal communication signal between the main PCB (printed circuit board) and the inverter PCB. These two boards work in tandem to control motor speed and torque: the main PCB sends operational commands to the inverter PCB, which then regulates power delivery to the brushless DC drive motor. When the signal between these boards is interrupted, corrupted, or absent, the washer's control system detects the fault and halts operation entirely to prevent damage to the motor or drive components.

The most frequent root cause of E64 is a wiring problem in the communication harness that runs between the two boards. Connectors can work loose over time due to vibration from normal wash cycles, and individual wires within the harness can develop breaks or short circuits. Corrosion at connector terminals, particularly in humid laundry environments, can also degrade signal quality enough to trigger the fault. Before assuming either board has failed, a thorough inspection of the wiring and connector seating is essential.

If the wiring harness and connectors check out as intact and secure, the fault may lie within the inverter PCB itself or, less commonly, the main PCB. A failed inverter board will be unable to receive or process signals correctly, causing a persistent E64 condition. Because the unit stops operation when this code is active, no wash cycle can be completed until the communication path between the two boards is restored.

Source: manufacturer service documentation.

Common causes of E64

  1. 01

    Loose or disconnected wiring harness

    Wiring / connection

    The communication harness connecting the main PCB and inverter PCB may have worked loose due to vibration over time. Check both ends of the harness for secure seating in their respective connectors.

  2. 02

    Damaged or broken wiring

    Part replacement

    Individual wires within the communication harness can develop breaks, pinches, or short circuits. Visually inspect the full length of the harness for any signs of fraying, cuts, or burn marks.

  3. 03

    Corroded connector terminals

    Wiring / connection

    Moisture in the laundry environment can cause oxidation on the connector pins at either board, increasing resistance and disrupting the signal. Inspect terminals for discoloration or white or green residue and clean or replace as needed.

  4. 04

    Failed inverter PCB

    Part replacement

    If the wiring and connectors are intact, the inverter PCB itself may have failed and can no longer process the communication signal. This typically requires board replacement.

  5. 05

    Failed main PCB

    Part replacement

    Less commonly, the main PCB may be unable to generate or transmit the control signal to the inverter board. This is usually diagnosed after ruling out wiring issues and inverter PCB failure.

See the test procedure for each cause

Frequently asked questions about E64

What does E64 mean on a Midea washer?
E64 indicates that the communication signal between the main PCB and the inverter PCB is abnormal. The inverter PCB controls power delivery to the drive motor, and both boards must communicate reliably for the washer to operate. When this signal is disrupted or lost, the washer stops all operation and displays E64 to alert the user. The fault can stem from loose wiring, a damaged harness, corroded connectors, or a failed board.
Can I fix E64 on my Midea washer myself?
In some cases, yes. Start by unplugging the washer and inspecting the wiring harness and connectors between the main PCB and inverter PCB. If a connector is loose, reseating it firmly may resolve the error. If wiring is damaged or a board has failed, those repairs involve working inside the machine and may be better handled by a qualified technician.
Is it safe to keep using my Midea washer with an E64 error?
No. The washer automatically stops operation when E64 is detected, so it will not allow a cycle to run. Attempting to force operation with a known communication fault between control boards could risk further damage to the motor or electronics. The fault should be diagnosed and resolved before returning the unit to regular use.
Will resetting my Midea washer clear the E64 error?
A reset, such as unplugging the washer for a few minutes and restarting it, may temporarily clear the error if the fault was caused by a transient signal glitch. However, if the underlying cause is a loose connector, damaged wire, or failed component, the E64 code will return once the washer attempts to operate again. A reset alone is not a fix.
How much does it cost to repair an E64 error on a Midea washer?
Repair costs vary depending on the cause. If the issue is simply a loose connector, there may be no parts cost at all, though a service call from a technician could run anywhere from $75 to $150 or more. If the inverter PCB needs replacement, parts and labor combined could range from $150 to $350 or higher depending on your location and the specific model. Main PCB replacement tends to fall in a similar price range.

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