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Error code reference

Haier Washer Error Code Err10

Lost communication between the power board and the display board.

Haier codesHaier washer codes

Lost communication between the power board and the display board.

First step from the service manual

Cut off power and check connectors between the display board and the power board.

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

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What Err10 means on a Haier washer

Err10 on a Haier washer indicates a lost communication fault between the power board and the display board. These two boards exchange data continuously during operation through a serial communication line, typically using a dedicated wiring harness with multi-pin connectors. When this signal is interrupted or falls outside expected parameters, the control system logs Err10 and halts operation to prevent unsafe or unpredictable behavior.

The most common physical cause is a loose, corroded, or damaged connector at either end of the harness linking the two boards. Vibration from normal wash cycles can gradually work connectors loose over time, and moisture inside the cabinet can cause pin corrosion that increases resistance and disrupts the data signal. A broken or pinched wire within the harness itself can also sever communication even when the connectors appear seated correctly.

If inspecting and reseating the connectors does not resolve the fault, one of the two boards may have failed internally. A damaged communication circuit on either the power board or the display board will produce the same Err10 code regardless of harness condition. In those cases, the faulty board must be identified through process of elimination and replaced. Because the error implicates both boards equally, checking the wiring harness first is essential before committing to a board replacement.

Source: manufacturer service documentation.

Common causes of Err10

  1. 01

    Loose or unseated connector

    Wiring / connection

    The wiring harness connectors between the power board and display board can vibrate loose over time. Cutting power and firmly reseating both ends of the connector is the recommended first step.

  2. 02

    Corroded connector pins

    Wiring / connection

    Moisture inside the washer cabinet can cause oxidation on the harness connector pins, increasing resistance and disrupting the communication signal. Inspect pins for discoloration, pitting, or white residue.

  3. 03

    Damaged or broken wiring harness

    Part replacement

    A pinched, frayed, or broken wire within the harness between the two boards will cut communication even if connectors appear intact. Trace the full length of the harness for visible damage.

  4. 04

    Failed display board

    Part replacement

    An internal failure of the display board's communication circuit will produce Err10 even when the harness and connectors are in good condition. This is identified after ruling out wiring issues.

  5. 05

    Failed power board

    Part replacement

    The power board can lose its ability to send or receive communication signals due to component failure on the board itself. Like display board failure, this is confirmed only after the harness has been inspected and cleared.

See the test procedure for each cause

Frequently asked questions about Err10

What does Err10 mean on a Haier washer?
Err10 signals that communication between the power board and the display board has been lost. These two boards must exchange data continuously for the washer to operate, and when that signal is interrupted the machine stops and displays this code. The fault can stem from a loose connector, damaged wiring, or a failed board.
How do I fix Err10 on a Haier washer?
Start by cutting power to the machine and locating the wiring harness that runs between the power board and the display board. Disconnect and firmly reseat the connectors at both ends, then restore power to see if the error clears. If the error returns, inspect the harness for damaged wires. If the wiring is intact, one of the two boards likely needs to be replaced.
Will resetting my Haier washer clear the Err10 code?
A power reset may temporarily clear the code if the communication dropout was caused by a minor voltage fluctuation, but the error will return quickly if an underlying wiring or board problem exists. Resetting is worth attempting, but a recurring Err10 requires physical inspection of the connectors and harness to find the root cause.
Is it safe to use my Haier washer when Err10 is showing?
No. The washer disables itself when Err10 is active because reliable communication between the boards is required to control all wash functions safely. Attempting to force the machine to run in this state is not recommended. The fault should be diagnosed and corrected before resuming use.
How much does it cost to repair a Haier washer showing Err10?
If the fix is simply reseating a loose connector, there is no parts cost and only the cost of a service call if a technician is involved. A replacement wiring harness is generally an inexpensive part, typically in the range of $10 to $40. Replacing a display board or power board is more costly, with parts and labor often ranging from $150 to $350 depending on the specific model and labor rates in your area.

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