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Error code reference

Hisense Range Error Code Err 003

Communication failure between user interface and power board due to damaged connecting cable between PB and…

Hisense codesHisense range codes

Communication failure between user interface and power board due to damaged connecting cable between PB and UI, or damaged PB or UI.

First step from the service manual

Check the 4th wire between PB (Connector K23) and UI (Connector K1).

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

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What Err 003 means on a Hisense range

Err 003 on a Hisense range indicates a communication failure between the user interface (UI) board and the power board (PB). These two control boards must exchange data continuously to coordinate user inputs with the range's heating and safety functions. When the signal between them is interrupted or corrupted, the range detects the breakdown and displays Err 003 to prevent unsafe or erratic operation.

The communication between the PB and UI travels through a multi-wire harness. Specifically, the 4th wire in the cable connecting PB Connector K23 to UI Connector K1 is the primary focus of initial diagnosis. This wire carries a critical signal line, and any damage to it, such as a break, pinch, burn, or loose terminal, will disrupt communication and trigger the error. The cable as a whole should be inspected for visible damage, improper routing, heat exposure, or connectors that have worked loose over time.

If the connecting cable checks out and the wiring shows no faults, the fault likely resides in one of the two boards themselves. Either the power board or the user interface board may have a failed communication circuit, damaged connector pins, or internal component failure. Determining which board is at fault typically requires testing continuity through the harness, inspecting connector terminals for corrosion or bent pins, and if necessary, substituting boards one at a time to isolate the defective component.

Source: manufacturer service documentation.

Common causes of Err 003

  1. 01

    Damaged or broken connecting cable

    Part replacement

    The wire harness between PB Connector K23 and UI Connector K1 is the most likely culprit. Inspect the full length of the cable for cuts, pinches, burn marks, or sections that have been chafed against a sharp edge.

  2. 02

    Loose or disconnected connector

    Wiring / connection

    Either the K23 connector on the power board or the K1 connector on the user interface board may have vibrated loose or was not fully seated. Check both connectors and press them firmly into place to restore contact.

  3. 03

    Faulty 4th wire signal line

    Part replacement

    The 4th wire specifically within the connecting harness is the first point of focus during diagnosis. This individual wire may have an open circuit or intermittent break even if the rest of the cable appears undamaged. Test continuity on this wire directly.

  4. 04

    Failed power board (PB)

    Part replacement

    If the cable and connectors are intact, the power board itself may have a damaged communication circuit or corroded connector pins at K23. A failed power board will require replacement to resolve the error.

  5. 05

    Failed user interface board (UI)

    Part replacement

    The user interface board can also develop internal faults that prevent it from communicating with the power board. If the PB and cable test correctly, the UI board should be suspected and replaced.

See the test procedure for each cause

Frequently asked questions about Err 003

What does Err 003 mean on a Hisense range?
Err 003 indicates a communication failure between the user interface board and the power board. The range detected that these two boards can no longer exchange the signals needed for normal operation. The fault is typically caused by a damaged wire in the connecting harness, a loose connector, or a failed board. The range will not function normally until the issue is resolved.
Can I fix Err 003 on my Hisense range myself?
A knowledgeable DIYer can start by inspecting the cable connecting the two control boards and reseating both connectors, which requires no parts and may clear the error. If the cable is visibly damaged or the error persists after checking connections, replacing the harness or a control board is more involved and may be better suited to a technician. Always disconnect power to the range before inspecting any internal wiring.
Is it safe to use my Hisense range while Err 003 is displayed?
It is not recommended to continue using the range while Err 003 is active. A communication failure between the power board and user interface board means the range cannot reliably process control inputs or monitor its own operation. This creates a risk of unexpected or uncontrolled behavior. Discontinue use and diagnose the fault before operating the appliance again.
Will resetting my Hisense range clear the Err 003 code?
A power reset may temporarily clear the display, but Err 003 will return if the underlying hardware fault is still present. If the error comes back after cutting power and restoring it, a physical problem with the cable or one of the control boards needs to be addressed. A reset alone is not a fix for this error code.
How much does it cost to repair Err 003 on a Hisense range?
Repair costs vary depending on which component is at fault. If only the connecting harness needs replacement, parts costs are typically modest, generally in the range of $15 to $50. Replacing a control board such as the power board or user interface board will cost more, with parts often ranging from $80 to $250 or higher, plus labor if a technician performs the repair. Getting a diagnosis before purchasing parts can help avoid unnecessary expenses.

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