Hisense Range Error Code Err 003

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.

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.

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.

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.

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.