Viking Dishwasher Error Code State Error - User interface

This error means the dishwasher's control panel interface board has entered an invalid or unrecognized operating state that it cannot exit on its own. The user interface board handles all button inputs and display functions, and when its logic becomes corrupted or confused, the machine stops normal operation and displays this error. It can result from power fluctuations, communication issues with the main control board, or a fault within the interface board itself.

Start by performing a full power reset at the circuit breaker, leaving the unit without power for at least one to two minutes before restoring it. If the error returns, inspect the wiring harness connections between the user interface board and the main control board for looseness, corrosion, or damage. Persistent errors after confirmed good connections typically point to a failed user interface board or, less commonly, a failed main control board, either of which would require part replacement.

If the error clears with a reset, there is no parts cost involved, though a service call fee may apply if a technician performs the reset. If the user interface board needs replacement, parts and labor combined typically range from $150 to $400 or more depending on your location and service provider. A failed main control board can bring repair costs higher, so accurate diagnosis before ordering parts is important.

A reset is the recommended first step and often resolves this error when the cause is a transient firmware fault. Turn off the dishwasher at the circuit breaker or unplug it, wait one to two minutes, then restore power and run a test cycle. If the error code returns after resetting, a deeper issue such as a wiring connection problem or a failed board may be present.

When this error is active, the dishwasher will not operate normally, so there is no immediate safety hazard from continuing to attempt use. However, you should not attempt to bypass the error to force a cycle to run, as the control system is in an undefined state. Restore power after a full reset and only run the dishwasher if the error has cleared and the panel responds normally.