Viking Dishwasher Error Code 5-5

The 5-5 code on a Viking dishwasher indicates an internal board-level failure detected by the main control board or the user interface board. It means the electronic control system has identified a hardware fault it cannot self-correct. The fault may be in the main control board, the UI board, or the wire harness connecting the two. A technician should inspect all three components to determine which is at fault.

It is generally not advisable to continue operating the dishwasher while a 5-5 error is active. A board-level failure means the control system is not functioning reliably, which could result in improper cycle execution, failure to stop water fill, or other unpredictable behavior. Discontinue use until the faulty component has been identified and replaced.

Repair costs depend on which component has failed. A wire harness replacement is the least expensive repair, typically falling in the range of $50 to $150 for parts and labor. Main control board or user interface board replacements are more costly, with parts and labor potentially ranging from $200 to $500 or more depending on part availability and local labor rates. Diagnosing the exact failed component first will help avoid unnecessary parts replacement.

A knowledgeable DIYer can start by inspecting the wire harness between the main control board and the user interface board for loose connectors, corrosion, or broken wires, as these are the least expensive repairs. However, if the harness checks out, the fault likely lies in one of the control boards, and replacing these components requires familiarity with appliance electronics and safe handling of circuit boards. If you are not comfortable working with control board assemblies, a qualified technician is recommended.

A power reset, performed by cutting power to the unit at the breaker for several minutes, may temporarily clear the 5-5 code if the fault was caused by a transient power event. However, if the underlying cause is a defective main control board, UI board, or damaged wire harness, the code will return. A reset alone does not fix a hardware fault and should be treated as a preliminary step, not a solution.