Viking Dishwasher Error Code 5-2

Error code 5-2 on a Viking dishwasher (450 model) signals a blower current sense error, meaning the control board has detected that the blower motor's electrical current is outside the expected range. This code only appears during the service diagnostic cycle, not during normal wash operation. It points to a fault in the blower motor, its wiring, or the current sensing circuit on the main control board.

A reset may temporarily clear the displayed code, but it will not resolve the underlying electrical fault. Because error 5-2 is triggered during the service cycle, it will return the next time diagnostics are run if the root cause has not been corrected. The wiring, blower motor, and control board must be inspected and repaired before the fault is genuinely resolved.

Repair costs depend on the root cause. If the issue is only a loose or damaged wire, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing a blower motor generally adds $100 to $300 in parts costs, while a main control board replacement can range from $150 to $400 or more in parts, plus labor. Getting a diagnostic assessment before authorizing repairs is the best way to understand the total cost.

The first step, checking for disconnected or loose wires between the main control board and the blower motor, is something a confident DIYer can perform safely with the dishwasher unplugged. However, reproducing this fault requires running the service diagnostic cycle, which involves specific button sequences and knowledge of the machine's service mode. Further diagnosis of the blower motor or control board is best handled by a qualified appliance technician.

Error code 5-2 is specific to the service diagnostic cycle and may not prevent normal wash cycles from running. However, if the blower motor is faulty, drying performance will be reduced. It is advisable to have the fault diagnosed promptly to avoid any further damage to related components.