Viking Dishwasher Error Code 4-3

Error code 4-3 on a Viking dishwasher means the control board detected that the dispenser current sense reading is out of its expected range during a service cycle test. This points to a problem in the dispenser circuit, which includes the wiring harness and the dispenser actuator itself. The code only appears during a service diagnostic cycle, not during regular operation.

Because error code 4-3 only appears during a service cycle test and not during a standard wash cycle, your dishwasher may still run normal cycles. However, if the dispenser actuator is not functioning correctly, detergent may not be released at the proper time, which will affect wash performance. It is best to have the fault diagnosed and repaired before relying on the machine for normal use.

Repair costs vary depending on what is causing the fault. If only a loose connector needs to be reseated, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing a failed dispenser assembly generally adds $100 to $250 in parts depending on the specific model. If the main control board is at fault, parts alone can run $200 to $400 or more, plus labor.

Start by checking all wire connections between the main control board and the dispenser assembly for loose, backed-out, or corroded terminals. If the connectors are secure and the wiring looks intact, the next step is testing the dispenser actuator for proper current draw. If the actuator has failed, the dispenser assembly will need to be replaced. A technician with a service cycle access procedure can help confirm which component is at fault.

A reset may temporarily clear the code from the display, but the underlying fault in the dispenser circuit will remain. The error code 4-3 is generated during the service diagnostic cycle, so it will return the next time that cycle is run if the root cause has not been corrected. Proper repair of the wiring or the dispenser component is necessary to resolve the fault permanently.