How a Viking dishwasher reports a fault
A Viking dishwasher runs its fill, wash, heat and drain through sensors, a pressure sensor and a control board, but it has no numeric display. Instead it flashes two indicator lights as a two-digit pattern — the Pots/Pans light flashes the first digit and the Normal Wash light flashes the second. Counting the blinks is the start of any Viking dishwasher repair, because each pattern points at a specific part: the drain pump, the fill valve, a level sensor, the motor or the flood float. The patterns below are verified from the 451 Series Use & Care manual.
The blink patterns you will see
1-5 is a drain error — most often a blocked filter, drain hose or pump — and 3-3 a drain-pump fault, the two most common drain signals. 2-2 is a fill timeout (a closed supply or clogged inlet), 2-3 a low-level sensor and 2-4 a high-level condition. 1-1 is a pan-flood-sensor disconnect, 2-1 a pressure-sensor disconnect, 4-1 a temperature-sensor fault and 4-2 a fill-too-fast condition. The motor and comms group covers 1-2, 1-3, 3-4 and 3-5, while 3-1 is a control-to-motor comms fault and 5-5 an internal error.
Pan flood and the leak signal
The most important leak signal is when both lights flash continuously: that is a pan-flood condition — water has reached the base float — so the dishwasher stops and runs its drain pump to protect your floor. The 1-1 pan-flood-sensor disconnect is the related signal. The source is usually a hose fitting, a door seal or over-foaming rather than a catastrophic failure, but it should not be ignored.
What to check, and when to call
For a 1-5 or 3-3, clean the base filter and check the drain hose and air gap; for 2-2, confirm the supply is open and the inlet screen is clear. A drain pattern that returns after cleaning, a continuous both-lights pan flood you cannot trace, a 3-1 comms fault or a 4-1 sensor fault needs an experienced, independent technician with genuine parts. Do not assume newer 3/5/7 Series LCD-panel codes map one-to-one onto this 451-Series table. See the full list on the dishwasher error codes page or the wider error codes library, then book dishwasher repair. Confirm your model on the manufacturer’s site at vikingrange.com.