Viking Dishwasher F8 Error Code: Blocked Filter

Unlike the usual Viking DFUD fault, F8 arrives only when a cycle is over. The pressure sensor read excessively low pressure in the final rinse, and F8 (L1 with L3 on LED models) is displayed once the program has ended.

Reason for the name

A clogged filter lets less pressure reach the sensor than a clear one does, and the manual takes low pressure as a sign of a filter restricting the flow. Three items are listed:

1. Filter, the screen at the base of the tub
2. Sump, or pressure chamber, the well from which the sensor reads
3. Pressure sensor, converting the reading to a signal

Owner steps from troubleshooting

Of the listed parts, only the filter can be seen with no tools.

• Look at the strainer. A clogged one should be cleaned.
• A little water left in the removable coarse strainer is nothing unusual.
• Nothing should block the spray arms, and they should spin easily.
• Switch the main switch off, then on, to take the code off the display.

Should cleaning change nothing, the sump and sensor need a technician with the right instruments.

Nearby codes

• F9: pressure too low or too high during circulation instead of the final rinse.
• F6: pressure sensor output above 4.8 V.

Viking dishwasher service in Los Angeles

When F8 stays after the filter is clean, call (310) 692-1112 for Viking dishwasher service in Los Angeles and say the filter was cleaned. The dishwasher service page gives an overview.

Source: Viking Range Corporation DFUD dishwasher service manual