F6 on a Viking DFUD: the pressure sensor signal is too high. The cycle runs on; the code is hidden in service mode.
Model compatibility: Viking reuses codes across series and model years, so F6 / L6 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
F6 is a pressure sensor fault with the output signal above 4.8 V; the program continues and the fault shows only in the service menu.
Several faults on Viking DFUD dishwashers concern the pressure sensor, which measures the water level in the sump. F6 (L6 on LED models) is a different kind: the complaint is not the water but the electrical output of the sensor itself, now above 4.8 V.
During the cycle
The program keeps running. Per the manual this fault shows in the service menu alone, so an ordinary user sees nothing on the panel. The same sensor supports level decisions in other places, which the filter and circulation faults demonstrate.
What to check, per the manual
Pressure sensor, whose job is gauging the level via the pressure chamber
Control unit, the part that takes in and interprets the signal
Wiring, linking sensor and control
For owners
No reset is given and no owner inspection is listed. A signal voltage is read with a meter on a machine that is live and opened up, so this is not something to try at home.
Other pressure sensor codes
F8 covers excessively low pressure at the last rinse, flagged once the program is over.
2-1 is a sensor reading out of range in the newer series.
Viking dishwasher service in Los Angeles
For Viking dishwasher service in Los Angeles, call (310) 692-1112. Quote F6, say whether a technician or the display gave it to you, and have the model number from the rating plate. The dishwasher service page describes the work.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Viking appliance?
Book a specialist visit for a clear estimate and approval before any repair.
