Viking Built-In Dishwasher Code Internal Error (5-5): control reported its own problem

What Internal Error means

Internal Error is flash pattern 5-5 on Viking Professional VDB450 and FDB451 built-in dishwashers with the second-generation control. The Pots/Pans light flashes five times, then the Normal Wash light flashes five times. The dishwasher's control has found an internal problem of its own, not a water or door issue. The cycle stops, and the pattern may repeat. Cleaning the filter will not change it.

Common causes of Internal Error

Control board reporting its own error
Connection between control boards loose
Control board needing replacement

✓ One safe check you can try

1. Turn off the dishwasher's breaker for two minutes and turn it on again. 2. Hold START for four seconds and run a short cycle. 3. If 5-5 shows again, stop using the dishwasher. An internal control error is not something to work around with more resets.

! Why to stop there

The control board needs to be opened and tested
Replacing it is a bigger repair than a reset
We give a written price first and a 30-day warranty after

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Internal ErrorInternal Error questions

What does Internal Error mean?

The control's own self-check failed. The problem is inside the electronics, not in the water supply, the drain or the door latch, so cleaning and leveling will not help.

Can a reset help?

Possibly once. If 5-5 returns after a breaker reset and a four-second START hold, the control or its connections need attention from a technician. That is the point to stop.

Is the whole dishwasher done?

Not usually. Often only the control board needs replacing. We confirm the problem on site and quote the repair in writing before ordering any part.