The inner door of a dishwasher with its panel lifted away, a flat ribbon cable running down beside the hinge toward the base of the machine.

Viking dishwasher
showing 3-1

Viking's UI-MC communication error: the user interface on the door and the motor control are not talking.

(844) 430-4286

Mon–Sat, 8am–8pm

  • Communication
  • Controls and sensors
  • Source: Viking

Book a visit

Three short steps, about a minute.

or call (844) 430-4286

Before you book,
in this order.

Each step comes from Viking's own guidance for 3-1 on its dishwashers. Follow it to the end: the last card says whether this is a visit.

01

Hold Start for 4 seconds to reset.

02

Run a short cycle.

03

If the 3-1 pattern returns, book a visit.

Still there?

It usually turns into controls and sensors. Book with the code and the model number.

What not to do

Do not replace the door controls on a guess. The link between the two boards is checked before either one.

What you may
notice with it.

The dishwasher problem 3-1 tends to arrive with. Answer these at the dishwasher before anyone is booked.

All problems

Where 3-1 usually leads

Controls and sensors.

Control board, keypad or sensor · moderate.

In Viking's own words

UI-MC Comm Error Reset Unit and try again. If problem persists, contact service.
Viking 451 Series built-in dishwashers use & care manual: troubleshooting code table

Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. The 3-1 pattern is in the tables for Viking 451, 324 and later 450 Series built-in dishwashers.

Viking 3-1 dishwasher repair,
where we come out.

The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered.

All service areas
A family unloading clean plates from an open dishwasher together in a bright contemporary kitchen, a child handing a plate to a parent
For the heart of your home.

Questions
about 3-1.

Can I clear 3-1 myself?
Hold Start for 4 seconds to reset. If it comes back, it needs a visit.
Should I replace the door controls on my Viking for 3-1?
Not on a guess, since the connection between the door interface and the motor control is checked before either board. Reset by holding Start for four seconds first.
What does the 3-1 pattern mean on a Viking?
Viking labels it UI-MC, a communication error between the control panel in the door and the board that runs the motor. A short cycle after a reset shows whether it recurs.

Back to your everyday

Still showing 3-1?

Book with the characters exactly as shown, the full model number, and whether any water is on the floor — for a code, that is where the diagnosis begins.

(844) 430-4286 Schedule a repair