Viking Built-In Dishwasher Code Motor Under Voltage Error (3-5): motor supply too low

What Motor Under Voltage Error means

Flash pattern 3-5 on Viking Professional VDB450 and Designer DDB325 built-in dishwashers is Motor Under Voltage, shown as three blinks of the Pots/Pans light and five of the Normal Wash light. The motor circuit is seeing less voltage than it needs to run. The control stops the cycle instead of driving a motor on weak power, which leaves the load only partly washed.

Common causes of Motor Under Voltage Error

Low supply voltage reaching the motor circuit
Loose power connection to the dishwasher
Motor control or power-supply board delivering too little

✓ One safe check you can try

1. See whether other appliances or lights on the same circuit act weak or flicker. 2. Switch the dishwasher's breaker off for two minutes and on again, and make sure it is fully seated. 3. Run a short cycle. 4. If 3-5 comes back, stop using the dishwasher. Power supply checks need a meter, so we do them on site.

! Why to stop there

Low voltage can come from the house circuit, the connection or the dishwasher
A meter is the only way to separate those
Written price before work, 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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Motor Under Voltage ErrorMotor Under Voltage Error questions

Could my house wiring be the cause?

It can be, which is why we measure the supply during the visit. If lights dim when the dishwasher starts, mention that when you call.

Does a breaker reset help?

It restarts the control and re-seats the breaker contacts, which fixes a marginal connection once in a while. A returning 3-5 needs a real measurement.

Is it harmful to run it again?

A motor on low voltage can overheat, which is why the control stops the cycle. We recommend waiting for the check, and we can measure the supply and the dishwasher's draw during the same visit.