Viking Built-In Dishwasher Code Wash Heater Error (4-2): wash heater problem

What Wash Heater Error means

On Viking Professional VDB450 built-in dishwashers, flash pattern 4-2 is a Wash Heater Error. It is listed for the 450 and appears in the service cycle only: the Pots/Pans light blinks four times and the Normal Wash light blinks twice. The control found a problem with the heater that warms the wash water. In a regular wash, dishes may come out cool and poorly cleaned.

Common causes of Wash Heater Error

Wash heater not heating
Heater connection loose or open
Control not switching the heater on

✓ One safe check you can try

1. Turn off the dishwasher's breaker for two minutes, then on. 2. Run a short cycle and feel the inside of the door afterward for warmth. 3. Check that your home water heater is on, since cold supply water makes heating slower. 4. If the 4-2 pattern appears or the dishes are cold, call us.

! Why to stop there

Heater testing needs a meter and access to the tub base
A bad heater and a bad control give the same result
We quote the price before starting and warranty the repair for 30 days

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.

→Same appliance

Other Dishwasher codes

Motor Under Voltage ErrorViking Built-In Dishwasher Code Motor Under Voltage Error (3-5): motor supply too low E:09Viking Dishwasher Code E:09: display board communication problem Pots/Pans + Heavy FlashingViking Designer Dishwasher Code Pots/Pans + Heavy Flashing: blocked drain E:10Viking Dishwasher Code E:10: user interface board communication problem Pressure Sensor Disconnect ErrorViking Built-In Dishwasher Code Pressure Sensor Disconnect (2-1): Huba sensor not detected Fill ErrorViking Built-In Dishwasher Code Fill Error (2-2): fill took too long Pump Flow ErrorViking Built-In Dishwasher Code Pump Flow Error (3-2): wash flow not as expected Fill too Fast ErrorViking Built-In Dishwasher Code Fill too Fast Error (4-5): tub filled quicker than expected

Wash Heater ErrorWash Heater Error questions

Why does 4-2 appear only in the service cycle?

Some checks run only during the diagnostic routine, which a technician starts. If you see it during a normal wash, tell us when you call so we know what to test.

Is it the same as Dry Heater Error?

No. The Wash Heater warms the water used for washing the dishes. The Dry Heater, pattern 5-3, is a separate part that handles the drying phase.

Will the dishwasher still clean?

With cold water, cleaning is weaker, especially on greasy pans and baked-on food. We would have the heater checked soon rather than rewashing loads by hand.