mypros+
Error code reference

Viking Dishwasher Error Code LED1+LED2 flash continuously

Moisture Sensor

Viking codesViking dishwasher codes

Moisture Sensor - water detection: moisture sensor output is equivalent to water in the pan.

First step from the service manual

Check for water in base pan from overflow/leak; check for defective moisture sensor.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for LED1+LED2 flash continuously.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What LED1+LED2 flash continuously means on a Viking dishwasher

The LED1+LED2 continuous flash code on a Viking dishwasher indicates that the moisture sensor located in the base pan has detected the presence of water. This sensor is designed to monitor the drip tray area beneath the dishwasher tub and trigger a protective alert when moisture accumulates there. When both LEDs flash simultaneously without stopping, the control board is interpreting the sensor output as equivalent to an active water-in-pan condition, halting normal operation to prevent further water damage.

The moisture sensor works by measuring electrical conductivity or resistance between two probes mounted in the base pan. When water bridges those probes, the output signal changes and the control board registers a fault. This means the code can be triggered by two distinct situations: actual water accumulation from a leak or overflow, or a defective sensor that is sending a false positive signal even when the pan is dry.

Diagnosis begins with a physical inspection of the base pan. The dishwasher should be pulled forward carefully so the underside is accessible. If standing water is present, the source must be identified and repaired before the unit can return to normal operation. Common leak points include the door gasket, pump housing, hose connections, and the wash arm assembly. If the pan is completely dry and the code persists, the moisture sensor itself is the likely culprit and should be tested for proper resistance output or replaced.

Source: manufacturer service documentation.

Common causes of LED1+LED2 flash continuously

  1. 01

    Active water leak into the base pan

    Part replacement

    A leak from the door gasket, pump, hose connections, or wash arm assembly can allow water to drip into the base pan and trigger the sensor. Inspect the pan directly for standing water to confirm this cause.

  2. 02

    Overflow from a blocked drain

    Wiring / connection

    If the drain path is restricted, water can back up and overflow into the base pan area. Check the drain hose, drain filter, and air gap for blockages.

  3. 03

    Defective moisture sensor

    Part replacement

    A faulty sensor can output a water-detected signal even when the base pan is completely dry. If the pan is dry and the code persists, the sensor is likely sending a false positive and needs to be tested or replaced.

  4. 04

    Residual moisture from a previous leak

    Wiring / connection

    Even after a leak is repaired and the source of water is gone, residual moisture remaining on or near the sensor probes can continue triggering the fault. The base pan and sensor area must be fully dried before the code will clear.

See the test procedure for each cause

Frequently asked questions about LED1+LED2 flash continuously

What does LED1+LED2 flash continuously mean on a Viking dishwasher?
This code means the moisture sensor in the base pan beneath the dishwasher tub has detected water or is outputting a signal equivalent to water detection. The dishwasher stops operating as a protective measure. The cause is either an actual water leak into the base pan or a defective moisture sensor producing a false reading.
How do I fix the LED1+LED2 continuous flash error on my Viking dishwasher?
Start by pulling the dishwasher forward and inspecting the base pan for standing water. If water is present, find and repair the leak source, then dry the pan completely. If the pan is dry and the code still appears, the moisture sensor itself should be tested and replaced if it is faulty. A qualified technician should handle internal component access and sensor replacement.
Is it safe to keep using my Viking dishwasher when LED1 and LED2 are flashing?
No, you should not continue operating the dishwasher while this code is active. The alert indicates potential water accumulation beneath the unit, which can cause damage to flooring, cabinetry, and the dishwasher itself. Running the appliance with an active leak could make the underlying problem significantly worse.
Will resetting my Viking dishwasher clear the LED1+LED2 flash code?
A reset will not permanently clear this code if the underlying condition still exists. If water remains in the base pan or the moisture sensor is still detecting moisture, the code will return immediately or as soon as the machine attempts to run. The root cause, whether a leak or a defective sensor, must be resolved first.
How much does it cost to repair a Viking dishwasher with the LED1+LED2 moisture sensor error?
Repair costs depend on the cause. If the issue is a clogged drain or residual moisture with no parts needed, you may only pay a service call fee, typically in the range of $75 to $150. Leak repairs involving gaskets or hose replacements can run $150 to $350 depending on the component. Moisture sensor replacement, including parts and labor, generally falls in the $100 to $250 range.

Related Viking dishwasher codes

All Viking dishwasher codes
View all 101 Viking dishwasher codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass