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Error code reference

Viking Dishwasher Error Code Flash LED1+LED2

Moisture sensor water detection

Viking codesViking dishwasher codes

Moisture sensor water detection – moisture sensor output is equivalent to water in the base pan.

First step from the service manual

Check for water in base pan from overflow/leak.

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

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What Flash LED1+LED2 means on a Viking dishwasher

The Flash LED1+LED2 error on a Viking dishwasher indicates that the moisture sensor located in the base pan has detected water. This sensor monitors the drip tray at the bottom of the dishwasher cabinet for any accumulation of water that should not be present during normal operation. When the sensor output reaches a threshold equivalent to standing water in the base pan, the control board triggers this dual LED flash pattern to alert the user and halt operation as a protective measure.

The moisture sensor itself is typically a float-type or conductive sensor positioned low in the base pan. When water contacts it, the sensor sends a signal to the control board indicating a leak or overflow condition. The most common root causes include a failed door gasket allowing wash water to escape, a cracked or loose hose connection at the pump, inlet valve, or drain assembly, and a leaking wash pump or motor seal. Overfilling due to a faulty water inlet valve can also result in water spilling into the base pan.

Because this error reflects an actual physical condition rather than an electronic fault, the base pan must be physically inspected and dried before the error will clear. Simply resetting the control board without addressing the water source will result in the error returning as soon as the next cycle runs. Identifying the precise leak origin is critical to a lasting repair.

Source: manufacturer service documentation.

Common causes of Flash LED1+LED2

  1. 01

    Failed or worn door gasket

    Part replacement

    A damaged, cracked, or compressed door gasket allows wash water to escape around the door perimeter and drip into the base pan. Inspect the gasket for tears, deformation, or gaps, especially at the corners.

  2. 02

    Loose or cracked hose connection

    Part replacement

    Hoses connecting the pump, inlet valve, or drain assembly can loosen over time or develop small cracks, causing water to drip into the base pan during operation. Check all hose clamps and hose surfaces for moisture or mineral deposits indicating a slow leak.

  3. 03

    Leaking water inlet valve

    Part replacement

    A faulty inlet valve may allow excess water into the tub, leading to overflow that drains into the base pan. It may also drip externally at its fitting if the seal has deteriorated.

  4. 04

    Pump or motor seal failure

    Part replacement

    The wash pump motor seal can wear out and allow water to escape from the pump housing directly into the base pan. This is often accompanied by a small amount of water visible beneath the pump during inspection.

  5. 05

    Water remaining in base pan after previous incident

    Wiring / connection

    If the base pan was not fully dried after a prior leak or service event, residual water can continue to trigger the moisture sensor even after the original leak source was repaired. Removing and drying the base pan completely will resolve this if no active leak is present.

See the test procedure for each cause

Frequently asked questions about Flash LED1+LED2

What does Flash LED1+LED2 mean on a Viking dishwasher?
The Flash LED1+LED2 error means the moisture sensor in the dishwasher base pan has detected water that should not be there. This is a leak detection alert, not an electronic glitch. The dishwasher stops operating to prevent water damage until the condition is resolved and the base pan is clear of water.
How do I fix the Flash LED1+LED2 error on my Viking dishwasher?
Start by pulling the dishwasher out and inspecting the base pan for standing water. Locate and repair the source of the leak, which could be the door gasket, a hose connection, the inlet valve, or the pump seal. After repairs are made, dry the base pan completely and run a test cycle to confirm the leak has been resolved.
Is it safe to use my Viking dishwasher while the Flash LED1+LED2 error is active?
No, you should not continue running the dishwasher while this error is present. Water in the base pan indicates an active or recent leak, and operating the machine could worsen the leak, cause water damage to cabinetry or flooring, or create an electrical hazard near the motor and control board components.
Will resetting my Viking dishwasher clear the Flash LED1+LED2 error?
A power reset alone will not permanently clear this error because the moisture sensor will detect the water again as soon as the machine attempts to run. The base pan must be physically dried and the leak source must be repaired before the error will stay clear. Address the underlying cause first, then reset the unit.
How much does it cost to repair the Flash LED1+LED2 error on a Viking dishwasher?
Repair costs vary depending on the cause. A door gasket replacement is typically on the lower end, often in the range of $50 to $150 for parts and labor. Pump seal or inlet valve repairs tend to cost more, commonly ranging from $150 to $400 or higher depending on parts pricing and local labor rates. Diagnostic inspection by a technician is advisable to pinpoint the leak before committing to parts.

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