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Error code reference

Viking Dishwasher Error Code Pan Moisture (both lights flash continuously)

Pan moisture sensor detected water in base pan

Viking codesViking dishwasher codes

Pan moisture sensor detected water in base pan

First step from the service manual

Check the base pan for water. Check for 175k ohms.

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

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  • 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
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What Pan Moisture (both lights flash continuously) means on a Viking dishwasher

The Pan Moisture error on a Viking dishwasher is triggered when the moisture sensor located in the base pan detects the presence of water beneath the tub. This sensor is a leak detection device designed to protect the floor and surrounding cabinetry from water damage. When water accumulates in the base pan, the sensor's resistance drops below the expected threshold. Under dry conditions, the sensor should read approximately 175,000 ohms (175k ohms). When moisture bridges the sensor contacts, resistance drops significantly, and the control board interprets this as a leak event, causing both indicator lights to flash continuously.

The most common root cause is an actual water leak originating from a component inside or beneath the dishwasher tub. Leaks can develop from a failed door gasket, a cracked or loose hose connection, a faulty water inlet valve, or a degraded pump seal. Even a small, slow drip over time can accumulate enough water in the sealed base pan to trigger the sensor. In some cases, condensation or a one-time overflow event can leave residual moisture that sets off the alert without an active ongoing leak.

Diagnosis begins with physically inspecting the base pan for standing water and measuring the sensor resistance to confirm it reads near 175k ohms when dry. If water is present, the source of the leak must be identified and repaired before the error will clear. Simply drying out the pan may temporarily reset the condition, but if an underlying leak exists, the error will return. A thorough inspection of all water-carrying components is essential to a lasting repair.

Source: manufacturer service documentation.

Common causes of Pan Moisture (both lights flash continuously)

  1. 01

    Door gasket leak

    Part replacement

    A worn, cracked, or improperly seated door gasket allows water to escape around the door during a wash cycle and drip into the base pan. Inspect the full perimeter of the door seal for tears, deformation, or debris preventing a proper seal.

  2. 02

    Loose or damaged hose connection

    Wiring / connection

    Hose clamps on the drain hose, inlet hose, or internal circulation hoses can loosen over time, allowing water to drip into the base pan. Check all hose connections for moisture, corrosion, or visible looseness.

  3. 03

    Failed pump seal

    Part replacement

    The wash pump and motor assembly uses seals to contain water during operation. If a pump seal degrades, water can leak past the pump housing and collect in the base pan. Signs include water pooling directly beneath the motor area.

  4. 04

    Faulty water inlet valve

    Part replacement

    A water inlet valve that fails to close fully or develops a crack in its housing can drip water continuously into the tub or directly into the base area. Check the valve body and its connections for moisture or mineral buildup indicating a slow leak.

  5. 05

    Residual moisture triggering the sensor

    Wiring / connection

    A past overflow or splash event may have left moisture in the base pan that has not fully dried, causing the sensor to read low resistance even without an active leak. After confirming the pan is dry and the sensor reads near 175k ohms, monitor the unit through a full cycle to rule out an ongoing leak.

See the test procedure for each cause

Frequently asked questions about Pan Moisture (both lights flash continuously)

What does Pan Moisture (both lights flash continuously) mean on a Viking dishwasher?
This error means the moisture sensor located in the base pan beneath the dishwasher tub has detected water. The sensor is designed to alert you to a potential leak before it causes damage to your floor or cabinetry. Both indicator lights flash continuously as a warning to stop operation and investigate the source of the water. The sensor should read approximately 175k ohms when dry; a significantly lower reading confirms moisture is present.
How do I fix the Pan Moisture error on my Viking dishwasher?
Start by pulling the dishwasher out and inspecting the base pan for standing water. If water is present, dry it thoroughly and then trace the source of the leak by checking the door gasket, hose connections, pump seals, and water inlet valve. Repair or replace the leaking component before running the dishwasher again. Once the pan is dry and the sensor reads near 175k ohms, the error should clear.
Will resetting the dishwasher clear the Pan Moisture error?
A reset may temporarily clear the flashing lights, but the error will return if water is still present in the base pan or if an active leak continues to introduce water. The underlying cause must be identified and resolved for the repair to hold. Always dry the base pan and verify the sensor resistance before assuming the issue is resolved.
Is it safe to run my Viking dishwasher when the Pan Moisture error is showing?
No, you should not run the dishwasher while this error is active. Continuing to operate the appliance with water in the base pan can worsen an existing leak, cause electrical hazards, and lead to damage to your flooring or cabinetry. Stop use until the source of the water is identified and repaired.
How much does it cost to repair a Viking dishwasher Pan Moisture error?
Repair costs vary widely depending on the cause. Replacing a door gasket typically runs in the range of $50 to $150 including parts and labor. A pump seal or water inlet valve replacement can cost between $150 and $400 depending on parts pricing and labor rates in your area. If the leak is simply a loose hose clamp, the fix may cost very little. Having a technician diagnose the specific source before ordering parts helps avoid unnecessary expense.

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