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Error code reference

Viking Dishwasher Error Code Both flash

Pan moisture detected

Viking codesViking dishwasher codes

Pan moisture detected — water in the 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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What Both flash means on a Viking dishwasher

The "Both flash" error on a Viking dishwasher indicates that moisture or standing water has been detected in the base pan, which sits beneath the wash tub assembly. This condition is monitored by a float switch or moisture sensor positioned in the drip pan at the bottom of the unit. When water accumulates in this pan, the sensor triggers the error and halts machine operation to prevent further water damage or electrical hazards. The critical resistance value associated with this sensor circuit is 175K ohms, which represents the expected reading under dry, normal conditions.

Water collects in the base pan as a result of internal leaks originating from various components including the door gasket, pump assembly, hose connections, or the wash tub itself. Even a slow drip over time can accumulate enough water in the sealed base cavity to trigger the sensor. Technicians should begin by removing the lower access panel to visually inspect the base pan for any standing water before proceeding to sensor resistance testing.

Once water is found in the base pan, the leak source must be identified and corrected before the appliance can return to normal operation. After the base pan is dried and any leak is repaired, the sensor resistance should be checked with a multimeter. A reading near 175K ohms confirms the sensor is dry and functioning correctly. A reading significantly below this value suggests residual moisture or a faulty sensor that may need replacement.

Source: manufacturer service documentation.

Common causes of Both flash

  1. 01

    Door gasket leak

    Part replacement

    A worn, cracked, or displaced door gasket allows water to escape around the door during a wash cycle, dripping down into the base pan. Inspect the gasket for visible damage, deformation, or gaps where it seats against the tub.

  2. 02

    Pump or pump seal failure

    Part replacement

    The wash pump or drain pump seals can degrade over time, allowing water to leak from the pump housing into the base pan. Look for water trails or mineral deposits around the pump assembly as evidence of leakage.

  3. 03

    Loose or cracked hose connections

    Wiring / connection

    Internal hose connections linking the pump, spray arms, and drain can loosen or crack, producing drips that accumulate in the base pan. Check all hose clamps and fittings for tightness and signs of cracking or wear.

  4. 04

    Tub or sump area crack

    Part replacement

    Physical damage to the wash tub or sump can create a slow leak that routes water into the base pan. Inspect the tub interior and sump for hairline cracks, particularly around the lower corners and mounting points.

  5. 05

    Moisture sensor fault

    Part replacement

    If no visible water or leak source is found but the error persists, the moisture sensor itself may have failed or drifted out of its correct 175K ohm resistance range. Test the sensor with a multimeter and replace it if the reading does not match the specified value.

See the test procedure for each cause

Frequently asked questions about Both flash

What does Both flash mean on a Viking dishwasher?
The Both flash error means the dishwasher has detected water in the base pan located underneath the appliance. A moisture sensor in the base pan monitors for water accumulation and shuts the machine down when it detects a problem. This is a protective function designed to prevent floor damage and electrical hazards. The sensor circuit should measure approximately 175K ohms when the pan is dry and the system is functioning correctly.
How do I fix the Both flash error on my Viking dishwasher?
Start by removing the lower access panel and checking the base pan for standing water. If water is present, dry it out completely and then trace the source of the leak, checking the door gasket, pump seals, and hose connections. After repairing the leak and drying the pan, test the moisture sensor with a multimeter to confirm it reads near 175K ohms before running the machine again.
Is it safe to run my Viking dishwasher when the Both flash error is showing?
No, you should not continue running the dishwasher while this error is active. Water in the base pan can come into contact with electrical components, creating a shock or fire hazard. The appliance should remain off until the leak is identified, the base pan is dried, and the fault is resolved.
Will resetting my Viking dishwasher clear the Both flash error?
A reset alone will not permanently clear this error if water remains in the base pan or an active leak is still present. The moisture sensor will continue to detect the condition and re-trigger the fault. The underlying cause must be repaired and the base pan fully dried before the error will clear reliably.
How much does it cost to repair the Both flash error on a Viking dishwasher?
Repair costs vary depending on the root cause of the leak. A door gasket replacement is typically the least expensive fix, generally falling in the range of $50 to $150 for parts and labor. Pump seal or pump assembly repairs can range from $150 to $400 or more depending on parts and labor rates in your area. Diagnosing the exact leak source before ordering parts will help avoid unnecessary expenses.

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