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Error code reference

Viking Dishwasher Error Code Moisture Sensor Disconnect

The moisture sensor circuit is open or disconnected from the control board.

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The moisture sensor circuit is open or disconnected from the control board.

First step from the service manual

Check for open moisture sensor; check connection to moisture sensor.

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

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What Moisture Sensor Disconnect means on a Viking dishwasher

The Moisture Sensor Disconnect error on a Viking dishwasher indicates that the control board is detecting an open circuit in the moisture sensor loop. The moisture sensor monitors humidity or condensation levels inside the dishwasher tub, and the control board continuously checks for a valid signal from this component. When the circuit is open, meaning there is no continuity between the sensor and the board, the control board cannot receive sensor data and triggers this fault code.

The most direct cause of this error is a physical disconnection somewhere along the sensor circuit. This includes the connector at the sensor itself becoming loose or unplugged, a wire in the harness that has broken or pulled free from its terminal, or corrosion at a connector that has effectively opened the circuit. The sensor is typically located in the lower portion of the tub or door area where it is exposed to moisture and heat cycles, which over time can degrade connector integrity.

A failed moisture sensor with an internally open element can also produce this code, even if all wiring connections appear intact. Diagnosing this fault requires physically inspecting the sensor connector and wiring harness for loose or damaged connections first, then testing the sensor itself for continuity to determine whether the sensor component has failed internally.

Source: manufacturer service documentation.

Common causes of Moisture Sensor Disconnect

  1. 01

    Disconnected sensor connector

    Wiring / connection

    The wire connector at the moisture sensor may have come loose from vibration or handling during previous service. Inspect the connector at the sensor and reseat it firmly.

  2. 02

    Broken or damaged wiring harness

    Part replacement

    A wire in the harness between the moisture sensor and the control board may have broken internally or pulled free from a terminal. Trace the harness visually and check each wire for continuity.

  3. 03

    Corroded connector terminals

    Wiring / connection

    Repeated exposure to heat and moisture can cause corrosion at the sensor connector, increasing resistance until the circuit reads as open. Inspect terminals for oxidation or green buildup and clean or replace the connector.

  4. 04

    Failed moisture sensor

    Part replacement

    The sensor element itself may have failed internally, resulting in an open circuit even when all wiring connections appear secure. Test the sensor for continuity across its terminals to confirm.

  5. 05

    Control board connection issue

    Wiring / connection

    The harness connector at the control board end of the moisture sensor circuit may be loose or damaged. Check the relevant board terminal for secure seating and visible damage.

See the test procedure for each cause

Frequently asked questions about Moisture Sensor Disconnect

What does Moisture Sensor Disconnect mean on a Viking dishwasher?
This error means the control board is detecting an open circuit in the moisture sensor loop, indicating the sensor is either physically disconnected or has failed internally. The control board cannot receive a valid signal from the sensor. The fault must be resolved before normal operation can resume.
Can I fix the Moisture Sensor Disconnect error myself?
In many cases, yes. Start by checking the wire connector at the moisture sensor and reseating it firmly, then inspect the harness for any visible damage or broken wires. If connections are intact but the error persists, testing the sensor for continuity with a multimeter can confirm whether the sensor itself needs replacement. If the control board connection or the board itself is involved, that repair is better suited to a qualified technician.
Is it safe to use my Viking dishwasher with a Moisture Sensor Disconnect error?
It is generally not recommended to continue running the dishwasher while this fault is active, as the control board is missing sensor input it relies on to manage the cycle properly. Operating with a disconnected sensor circuit could result in incomplete or improper cycle behavior. Resolve the fault before resuming use.
How much does it cost to repair a Moisture Sensor Disconnect error on a Viking dishwasher?
If the fix is simply reseating a loose connector, there is no parts cost and only a service call fee if a technician is involved, typically in the range of $75 to $150. Replacing the moisture sensor itself usually runs $50 to $150 for the part, plus labor. If the wiring harness or control board requires replacement, total repair costs can range from $200 to $500 or more depending on parts and labor rates in your area.
Will resetting my Viking dishwasher clear the Moisture Sensor Disconnect error?
Performing a reset may temporarily clear the error code, but the fault will return as soon as the control board checks the sensor circuit again and detects the open condition. A reset is not a repair. The underlying cause, whether a loose connector, damaged wire, or failed sensor, must be corrected to permanently resolve the error.

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