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Error code reference

Viking Dishwasher Error Code Temperature Sensor Disconnect

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

Viking codesViking dishwasher codes

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

First step from the service manual

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

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

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What Temperature Sensor Disconnect means on a Viking dishwasher

The Temperature Sensor Disconnect error on a Viking dishwasher indicates that the control board has detected an open circuit in the water temperature sensor loop. The temperature sensor, typically a negative temperature coefficient (NTC) thermistor, monitors the water temperature throughout the wash and dry cycles. When the circuit is open, the control board receives no valid resistance signal from the sensor, causing it to halt normal operation and display this fault code.

The most common causes of this fault are a physically disconnected wiring harness at the sensor itself or at the control board connector, a broken wire in the sensor circuit, or a failed sensor that has developed an internal open. A functioning thermistor presents a measurable resistance value that changes predictably with water temperature. When the control board reads infinite resistance or no continuity, it interprets this as a disconnected or open sensor circuit.

Diagnosing this code begins with inspecting the temperature sensor connector for loose, corroded, or backed-out terminals. The wiring harness should also be traced for any visible damage such as pinched or chafed insulation. If wiring and connections appear intact, the sensor itself should be tested for continuity and proper resistance across its terminals. A sensor showing no continuity confirms an internal failure requiring replacement.

Source: manufacturer service documentation.

Common causes of Temperature Sensor Disconnect

  1. 01

    Disconnected sensor wiring harness

    Wiring / connection

    The connector at the temperature sensor or at the control board may have come loose due to vibration or handling during previous service. Inspect both ends of the harness for a secure, fully seated connection.

  2. 02

    Failed temperature sensor (open thermistor)

    Part replacement

    The thermistor inside the sensor can fail internally, creating an open circuit. Testing across the sensor terminals with a multimeter will show no continuity if the sensor has failed.

  3. 03

    Broken or damaged sensor wire

    Part replacement

    A wire in the sensor circuit may be broken internally or have damaged insulation causing an open. Trace the harness from the sensor to the control board looking for pinched, chafed, or severed sections.

  4. 04

    Corroded or damaged connector terminals

    Wiring / connection

    Moisture exposure can corrode the pin terminals in the sensor connector, increasing resistance to the point of an effective open circuit. Inspect the connector pins for green or white corrosion deposits and clean or replace as needed.

  5. 05

    Faulty control board

    Part replacement

    If the sensor and all wiring test correctly, the control board's sensor input circuit may have failed. This is the least likely cause and should only be considered after ruling out the sensor and wiring.

See the test procedure for each cause

Frequently asked questions about Temperature Sensor Disconnect

What does Temperature Sensor Disconnect mean on a Viking dishwasher?
This error means the control board is detecting an open or broken circuit in the water temperature sensor loop. The sensor is responsible for reporting water temperature during wash and dry cycles, and without a valid signal, the dishwasher will not operate normally. The fault points to either a disconnected wiring harness, a broken wire, or a failed sensor.
Can I fix a Temperature Sensor Disconnect error myself?
In many cases, yes. Start by checking that the sensor's wiring connector is fully seated at both the sensor and the control board. If connections are secure, use a multimeter to test the sensor for continuity across its terminals. A broken wire or failed sensor can often be replaced by a confident DIYer comfortable working with basic electrical components and wiring.
Will resetting the dishwasher clear this error code?
A reset may temporarily clear the error display, but the fault will return immediately if the underlying open circuit has not been repaired. The control board continuously monitors the sensor circuit, so any disconnection or failed component will trigger the code again as soon as the dishwasher attempts to run a cycle. A proper repair of the wiring or sensor is required to permanently clear this fault.
Is it safe to use my Viking dishwasher while this error is active?
It is not recommended to continue using the dishwasher with this error active. Without a functioning temperature sensor, the control board cannot confirm that water is being heated to the correct temperature, which can result in inadequate cleaning and sanitization. Running the appliance in a faulted state may also cause additional strain on related components.
How much does it cost to repair a Temperature Sensor Disconnect error on a Viking dishwasher?
If only a wiring connection needs to be reseated, there may be no parts cost at all. A replacement temperature sensor typically costs between $20 and $75 depending on the specific part. If a professional repair technician is needed, expect total costs including labor to range from $100 to $250 or more, depending on your location and the extent of the repair required.

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