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Error code reference

Viking Dishwasher Error Code 1-2

Motor Control Status Error

Viking codesViking dishwasher codes

Motor Control Status Error - motor control communicates a motor operation failure mode most likely caused by the motor control (Variable Speed Motor).

First step from the service manual

Check wires disconnected between motor control and motor; check defective motor control; check defective motor.

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

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What 1-2 means on a Viking dishwasher

Error code 1-2 on a Viking dishwasher indicates a Motor Control Status Error. This fault occurs when the motor control module detects and communicates a motor operation failure mode. The dishwasher uses a Variable Speed Motor (VSM) system, where the motor control board governs pump and wash motor speed based on cycle demands. When the motor control identifies an internal fault or detects that the motor is not responding correctly to its commands, it triggers this error code and halts operation to prevent further damage.

The most common sources of this fault fall into three categories: wiring failures between the motor control and the motor, a defective motor control board, or a failed wash motor itself. Broken, corroded, or disconnected wiring harness connectors between these two components can disrupt the communication and power signals necessary for proper motor operation. A failed motor control board may send incorrect drive signals or none at all, while a mechanically or electrically failed motor may draw excessive current or fail to respond to control signals. Technicians should approach diagnostics systematically, starting with a thorough inspection of all wiring connections before condemning the motor control or motor.

Source: manufacturer service documentation.

Common causes of 1-2

  1. 01

    Disconnected or damaged wiring between motor control and motor

    Wiring / connection

    Loose connectors, broken wires, or corroded terminals in the harness linking the motor control to the wash motor can interrupt signals and power delivery, triggering this fault. Visually inspect all connectors and check for continuity along the wiring path.

  2. 02

    Defective motor control board

    Part replacement

    The Variable Speed Motor control board may have failed internally, preventing it from properly driving or communicating with the wash motor. Signs include burn marks, failed components on the board, or the motor not receiving correct drive voltage.

  3. 03

    Defective or failed wash motor

    Part replacement

    The wash motor itself may have failed mechanically or electrically, causing it to draw excessive current or fail to respond to control signals. Testing motor winding resistance and checking for mechanical binding can help confirm this failure.

  4. 04

    Poor electrical connections at motor control terminals

    Wiring / connection

    Vibration during normal dishwasher operation can loosen terminals at the motor control board. Check that all connections at the board are fully seated and free of corrosion before replacing any components.

See the test procedure for each cause

Frequently asked questions about 1-2

What does 1-2 mean on a Viking dishwasher?
Error code 1-2 on a Viking dishwasher is a Motor Control Status Error. It means the motor control module has detected a motor operation failure in the Variable Speed Motor system. The dishwasher will stop running and display this code to alert you that the motor or its control circuit requires inspection. Common causes include wiring faults, a failed motor control board, or a defective wash motor.
Can I fix error code 1-2 on my Viking dishwasher myself?
A knowledgeable DIYer can start by inspecting and reseating all wiring connectors between the motor control and the wash motor, since a disconnected wire is the simplest and most common cause. However, if the motor control board or the wash motor itself has failed, replacing these components involves working with line voltage and requires comfort with electrical diagnosis. If you are not experienced with appliance electrical systems, hiring a qualified technician is the safer choice.
Is it safe to use my Viking dishwasher when error code 1-2 is showing?
No, you should not attempt to run the dishwasher while error code 1-2 is active. The motor system has been flagged as non-functional, and continued attempts to operate the unit could cause additional damage to the motor control board or the motor. Leave the dishwasher off and unplugged until the fault has been diagnosed and resolved.
Will resetting my Viking dishwasher clear error code 1-2?
A reset may temporarily clear the code, but if the underlying fault in the motor, motor control, or wiring still exists, the error will return as soon as the dishwasher attempts to run a cycle. Resetting without addressing the root cause is not a repair. The fault must be properly diagnosed and the defective component repaired or replaced to clear the code permanently.
How much does it cost to repair a Viking dishwasher with error code 1-2?
Repair costs depend on which component has failed. If the issue is simply a loose or damaged wire, costs may be limited to a service call fee, typically in the range of $75 to $150. Replacing a motor control board can cost $200 to $500 or more depending on parts and labor. A failed wash motor replacement may run $250 to $600 or higher. Getting a diagnostic visit from a qualified technician will give you a more accurate estimate for your specific situation.

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