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Error code reference

Viking Range Error Code LED on continuously

Control fault on the DSI module.

Viking codesViking range codes

Control fault on the DSI module.

First step from the service manual

Cycle power and retry. If fault remains, replace DSI.

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

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What LED on continuously means on a Viking range

The continuously illuminated LED on a Viking range indicates a control fault within the DSI (Direct Spark Ignition) module. The DSI module is the electronic brain of the ignition system, responsible for generating the high-voltage spark signal, monitoring flame sensing feedback, and controlling the gas valve output. When the module detects an internal fault condition it cannot recover from, it signals this by holding the LED in a constant ON state rather than the normal blinking or off state seen during standby or ignition cycles.

This fault condition is distinct from a failed ignition attempt. A control fault means the DSI module itself has encountered an error in its internal logic or circuitry, not simply that it failed to light the burner. Common root causes include internal component failure within the module due to age or electrical stress, voltage irregularities from the power supply corrupting the module's operating state, or a wiring harness fault sending unexpected signals back into the control board.

The first corrective step is a power cycle, which clears the module's volatile memory and allows it to reinitialize. If the LED returns to a continuous ON state after power is restored, the DSI module has a persistent internal fault and requires physical replacement. Continuing to operate the range with a faulted DSI module is not recommended, as the module controls gas valve activation and ignition timing.

Source: manufacturer service documentation.

Common causes of LED on continuously

  1. 01

    DSI module internal failure

    Part replacement

    The DSI module's internal circuitry has failed due to age, heat exposure, or electrical stress. This is the most common cause when the LED remains on continuously after a power cycle.

  2. 02

    Voltage spike or power irregularity

    Wiring / connection

    A surge or fluctuation in incoming power can corrupt the DSI module's operating state, triggering a latched fault. A power cycle may clear this if the module hardware is otherwise intact.

  3. 03

    Wiring harness fault

    Wiring / connection

    A short, open circuit, or loose connector in the wiring between the DSI module and connected components can feed unexpected signals into the module, causing it to register a control fault.

  4. 04

    Moisture or contamination on the module

    Wiring / connection

    Spills or condensation reaching the DSI module can cause intermittent shorts on the board. Inspect the module for visible residue or corrosion on the connector pins.

See the test procedure for each cause

Frequently asked questions about LED on continuously

What does LED on continuously mean on a Viking range?
A continuously lit LED on a Viking range indicates a control fault within the DSI (Direct Spark Ignition) module. The DSI module manages spark generation, flame sensing, and gas valve control. This fault means the module has detected an internal error rather than a simple ignition failure. The range should not be operated until the fault is resolved.
Will resetting the power clear the LED on continuously fault on my Viking range?
A power cycle is the recommended first step and will clear the fault if it was caused by a temporary voltage irregularity or a momentary software glitch in the DSI module. Turn off the range, disconnect it from power for at least 60 seconds, then restore power and check the LED. If the LED comes back on continuously, the module has a persistent hardware fault and will need to be replaced.
Is it safe to use my Viking range when the LED is on continuously?
It is not recommended to operate the range while this fault is active. The DSI module controls both the ignition spark and the gas valve, so a faulted module may not properly regulate gas flow or ignition timing. To avoid any risk of uncontrolled gas release or ignition failure, the fault should be diagnosed and resolved before resuming normal use.
How do I fix the LED on continuously error on a Viking range?
Start by cycling power to the range for at least 60 seconds to allow the DSI module to reinitialize. If the LED returns to a continuous ON state after power is restored, the DSI module itself needs to be replaced. Inspect the wiring harness connected to the module for loose connectors, shorts, or visible damage before installing a new module, as wiring faults can cause the same symptom.
How much does it cost to fix the LED on continuously fault on a Viking range?
If the fault requires DSI module replacement, parts alone typically range from around $80 to $250 or more depending on the specific Viking model. Professional labor to diagnose and replace the module generally adds $100 to $200 to the total cost. If the fault clears with a power cycle or is traced to a wiring issue, the repair cost may be minimal.

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