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Error code reference

Viking Cooktop Error Code 6 Flashes

Coil temperature sensor malfunction.

Viking codesViking cooktop codes

Coil temperature sensor malfunction.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
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What 6 Flashes means on a Viking cooktop

The 6 Flashes error code on a Viking induction or electric cooktop indicates a coil temperature sensor malfunction. The coil temperature sensor monitors the heat generated by the induction coil or heating element and relays that data to the control board. When the control board detects that the sensor's signal is outside the expected range, either because the resistance reading is too high, too low, or completely absent, it halts operation and triggers the 6 Flashes fault code to protect the unit from overheating or damage.

Temperature sensors used in Viking cooktops are typically NTC (negative temperature coefficient) thermistors, which change resistance predictably as temperature rises or falls. A functioning sensor will produce a resistance reading within a specific range at room temperature. If the thermistor has failed open or shorted, or if the wiring harness connecting it to the control board has become damaged, corroded, or disconnected, the board cannot accurately monitor coil temperature and will shut down as a safety precaution.

Common root causes include physical damage to the sensor from excessive heat exposure, a broken or pinched wire in the sensor harness, a loose connector at the board or sensor terminals, or outright thermistor failure due to age and cycling stress. In some cases, the control board itself may be misreading a valid sensor signal due to a board-level fault, though this is less common. Proper diagnosis requires measuring sensor resistance and inspecting the wiring harness before replacing any components.

Source: manufacturer service documentation.

Common causes of 6 Flashes

  1. 01

    Failed coil temperature sensor (thermistor)

    Part replacement

    The thermistor itself may have burned out or drifted out of its correct resistance range due to heat stress or age. Measuring the sensor's resistance with a multimeter and comparing it to the expected value at room temperature will confirm this failure.

  2. 02

    Damaged or disconnected sensor wiring harness

    Part replacement

    The wiring between the temperature sensor and the control board can become pinched, burned, or corroded over time, interrupting the signal. Visually inspect the harness for melted insulation, breaks, or loose connector pins.

  3. 03

    Loose connector at the control board or sensor terminal

    Wiring / connection

    Vibration and thermal cycling can cause connector pins to back out of their housings, creating an intermittent or absent signal. Check that all harness connectors are fully seated at both the sensor end and the board end.

  4. 04

    Heat damage to the sensor from prolonged high-temperature operation

    Part replacement

    If the cooktop has been run at maximum heat for extended periods, the sensor mounted near the coil can be physically damaged by radiant heat. Look for discoloration or deformation of the sensor body and its surrounding components.

  5. 05

    Control board fault

    Part replacement

    In less common cases, the control board may be unable to correctly interpret an otherwise functional sensor signal due to a component failure on the board itself. This is typically diagnosed after the sensor and wiring have been confirmed good.

See the test procedure for each cause

Frequently asked questions about 6 Flashes

What does 6 Flashes mean on a Viking cooktop?
The 6 Flashes code indicates a coil temperature sensor malfunction. The cooktop's control board monitors the sensor's signal to track coil temperature, and when that signal falls outside the expected range, the unit shuts down and displays this fault. The issue can stem from a failed thermistor, damaged wiring, or a loose connector.
Can I fix the 6 Flashes error on my Viking cooktop myself?
A knowledgeable DIYer can inspect the sensor wiring harness for visible damage and reseat loose connectors without special tools. However, confirming a failed thermistor requires a multimeter to check resistance values, and replacing internal components on an induction cooktop involves working near high-voltage capacitors that can retain charge even when unplugged. If you are not comfortable with electrical diagnostics, a qualified appliance technician should handle the repair.
Is it safe to use my Viking cooktop while it shows the 6 Flashes error?
No, you should not attempt to operate the cooktop while this fault is active. The 6 Flashes code means the control board cannot reliably monitor coil temperature, which removes a key safety protection against overheating. The unit should remain off until the sensor malfunction is diagnosed and corrected.
Will resetting the cooktop clear the 6 Flashes error?
Unplugging the cooktop or cutting power at the breaker for several minutes may temporarily clear the fault code, but it will return if the underlying sensor problem has not been fixed. A reset does not repair a failed thermistor or damaged wiring, so the error will reappear once the board attempts to read the sensor again during operation.
How much does it cost to repair a Viking cooktop showing the 6 Flashes error?
Repair costs vary depending on what component has failed. A replacement temperature sensor or thermistor is typically an inexpensive part, and the repair may cost anywhere from $100 to $250 including labor if only the sensor and harness are involved. If the control board has also been damaged, total repair costs can rise to the $300 to $600 range or higher depending on the specific model and local labor rates.

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