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Error code reference

Viking Ice Maker Error Code 2 blinks

Bin sensor is open or shorted (thermistor failure).

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Bin sensor is open or shorted (thermistor failure).

First step from the service manual

Disconnect and remove bin thermistor, measure resistance across wire leads and compare to Resistance versus Temperature Chart.

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

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What 2 blinks means on a Viking ice maker

The 2-blink error code on a Viking ice maker indicates that the bin thermistor (bin sensor) has been detected as either open or shorted. The bin thermistor is a negative temperature coefficient (NTC) resistor that monitors the temperature at the ice bin to determine when the bin is full. When ice reaches the sensor, the temperature drops, and the control board reads the corresponding resistance change to halt ice production. If the thermistor circuit is open or shorted, the board receives an out-of-range signal and triggers this fault code to prevent erratic operation.

The primary diagnostic procedure involves disconnecting the bin thermistor from the wiring harness, then measuring resistance across the two wire leads with a multimeter. That reading must be compared against the Resistance versus Temperature Chart specific to this unit. A thermistor in good working order will show a predictable, smooth resistance curve as temperature changes. A reading of zero ohms (or near zero) indicates a short circuit within the sensor or the wiring, while an infinite or open-line resistance reading indicates a broken internal element or a severed wire lead.

Common root causes include physical damage to the thermistor from repeated ice contact, corrosion at the connector terminals due to the humid environment inside the ice bin compartment, or wiring harness damage caused by pinching or abrasion. In some cases, the thermistor itself tests within spec but intermittent connector contact causes the fault to appear sporadically. Always inspect the connector and wire routing carefully before condemning the thermistor itself.

Source: manufacturer service documentation.

Common causes of 2 blinks

  1. 01

    Failed bin thermistor

    Part replacement

    The thermistor element itself has failed internally, producing a resistance reading that is either infinite (open) or near zero (shorted) when tested with a multimeter. This is the most frequent cause and is confirmed by comparing the measured resistance to the Resistance versus Temperature Chart.

  2. 02

    Corroded or loose connector terminals

    Wiring / connection

    The humid environment inside the ice bin compartment promotes corrosion at the thermistor connector pins, causing high resistance or intermittent open-circuit conditions. Inspect the connector for green or white oxidation and ensure the pins seat fully.

  3. 03

    Damaged wiring harness

    Part replacement

    The wire leads running from the bin thermistor to the control board can become pinched, abraded, or broken, creating an open or short in the circuit. Visually trace the wiring and flex the harness while monitoring resistance to identify intermittent breaks.

  4. 04

    Ice buildup contacting or displacing the sensor

    Wiring / connection

    Excessive ice accumulation can physically push the thermistor out of its mounting position or hold it in a position that simulates a full bin indefinitely, causing erroneous readings. Inspect sensor placement and clear any ice bridging around the sensor.

  5. 05

    Control board fault misreading the thermistor circuit

    Part replacement

    In rare cases, the control board itself may misinterpret a valid thermistor signal due to a board-level component failure. This should only be considered after the thermistor and wiring have been confirmed good through resistance testing.

See the test procedure for each cause

Frequently asked questions about 2 blinks

What does 2 blinks mean on a Viking ice_maker?
Two blinks on a Viking ice maker indicate that the bin thermistor (the sensor that monitors ice level and bin temperature) has been detected as open or shorted by the control board. This means the sensor's resistance reading is outside the expected range shown on the Resistance versus Temperature Chart. The machine will not operate normally until the fault is resolved. A technician should disconnect the thermistor and test its resistance with a multimeter to determine whether the sensor or wiring is at fault.
Can I fix a 2-blink error on my Viking ice maker myself?
A knowledgeable DIYer can perform the initial diagnostic step by disconnecting the bin thermistor and measuring resistance across the wire leads with a multimeter, then comparing that reading to the Resistance versus Temperature Chart. If the thermistor reads open or shorted, replacing the bin thermistor is a relatively straightforward repair. However, if the wiring harness or control board is involved, a qualified appliance technician is recommended.
Will resetting the Viking ice maker clear the 2-blink error code?
A power reset may temporarily clear the fault display, but the 2-blink code will return if the underlying thermistor or wiring problem has not been corrected. Resetting without addressing the root cause can also allow the machine to run unpredictably, since the control board relies on the bin sensor to manage ice production cycles. The fault must be resolved through proper diagnostic testing and repair.
Is it safe to use my Viking ice maker while it shows the 2-blink error?
Operating the ice maker with an active bin sensor fault is not recommended. Without a functioning bin thermistor, the unit cannot reliably detect when the ice bin is full, which could lead to ice overflow or continuous cycling that strains the compressor and other components. It is best to discontinue use until the sensor issue is diagnosed and repaired.
How much does it cost to fix a 2-blink bin sensor error on a Viking ice maker?
Repair costs depend on which component is faulty. A replacement bin thermistor typically costs in the range of $20 to $60 for the part alone. If a technician is required for diagnosis and installation, labor charges can bring the total to roughly $100 to $250 or more, depending on your location and service rates. Control board replacement, if needed, would increase costs significantly above that range.

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