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Error code reference

Whirlpool Freezer Error Code All LEDs blinking

Sensor defect (NTC temperature sensor failure)

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Sensor defect (NTC temperature sensor failure) - FAIL message state indicating the temperature sensor has failed or is unreliable.

First step from the service manual

Enter Service State to run diagnostics; check NTC sensor resistance values against the resistance vs. temperature table.

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

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What All LEDs blinking means on a Whirlpool freezer

When all LEDs blink simultaneously on a Whirlpool freezer, the unit is entering a FAIL message state that indicates a critical failure in the NTC (Negative Temperature Coefficient) temperature sensor circuit. The NTC sensor is a thermistor whose electrical resistance changes predictably with temperature, allowing the control board to monitor internal freezer conditions and regulate the compressor and other components accordingly. When the control board detects that the sensor's resistance readings fall outside the expected range or are completely unreliable, it triggers this all-LEDs-blinking alert to signal that temperature monitoring has been compromised.

The NTC sensor failure can manifest in two primary ways: an open circuit condition where resistance reads extremely high or infinite, or a short circuit condition where resistance reads near zero. Both scenarios produce readings that do not correspond to any valid point on the resistance versus temperature table, causing the control board to flag the sensor as defective. The diagnostic process requires entering the freezer's Service State to access sensor data and then comparing live resistance readings against the specification table to determine whether the sensor itself, the wiring harness, or the connector terminations are responsible for the fault.

Common contributing factors include physical damage to the sensor probe, moisture or ice intrusion into the sensor connector, wiring harness chafing against freezer cabinet components, or degradation of the thermistor element over time. Because the freezer cannot confirm its internal temperature in this state, it may default to a safe operating mode or run continuously, making prompt diagnosis important to preserve stored food and avoid unnecessary energy consumption.

Source: manufacturer service documentation.

Common causes of All LEDs blinking

  1. 01

    Faulty NTC thermistor sensor

    Part replacement

    The thermistor element itself has degraded or failed, producing resistance values that do not match the expected temperature curve. Comparing the sensor's measured resistance to the resistance versus temperature table will confirm whether the component needs replacement.

  2. 02

    Damaged or corroded sensor connector

    Wiring / connection

    Moisture, ice, or corrosion at the sensor connector can interrupt the circuit or introduce erratic resistance readings. Inspect the connector pins for discoloration, oxidation, or physical damage and clean or replace as needed.

  3. 03

    Wiring harness damage

    Part replacement

    The wire leads running from the NTC sensor to the control board can become chafed, pinched, or broken, especially where they route near sharp cabinet edges or moving parts. A continuity check along the full harness length will isolate any open or short circuit.

  4. 04

    Control board failure

    Part replacement

    If the sensor and wiring both check out correctly against specification, the control board itself may be misreading or failing to process the sensor signal. This is the least common cause and should be considered after all sensor circuit components have been tested.

See the test procedure for each cause

Frequently asked questions about All LEDs blinking

What does All LEDs blinking mean on a Whirlpool freezer?
All LEDs blinking on a Whirlpool freezer indicates a FAIL state triggered by a detected NTC temperature sensor failure. The control board has determined that the sensor's resistance readings are outside the valid range or are unreliable, so it cannot accurately monitor the freezer's internal temperature. This is not a minor alert and should be diagnosed promptly to protect stored food and prevent the unit from running incorrectly.
Can I fix the All LEDs blinking error myself?
A knowledgeable DIYer can perform several diagnostic steps, including entering Service State and checking the NTC sensor's resistance against the temperature table using a multimeter. If the sensor is open or shorted and physically accessible, replacing the thermistor is a manageable repair. However, if the fault traces back to the control board, that replacement is more involved and may be better handled by a technician.
Will resetting the freezer clear the All LEDs blinking error?
A simple power reset is unlikely to permanently clear this error because the fault is tied to an actual sensor circuit problem rather than a software glitch. The blinking will likely return as soon as the control board re-evaluates the sensor signal. The underlying sensor, wiring, or connector issue must be identified and corrected before the error will clear and stay clear.
Is it safe to keep using my Whirlpool freezer when all the LEDs are blinking?
Continuing to use the freezer with this error is risky because the unit can no longer confirm its internal temperature accurately. The compressor may run continuously or behave erratically, which could lead to food spoilage or excessive energy use. It is best to move perishable items to another freezer and address the repair as quickly as possible.
How much does it cost to repair the All LEDs blinking error on a Whirlpool freezer?
Repair costs vary depending on the root cause. An NTC thermistor sensor replacement typically involves parts costs in the range of $15 to $60, plus labor if a technician is hired. A wiring harness repair or connector replacement usually falls in a similar parts range. If the control board is at fault, parts alone can run from $80 to $200 or more, making that scenario the most expensive outcome.

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