mypros+
Error code reference

Frigidaire Ice Maker Error Code 3 blinks

Evaporator thermistor is out-of-range (senses temperature outside 0-140°F), all loads shut off and unit will…

Frigidaire codesFrigidaire ice maker codes

Evaporator thermistor is out-of-range (senses temperature outside 0-140°F), all loads shut off and unit will not run.

First step from the service manual

Test the evaporator thermistor resistance and compare with Table C; replace if out of specification.

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

MyPros+ Max

Get the full diagnostic procedure for 3 blinks.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What 3 blinks means on a Frigidaire ice maker

The 3-blink error code on a Frigidaire ice maker indicates that the evaporator thermistor has reported a temperature reading outside the acceptable range of 0 to 140 degrees Fahrenheit. The evaporator thermistor is a temperature-sensing resistor mounted on or near the evaporator coil. It continuously reports thermal data to the control board so the unit can manage the freeze and harvest cycles correctly. When the control board receives a signal that falls outside the valid operating window, it interprets this as a fault condition and immediately shuts off all loads, meaning the compressor, fans, and water valve stop operating entirely until the fault is resolved.

The most direct way to diagnose this fault is to test the thermistor's resistance using a multimeter and compare the reading against the resistance-versus-temperature table (Table C in the technical documentation). A properly functioning thermistor will show a predictable resistance value that corresponds to the ambient or evaporator temperature at the time of testing. A reading that is significantly out of range, open (infinite resistance), or shorted (near-zero resistance) confirms the thermistor has failed and needs to be replaced.

Beyond thermistor failure itself, wiring issues between the thermistor and the control board can produce the same fault. Corroded terminals, a pinched harness, or a loose connector can cause the control board to see an erroneous signal. In some cases, the control board itself may misinterpret a valid thermistor signal due to a board-level fault, though this is the least common cause. Starting with a resistance test and wiring inspection covers the vast majority of 3-blink fault scenarios before considering board replacement.

Source: manufacturer service documentation.

Common causes of 3 blinks

  1. 01

    Failed evaporator thermistor

    Part replacement

    The thermistor itself has failed open or shorted, producing a resistance value outside the range that corresponds to 0-140 degrees Fahrenheit. Testing with a multimeter and comparing against Table C will confirm this directly.

  2. 02

    Damaged or disconnected thermistor wiring

    Wiring / connection

    A broken wire, corroded terminal, or loose connector in the thermistor harness can cause the control board to read an invalid signal even when the thermistor is functioning correctly. Inspect the wiring from the thermistor to the control board for visible damage or poor connections.

  3. 03

    Corroded or oxidized thermistor connector

    Wiring / connection

    Moisture inside the ice maker cabinet can cause the connector pins to oxidize, increasing resistance in the circuit and throwing off the thermistor reading. Cleaning or replacing the connector may restore a normal signal.

  4. 04

    Thermistor positioned incorrectly or dislodged

    Wiring / connection

    If the thermistor has shifted away from its mounting point on the evaporator, it may be reading ambient air temperature rather than the evaporator surface, producing an out-of-range value. Check that the thermistor is properly seated and secured in its clip or bracket.

  5. 05

    Faulty control board

    Part replacement

    In rare cases, the control board may misinterpret a valid thermistor signal due to a component failure on the board itself. This should only be considered after the thermistor and all wiring have been tested and confirmed good.

See the test procedure for each cause

Frequently asked questions about 3 blinks

What does 3 blinks mean on a Frigidaire ice_maker?
Three blinks on a Frigidaire ice maker indicates the evaporator thermistor is reporting a temperature outside the valid range of 0 to 140 degrees Fahrenheit. When this fault is detected, the control board shuts off all loads including the compressor, fans, and water valve. The unit will not produce ice until the fault is resolved. The thermistor or its wiring circuit should be tested as the first step.
Can I fix the 3-blink error on my Frigidaire ice maker myself?
A knowledgeable DIYer can diagnose this fault by testing the evaporator thermistor resistance with a multimeter and comparing the reading to the specification table. If the thermistor reads open or shorted, replacing it is a straightforward repair involving disconnecting the harness and swapping the part. Wiring inspection and connector cleaning are also within reach for someone comfortable working on appliances. Control board replacement is more involved and may warrant a professional technician.
Will resetting the ice maker clear the 3-blink error code?
A power reset may temporarily clear the error and allow the unit to attempt operation, but if the thermistor or its wiring is genuinely out of specification, the fault will return and the unit will shut down again. The 3-blink code reflects a measured condition, not a random software glitch, so the underlying hardware issue must be corrected for the fault to clear permanently. Always perform a resistance test on the thermistor before assuming a reset has resolved the problem.
Is it safe to use my Frigidaire ice maker while it is showing the 3-blink error?
When the 3-blink fault is active, the control board has already shut the unit down, so it is not producing ice or running any components. There is no immediate safety hazard from the fault itself, but you should not attempt to bypass the shutdown or force the unit to run while the thermistor circuit is unresolved. Address the thermistor fault before returning the unit to service.
How much does it cost to repair a Frigidaire ice maker with the 3-blink error?
If only the evaporator thermistor needs replacement, parts typically cost in the range of $15 to $50 depending on the model, making it one of the more affordable repairs. If a professional technician is needed, labor charges will add to that total, generally bringing the overall cost to somewhere between $100 and $250. Control board replacement, if required, is more expensive, with parts alone ranging from $80 to $200 or more. Getting a diagnosis first helps avoid replacing parts unnecessarily.

Related Frigidaire ice maker codes

All Frigidaire ice maker codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass