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Frigidaire Refrigerator Error Code t8

FRZ IM Temp Sensor failure.

Frigidaire codesFrigidaire refrigerator codes

FRZ IM Temp Sensor failure.

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  • 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
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What t8 means on a Frigidaire refrigerator

The t8 error code on a Frigidaire refrigerator indicates a failure in the freezer ice maker temperature sensor. This sensor is a thermistor, a resistive component whose electrical resistance changes predictably with temperature. The refrigerator's control board monitors the resistance output of this thermistor to determine the temperature in the ice maker compartment. When the control board detects a resistance reading that falls outside the expected range, either an open circuit, a short circuit, or a grossly out-of-range value, it flags the t8 code to alert the user or technician to the fault.

The ice maker temperature sensor plays a critical role in regulating ice production cycles. It tells the control board when conditions are cold enough to initiate a harvest cycle and helps prevent ice maker operation under unsafe thermal conditions. A failure in this sensor can cause the ice maker to stop producing ice entirely, produce ice inconsistently, or behave erratically, even if the freezer itself is maintaining proper temperature.

The most common causes of this error include a damaged or degraded thermistor, a wiring harness problem such as a broken wire or corroded connector between the sensor and the control board, or in less common cases, a faulty main control board that is misreading a properly functioning sensor. Diagnosing the fault requires checking the sensor's resistance at a known temperature and inspecting the wiring for continuity and physical damage.

Source: manufacturer service documentation.

Common causes of t8

  1. 01

    Failed Freezer Ice Maker Thermistor

    Part replacement

    The thermistor itself can fail due to age, moisture exposure, or physical damage, resulting in an open or shorted circuit. Checking the sensor's resistance with a multimeter and comparing it to the expected value at a known temperature will confirm this fault.

  2. 02

    Damaged or Broken Wiring Harness

    Part replacement

    The wiring connecting the ice maker temperature sensor to the control board can develop breaks, fraying, or loose connections, especially near the freezer door hinge area where wires flex repeatedly. A continuity test along the harness will reveal any open or intermittent connections.

  3. 03

    Corroded or Loose Sensor Connector

    Wiring / connection

    The connector between the thermistor and the wiring harness can accumulate frost, moisture, or corrosion over time, increasing resistance or interrupting the signal entirely. Inspecting and cleaning the connector terminals may resolve the fault without replacing the sensor.

  4. 04

    Ice Maker Assembly Damage

    Part replacement

    If the ice maker module itself has been physically damaged, the integrated or attached temperature sensor may have been compromised along with it. Inspecting the ice maker assembly for cracks, burn marks, or water damage can help identify this scenario.

  5. 05

    Faulty Main Control Board

    Part replacement

    In rare cases, the main control board may misinterpret a signal from a properly functioning thermistor, generating a false t8 code. This is typically diagnosed only after the sensor and wiring have been confirmed to be in good condition.

See the test procedure for each cause

Frequently asked questions about t8

What does t8 mean on a Frigidaire refrigerator?
The t8 code on a Frigidaire refrigerator indicates a failure in the freezer ice maker temperature sensor, also called a thermistor. The control board has detected that the sensor is sending a signal outside the acceptable resistance range, which can mean the sensor has failed, the wiring is damaged, or there is a connection problem. The ice maker will typically stop functioning while this code is active, but the rest of the refrigerator may continue to cool normally.
Can I fix the t8 error code on my Frigidaire refrigerator myself?
A knowledgeable DIYer with basic electrical skills and a multimeter can diagnose this error by testing the thermistor resistance and inspecting the wiring harness for damage or corrosion. If the sensor itself has failed, replacing a thermistor is a relatively straightforward repair on most Frigidaire models. However, if the control board is the root cause, that repair is more complex and may warrant professional service.
Is it safe to use my refrigerator while the t8 error code is displayed?
The main refrigerator and freezer compartments will generally continue to cool normally during a t8 fault, so stored food is typically not at immediate risk. However, the ice maker will likely stop producing ice while the fault is active. You should address the error promptly to restore full ice maker function and to ensure the control board is receiving accurate thermal data from the freezer compartment.
How much does it cost to repair a t8 error code on a Frigidaire refrigerator?
If the repair requires only a new ice maker thermistor, parts typically cost in the range of $15 to $50 depending on the specific model. If the wiring harness needs replacement, costs can rise to $40 to $100 or more for parts. A professional repair visit, including labor, generally ranges from $100 to $300 total, with control board replacement representing the higher end of that range.
Will resetting my Frigidaire refrigerator clear the t8 error code?
Unplugging the refrigerator for a few minutes may temporarily clear the t8 code, but if the underlying sensor or wiring fault is still present, the code will return once the control board completes its diagnostics. A reset is useful for confirming whether the fault is intermittent or persistent, but it does not correct the hardware problem causing the error. Proper diagnosis and repair of the thermistor or wiring are necessary for a permanent fix.

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