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Error code reference

GE Refrigerator Error Code t3

Ice Maker TH3 suction line sensor open or shorted (freezer displays Ice, fresh food displays t3).

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Ice Maker TH3 suction line sensor open or shorted (freezer displays Ice, fresh food displays t3).

First step from the service manual

Go to flow chart for Ice t3 error.

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

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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 t3 means on a GE refrigerator

The GE refrigerator error code t3 refers to a fault detected in the TH3 suction line temperature sensor within the ice maker system. When this code is active, the freezer display shows "Ice" while the fresh food compartment display shows "t3," indicating the control board has detected that the TH3 sensor circuit is either open or shorted. The suction line sensor monitors refrigerant suction line temperatures as part of the ice maker's operational feedback loop, allowing the control system to regulate ice production cycles accurately.

An open circuit condition means the sensor or its wiring has lost continuity, often due to a broken wire, corroded connector, or a failed sensor element with resistance outside the expected range. A shorted condition occurs when the sensor circuit reads an abnormally low resistance, which can result from a damaged sensor, pinched wiring, or moisture intrusion into the connector. Both fault types cause the control board to flag the sensor as unreliable and trigger the t3 code.

Diagnosing this fault requires following the dedicated Ice t3 flow chart, which guides technicians through checking sensor resistance, inspecting wiring harness continuity, and evaluating connector integrity at the sensor and control board. Component testing with a multimeter is essential to distinguish between a failed sensor and a wiring issue before replacing parts.

Source: manufacturer service documentation.

Common causes of t3

  1. 01

    Failed TH3 suction line sensor

    Part replacement

    The sensor itself may have failed internally, producing a resistance reading that falls outside the normal operating range. Testing the sensor with a multimeter will confirm whether it is open or shorted.

  2. 02

    Damaged or broken wiring harness

    Wiring / connection

    The wiring between the TH3 sensor and the control board can develop breaks or corrosion over time, particularly in the cold and humid environment near the ice maker. Inspect the harness for cuts, kinks, or brittle insulation.

  3. 03

    Corroded or loose connector

    Wiring / connection

    Moisture in the freezer compartment can cause oxidation at the sensor connector or the control board connector, increasing resistance or breaking continuity entirely. Cleaning or reseating the connector may resolve the fault.

  4. 04

    Moisture or ice intrusion into connector

    Wiring / connection

    Ice buildup around the sensor or its connector can cause intermittent short circuits. Inspect for frost accumulation around the sensor mount and connector housing.

  5. 05

    Control board fault

    Part replacement

    If the wiring and sensor both test within normal specifications, the control board may be misreading the sensor circuit. This is the least likely cause and should only be considered after all other components are confirmed functional.

See the test procedure for each cause

Frequently asked questions about t3

What does t3 mean on a GE refrigerator?
The t3 code on a GE refrigerator indicates a problem with the TH3 suction line temperature sensor in the ice maker system. The control board has detected that this sensor circuit is either open (no continuity) or shorted (abnormally low resistance). When active, the freezer display shows "Ice" and the fresh food display shows "t3." The ice maker may not operate correctly while this code is present.
Can I fix the t3 error on my GE refrigerator myself?
A knowledgeable DIYer can begin by inspecting the wiring harness and connectors leading to the TH3 sensor for visible damage, corrosion, or loose connections. Testing the sensor resistance with a multimeter is the next step, following the Ice t3 diagnostic flow chart. If the sensor has failed, replacing it is a manageable repair. However, if the control board is involved, professional service is recommended.
Is it safe to keep using my refrigerator with a t3 error code?
A t3 error code relates specifically to the ice maker sensor and does not directly affect the refrigerator or freezer cooling systems. Food stored in the refrigerator and freezer compartments should remain safe as long as temperatures are maintained. However, the ice maker may not function properly, and the issue should be diagnosed and repaired to prevent any further complications.
How much does it cost to repair a GE refrigerator t3 error?
If the fix is simply cleaning or reseating a corroded connector, there may be little to no parts cost involved. Replacing the TH3 suction line sensor typically costs between $20 and $60 for the part, plus labor if a technician is hired. If the control board requires replacement, costs can range from $150 to $400 or more depending on the model and service fees.
Will resetting my GE refrigerator clear the t3 error code?
A power reset may temporarily clear the t3 code from the display, but if the underlying sensor or wiring fault still exists, the code will return once the control board runs its diagnostics again. Resetting the unit is not a fix for this error. The TH3 sensor circuit needs to be inspected and repaired or replaced to resolve the fault permanently.

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