Frigidaire Refrigerator Error Code t3

The T3 error code indicates a failure of the TH3 thermistor, which monitors the suction line temperature on the ice maker system. The control board has detected that the sensor circuit is either open or shorted, meaning the resistance reading is outside the valid range. This fault prevents the refrigerator from accurately monitoring that part of the refrigeration circuit.

The main refrigerator compartment and freezer may continue to cool normally while the T3 error is present, but the ice maker system will likely be affected and could stop producing ice. It is generally safe to keep the unit running in the short term, but leaving the fault unresolved can lead to additional issues such as ice maker freeze-up or erratic defrost behavior in that circuit.

If only the TH3 thermistor needs replacement, the part cost is typically in the range of $15 to $50, making it one of the more affordable refrigerator repairs. If a wiring harness or control board is also involved, total repair costs including labor can range from $100 to $350 or more depending on the specific components needed and local service rates.

A knowledgeable DIYer can diagnose this fault by using a multimeter to test the TH3 thermistor's resistance and inspecting the wiring harness and connector for damage or corrosion. If the thermistor has failed, replacing it is a relatively straightforward repair involving disconnecting the old sensor and connecting a compatible replacement. If the control board is found to be at fault, that repair is more involved and may warrant professional service.

A power reset by unplugging the refrigerator for a few minutes may temporarily clear the error code from the display, but if the TH3 thermistor or its wiring is genuinely faulty, the T3 code will return once the control board runs its diagnostics again. A reset alone does not fix the underlying sensor or wiring problem.