LG LMXS28626S Refrigerator Problems & Error Codes — Overview
The LG LMXS28626S is a French-door refrigerator with bottom freezer and ice/water dispenser. Common reliability issues on this model include sensor faults (rS and dS codes), freezer fan errors (FF code), ice maker fan and sensor problems (IS or 15 code), and communication faults between the display and dispenser (C1 code). Most of these failures trace back to connector issues, sensor drift or failure, frost buildup blocking airflow, or failed motors.
Most Common Problems on This Model
- rS error code on display Caused by a loose or corroded connector at the refrigerator temperature sensor, or a shorted or open sensor that needs replacement after testing resistance.
- dS error code on display Defrost sensor is disconnected, shorted, or open, usually from a bad connector or a failed defrost thermistor that must be replaced.
- FF error code or freezer not cooling Freezer evaporator fan motor has failed or is blocked by ice buildup from a defrost failure, requiring fan motor replacement or a full defrost cycle and heater check.
- IS or 15 error code Ice maker fan motor has failed or the ice maker sensor is disconnected, fixed by reconnecting the sensor harness or replacing the ice maker fan motor assembly.
- C1 error code on display Communication fault between the LCD display board and the dispenser control board, often fixed by reseating connectors or replacing the dispenser control PCB.
- 22 or 33 error code Compressor relay has failed or is not signaling correctly, requiring replacement of the compressor start relay or main control board depending on diagnosis.
- Refrigerator runs but temps too warm Evaporator coil is iced over from defrost heater or timer failure, or the evaporator fan is not circulating air due to motor or wiring fault.
- Ice maker stops making ice or dispenser not working Ice maker assembly or dispenser actuator has failed, or the water inlet valve is clogged or electrically open and needs replacement.
Parts That Commonly Fail
| Part | Notes |
|---|---|
| Refrigerator temperature sensor (rS fault) | Amazon | Thermistor that monitors fresh-food compartment temp, common failure on this model. |
| Defrost sensor/thermistor (dS fault) | Amazon | Monitors evaporator temperature during defrost cycle, fails open or shorted. |
| Freezer evaporator fan motor | Amazon | Circulates air over evaporator coil, fails mechanically or electrically causing FF code. |
| Ice maker fan motor assembly | Amazon | Cools ice maker compartment, triggers IS/15 code when motor or sensor fails. |
Refrigerator Error Codes for This Model
These codes apply to this model line:
- Lg Refrigerator C1 error code
- Lg Refrigerator Cf error code
- Lg Refrigerator Co error code
- Lg Refrigerator Dh error code
- Lg Refrigerator Ds error code
- Lg Refrigerator Eid error code
- Lg Refrigerator Eiu error code
- Lg Refrigerator Ff error code
- Lg Refrigerator Fs error code
- Lg Refrigerator Gf error code
- Lg Refrigerator If error code
- Lg Refrigerator Is error code
When to Call a Pro
Call a tech if you see any error code and are not comfortable with multimeter diagnostics or soldering connectors. Compressor relay codes (22/33) and main board communication faults (C1) need a technician with the service manual resistance tables and board-level troubleshooting skills. Refrigerant system work, compressor replacement, and any sealed-system repair must be done by an EPA-certified technician. If frost keeps returning after manual defrost, the defrost heater, timer, or control board may need professional diagnosis and replacement.