LG LREL6323S Oven Problems & Error Codes — Overview
The LG LREL6323S electric range shares error code architecture and heating circuits with other LG range platforms, so most faults show generic display codes tied to temperature sensor issues, heating element failures, or control board communication problems. LG’s troubleshooting material for this model family treats oven performance complaints as sensor-related, element-related, or control-related, with thermistor errors and no-heat conditions being the most frequent service calls.
Common reliability issues center on the oven temperature sensor circuit, which can throw thermistor-type error codes when the sensor or its wiring fails, and on bake element burnout, which prevents the oven from reaching temperature during preheat. Control board communication faults and door seal problems also appear in LG’s published guidance for this platform. Most codes clear with a power reset, but if the fault returns immediately the failed component needs replacement.
Most Common Problems on This Model
- Thermistor error code on display Failed oven temperature sensor or damaged wiring between the sensor and control board causes the thermistor fault code, requiring sensor replacement or harness repair.
- Oven does not heat or stays cold during preheat Open bake element or failed element relay prevents current flow to the heating circuit, and replacing the bake element or inspecting relay contacts on the control board fixes it.
- Oven temperature runs too hot or too cold Sensor drift or calibration offset causes erratic temperature behavior, fixed by replacing the temperature sensor or adjusting the oven thermostat by 5-degree increments up to 35 degrees total.
- Error code returns immediately after power reset Control board communication failure or internal PCB fault causes persistent error codes that reappear on every startup, requiring main control board replacement.
- Oven does not reach 150°F within 5 minutes of preheat Weak heating element, poor door seal, or low incoming voltage prevents proper heat rise, and checking the bake element continuity, door gasket fit, and supply voltage at the range terminal block identifies the fault.
- Display shows low voltage or communication error code Incoming supply voltage below rated level or loose connector at the control board triggers the fault, and verifying 240V at the terminal block or reseating board connectors corrects it.
- Oven temperature exceeds 650°F continuously for 2 minutes outside of clean cycle Stuck relay on the control board or failed temperature sensor feedback allows uncontrolled heating, requiring control board or sensor replacement.
- Oven fan does not run during preheat Failed convection fan motor or open wiring to the fan prevents air circulation and even heating, and replacing the fan motor or repairing the harness fixes performance.
Parts That Commonly Fail
| Part | Notes |
|---|---|
| Oven temperature sensor / thermistor | Amazon | Most common cause of thermistor error codes and erratic oven temperature behavior on this platform. |
| Bake element | Amazon | Fails open and prevents oven from heating during preheat, confirmed by checking continuity across element terminals. |
| Main control board / PCB | Amazon | Responsible for persistent error codes, communication faults, and relay failures that cause heating or display problems. |
| Door gasket | Amazon | Tears or compression loss allow heat escape and prevent proper oven temperature rise during cooking. |
Oven Error Codes for This Model
These codes apply to this model line:
- Lg Oven F1 error code
- Lg Oven F10 error code
- Lg Oven F11 error code
- Lg Oven F12 error code
- Lg Oven F17 error code
- Lg Oven F19 error code
- Lg Oven F2 error code
- Lg Oven F3 error code
- Lg Oven F4 error code
- Lg Oven F5 error code
- Lg Oven F6 error code
- Lg Oven F7 error code
When to Call a Pro
Call a qualified appliance technician for any fault that returns after a power reset, for thermistor or communication error codes that require board-level diagnosis, or when incoming voltage measurement is needed at the range terminal block. Also call a pro for control board replacement, since it involves live 240V connections and programming the new board to match your model. If you see arcing, smell burning plastic, or the range trips the breaker repeatedly, disconnect power at the breaker and call for service immediately. For gas line, burner, or igniter work, or if you ever smell gas, stop and call a licensed technician.