The codes people search for most, what each one means and what to check first. Tap a code for causes and step-by-step checks.
| Code | What it means |
|---|---|
| F9 | Oven not heating properly LG lists F9 as the (upper) oven not heating properly: the oven did not warm up as expected, for example not passing about 150°F within a few minutes of preheating. |
| F1 F2, F4 | Oven temperature sensor error The oven temperature sensor (thermistor) is reading out of range, so the oven cannot control its temperature. F1 and F2 refer to the upper or only oven and F4 to the lower oven on double-oven models. |
| F3 F-3 | Touch pad key error The control senses that a touch pad key is stuck on, typically for a minute or more. The range may beep or stop accepting commands. |
| F10 F20 | Door lock failure The oven door lock system did not work as expected. F10 refers to the upper (or only) oven and F20 to the lower oven on double-oven models. It most often shows up around self-clean. |
| F11 | Communication error The range's control boards (such as the main board and the display) are not communicating properly. |
| PF | Power interruption Power to the range was interrupted, such as during an outage. It is a notice, not a part failure. |
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