LG Oven Error Code F-19

The F-19 code means the lower oven is not heating properly. The control board monitors whether the lower cavity temperature rises above 150°F (66°C) within 5 minutes of starting a cycle, and if it does not, F-19 is triggered. The fault points to a problem in the lower oven heating circuit, which can include the heating element, the DLB relay, or the connecting wiring.

No, you should not attempt to use the oven while this error is active. The lower oven is not heating to a safe or functional temperature, meaning food will not cook properly. More importantly, a fault in the relay or wiring could pose an electrical hazard. Stop using the oven and address the fault before resuming normal operation.

Repair costs vary depending on which component has failed. A replacement lower bake element typically ranges from $30 to $100 for the part itself, while a control board or relay replacement can cost considerably more. Adding professional labor, total repair costs can range from $150 to $400 or more depending on your location and the specific parts required. Getting a diagnostic service call first can help you determine whether repair or replacement makes more financial sense.

Some steps are within reach for a confident DIYer, such as visually inspecting the lower heating element for visible damage or checking for loose terminal connections. However, diagnosing the DLB relay and testing wiring resistance requires a multimeter and working around 240V circuits, which carries a serious shock risk. Always disconnect power at the breaker before inspecting internal components, and consider calling a qualified technician if you are not comfortable with electrical diagnostics.

Resetting the oven by cutting power at the breaker for a few minutes may temporarily clear the F-19 code, but if the underlying component failure is still present, the code will return as soon as the oven attempts to heat again. A reset alone is not a repair. The heating element, relay, and wiring must be diagnosed and any failed parts replaced to permanently resolve the fault.