As a combination wall oven (oven plus microwave in one cavity stack), the LSWC307ST shares its core mechanism with the rest of LG’s wall oven lineup at roughly 4.7 cu ft. On this platform, the F31 fault code is one of the more common reasons it gets a service call. LG’s own US product page flags this exact model discontinued (read 24 September 2026); it is out of production but not out of the field, and it is exactly the kind of model that has nowhere else to turn for support.
Service calls on this wall oven most often trace to one of a short list: the F31, F1 or F2 fault codes. We confirm which one applies against the model and serial number before ordering a part.
Key Features
- Electronic touch control with a digital display
- Convection fan in the main cavity
- Combination wall oven (oven plus microwave in one cavity stack)
- Rated at 4.7 cu. ft.
Most Common Issues on This Model
F31 fault code — second-cavity fault on double-oven control boards
F1 fault code — control-board fault
F2 fault code — oven temperature sensor fault