As a over-the-range microwave, the LSMH207ST shares its core mechanism with the rest of LG’s microwave lineup. On this platform, the F3 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 microwave most often trace to one of a short list: the F3 fault code, vent fan or light failing on an over-the-range model while heating still works, or turntable motor stalling while the magnetron still heats. We confirm which one applies against the model and serial number before ordering a part.
Key Features
- Turntable-driven even heating
- Electronic touch control with a digital display and clock
- Over-the-range microwave
- Sold under the LG STUDIO badge
Most Common Issues on This Model
F3 fault code — control fault LG documents specifically for microwaves
Vent fan or light failing on an over-the-range model while heating still works
Turntable motor stalling while the magnetron still heats