As a gas cooktop, the LCG3091ST shares its core mechanism with the rest of LG’s cooktop lineup. On this platform, the F5 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 cooktop most often trace to one of a short list: the F5, F7 or F1 fault codes. We confirm which one applies against the model and serial number before ordering a part.
Key Features
- Electronic touch controls set into the cooktop surface
- Individually mapped burner or element zones
- Gas cooktop
Most Common Issues on This Model
F5 fault code — keypad or touch-control fault
F7 fault code — function-key stuck or shorted, sometimes from spilled liquid on the glass
F1 fault code — control-board fault