As a French 3-door refrigerator, the LFX31945ST shares its core mechanism with the rest of LG’s refrigerator lineup. On this platform, the FF 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 refrigerator most often trace to one of a short list: the FF, IF or dH fault codes. We confirm which one applies against the model and serial number before ordering a part.
Key Features
- Door-ajar alarm
- Frost-free cooling with a fan-driven air path between compartments
- French 3-door refrigerator
Most Common Issues on This Model
01
FF fault code — freezer fan motor
02
IF fault code — ice-fan fault
03
dH fault code — defrost heater fault, sometimes shown split as F dH