As a top-control dishwasher, the LDF7774ST shares its core mechanism with the rest of LG’s dishwasher lineup. On this platform, the FE 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 dishwasher most often trace to one of a short list: the FE, tE or HE fault codes. We confirm which one applies against the model and serial number before ordering a part.
Key Features
- Filtration system ahead of the circulation pump
- Electronic cycle control with a digital or LED display
- Top-control dishwasher
- Sold in 4 finish options on this platform
Most Common Issues on This Model
FE fault code — overfilling or leakage, sometimes shown as AE or EI on older models
tE fault code — temperature-sensor fault affecting the wash or dry cycle
HE fault code — heater error, affecting Heat Dry and wash temperature