The GDT645SYNFS is one of the most widely installed GE top-control dishwashers, so its failure patterns are familiar. Drainage complaints usually start outside the machine: a blocked air gap, a sink disposer that has not been run, or a drain hose that has lost its high loop.
Poor drying is often a loading or rinse-aid issue rather than a fault, since plastics hold heat poorly and a full third rack blocks airflow. Before any teardown, switch the dishwasher off at the breaker if you intend to check the drain hose behind it, and keep towels ready for the water the sump will release.
Key Features
- Top control dishwasher with a stainless steel interior
- Fingerprint resistant exterior finish
- Sanitize cycle and Dry Boost with fan assist
- Third-level rack on this build
Most Common Issues on This Model
Standing water left in the sump at the end of a cycle
Dishes still wet despite Dry Boost being selected
Cycle stopping part way with the lights still on
Detergent pod not dissolving fully