How to Fix Dishes Not Drying on a GE GDT645SYNFS Dishwasher — Step-by-Step Instructions
Step-by-step instructions for the GE GDT645SYNFS (dishwasher, top control, dry boost). Parts and access points can differ slightly by production year — the steps below cover the common layout for this platform, and the model notes flag its quirks.
If you test the heating element, kill the breaker first.
Tools
- Multimeter (only if testing the element)
Parts
- Rinse aid ($5–$8); heating element only if it tests dead
Step by step
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1 Fill the rinse aid and set it high
The unglamorous fix that works: fill the dispenser, set its dosage to maximum, and give it two weeks of loads. Rinse aid is how modern dishwashers dry.
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2 Use the heat/extra-dry option
Eco and quick cycles skip heated dry on many machines. Turn on the heated dry, extra dry, or sanitize option and compare.
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3 Open the door at cycle end
Condensation-dry machines (Bosch-style, no exposed element) benefit hugely from cracking the door when the cycle ends — some do it automatically.
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4 Check the heating element (exposed-element machines)
If dishes AND the tub interior are cold at cycle end, breaker off, then continuity-test the element at its terminals under the tub — open circuit means replace it.
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5 Load for drainage
Cups angled, plastics up top, nothing nested. Water pooled in mug bottoms isn’t a machine fault — it’s geometry.
GE GDT645SYNFS notes & error codes
Fine filter = monthly rinse. Dry Boost still benefits from rinse aid — the two are additive, not alternatives.
| Code | What it means |
|---|---|
| H2O | Fill |
| PrS | Pressure sensor |
| LEAK | Base moisture |
Full details for this machine — common problems, causes, and costs — are in the GE GDT645SYNFS repair guide. The general version of these instructions is here.
A dead heating element or a stuck vent fan is a modest repair — worth a pro visit if under-tub electrical work isn’t your idea of a weekend. If you'd rather skip it entirely, find a dishwasher repair pro near you →
What this repair costs professionally
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