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MODEL OVERVIEW
About this model: GE GDT645SSNSS
GE GDT645SSNSS is a stainless top-control dishwasher for sixteen place settings, with adjustable rack, bottle jets, fan-assisted Dry Boost and a verified LEAK DETECTED alert.
Identify the stainless top-control layout
GDT645SSNSS is GE's stainless-steel, built-in top-control dishwasher. Its eight touchpads sit along the door's upper edge; GE specifies a three-digit cycle countdown and a two-color status light visible on the door front. The capacity is sixteen place settings, with a height-adjustable upper rack that can be raised to make room below or lowered for taller glasses above. Four bottle jets direct wash water into narrow vessels when that option is selected. These details distinguish the machine from a front-control dial dishwasher even if both are GE models. The linked owner's booklet depicts a GD*645 control strip on physical page six. The full sales suffix does not appear there, so the exact manufacturer's GDT645SSNSS listing, its owner-manual link, control layout and feature list establish the connection. Check the inside-tub model label before using this article for another appliance.
Understand the water-sensor interruption
A displayed LEAK DETECTED message has a specific meaning on this SKU. GE's exact product record names Active Flood Protect and a Water Leak Sensor, confirming that the family manual's leak-protection passage applies here despite its “on some models” wording. On page six, the manual says a detected leak stops the cycle and drains the dishwasher. Page twenty-two calls the screen message a possible leak and directs the owner to service. It does not identify a broken hose, valve or sensor from the words alone, and it supplies no owner repair steps. Preserve the literal text and contact service rather than repeatedly restarting a water-filled cycle. An interrupted wash can also cause a flashing Start status, and a door left open can beep. The troubleshooting page treats those as door or cycle states, not as LEAK DETECTED. Read the written message before interpreting an isolated lamp or beep.
Choose cycles around the actual load
The exact model offers AutoSense, Heavy, Normal, Light and One Hour wash cycles. AutoSense adjusts its wash after sensing soil, while the one-hour choice is meant for lightly soiled dishes, not a heavily baked-on pan. Upper-only and lower-only wash zones let a smaller load receive attention without waiting to fill both racks. Four bottle jets help with suitable tall bottles; leave spray arms free when positioning them. The sanitizing option is certified to NSF 184, but the manual explains that the SANITIZED indication depends on achieving the required conditions. If a cycle is interrupted or inlet water is too cool, that light may remain off even though washing occurred. Such a result should be described by the selected cycle and conditions, not rebranded as a leak alarm. Keeping ordinary cleaning outcomes separate from the literal alert makes troubleshooting much more precise.
Time and dry a mixed load
With top-edge controls, starting a selected wash requires pressing Start and closing the door within four seconds. A one-to-twelve-hour delay can postpone the beginning; the three-digit countdown should be read together with that selected delay. While washing, the door-front status light is amber and changes to white on completion. These colors convey progress rather than a numbered error. For drying, GDT645SSNSS lists both Dry Boost and fan assistance. Wet plastics after a short wash call for checking the drying choice, rinse aid and how dishes were loaded, while recognizing that the brief cycle prioritizes speed. A stronger dry selection may lengthen total time. This ordinary variation is very different from a cycle that stops, drains and displays LEAK DETECTED. Record the sequence of lights, selected options and full text if asking GE for help.
Care for the SS door and filtration
The SS at the end of GDT645SSNSS has a practical maintenance role. The linked guide groups SS and S1 suffixes under stainless-steel exterior door care, rather than its directions for coated slate or painted black finishes. Its inside tub and door are also stainless steel, while GE's filtration description names a removable filter alongside the Piranha food disposer. The manual recommends looking at filters periodically, about every other month depending on use, especially when grit appears on dishes or cleaning declines. Routine filter care may explain wash quality, but it does not supersede a displayed leak warning or the service instruction. Note the model and serial label inside the tub, the exact error text and whether the cycle drained when reporting a possible leak. That account ties the observation to this stainless top-control configuration and avoids applying the unrelated GSD4000 flashing-light table to it.
Verified model details
The exact stainless model has a GD*645 top-control panel and three-digit display.
Source for this detailIts water sensor supports the literal LEAK DETECTED warning in the linked PDF.
Source for this detailNormal Start and status-light behavior are separate from the leak response.
Source for this detail · Source page: 22
This description summarizes the linked source documents; check each cited source for your exact model and region.
Manufacturer source
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GE® ENERGY STAR® Top Control with Stainless Steel Interior Dishwasher with Sanitize Cycle & Dry Boost with Fan Assist - GDT645SSNSS - GE Appliances
Open official sourceIf there is a safety risk, stop using the appliance and follow the manufacturer’s instructions.