GE Appliances GDT645SYNFS dishwasher won't start or run
Cause 1 of 4The Start sequence was not followed. The cycle starts only if the door is closed within 4 seconds of pressing Start. Source: Getting started: Start; Troubleshooting Tips: Dishwasher won't run, p. 9
First checkPress Start and close the door within 4 seconds.
Causes and checks
The Start sequence was not followed. The cycle starts only if the door is closed within 4 seconds of pressing Start. Source: Getting started: Start; Troubleshooting Tips: Dishwasher won't run, p. 9
- Press Start and close the door within 4 seconds.
The control panel is locked. Source: Troubleshooting Tips: Dishwasher won't run, p. 23
- Unlock the controls by holding the lock pad for 3 seconds.
A fuse is blown or the circuit breaker has tripped. Source: Troubleshooting Tips: Dishwasher won't run, p. 23
- Replace the fuse or reset the breaker, and remove other appliances from that circuit.
The power is switched off at a wall switch. Some installations feed the dishwasher through a switch, often next to the disposer switch. Source: Troubleshooting Tips: Dishwasher won't run; Safety information: Notice, pp. 5, 23
- Turn the wall switch on. After switching it on, wait 5–10 seconds before touching Start so the control can start up.
All 4 causes checked. Contact GE Appliances: 800.432.2737.
Service
If the checks above do not clear it, contact GE Appliances: 800.432.2737, geappliances.com/. United States, for service (general enquiries 800.626.2000). Canada: 800.561.3344. Source: Consumer Support, p. 26
Other GDT645SYNFS problems
- Controls respond but the dishwasher never fills with water3 causes in the manual. First: the door is not completely closed.
- Water left in the bottom of the tub or not pumping out2 causes in the manual. First: the air gap is clogged, or the drain loop or air gap was not installed as the installation instructions require.
- Dishes and flatware are not clean5 causes in the manual. First: the Ultra-Fine Filter or the Fine Filter is clogged.
- Dishes don't dry3 causes in the manual. First: the inlet water is too cool.
- Spots and film on glasses and flatware3 causes in the manual. First: extremely hard water, or the rinse agent dispenser is empty.
- White film on glassware, dishes and the tubA low-quality phosphate-free detergent is the likely cause of a white film on glassware, dishware and the interior. Hard-water minerals also leave a white film on the tub interior.
- Glassware is cloudy and the cloudiness does not wash offEtching, which is permanent. It comes from soft water combined with too much detergent, or from inlet water above 150 °F.
- Suds in the tub2 causes in the manual. First: the wrong detergent was used. Detergent not made for dishwashers fills the dishwasher with suds.
- Detergent is left in the dispenser cupDishes or utensils block the detergent cup or stop its door from opening.
- Control panel lights go off while setting the controlsMore than 30 seconds passed between pad presses. The display also turns off when the door stays open for two minutes.
- Black or gray marks on dishesAluminum utensils rubbed against the dishes.
Sources
- Owner's Manual, Dishwashers GD*565-665, DD*700 and PD*715-785 Series. GE Appliances, a Haier company. Document 49-4000270, revision Rev 0, 2022-07, 78 pages, en-US. images.salsify.com (PDF). Listed on the manufacturer's support page. Retrieved 13 November 2026.
- Quick Specs, GDT645SFN/SGN/SMN/SSN/SYN Stainless Steel Interior Dishwasher with Hidden Controls. GE Appliances. Document GDT645SFN/SGN/SMN/SSN/SYN, revision Specification revised 6/20, 2020-06, 2 pages, en-US. images.salsify.com (PDF). Listed on the manufacturer's support page. Retrieved 13 November 2026.
Page numbers are the numbers printed in the manual. Where this page and the manual differ, follow the manual.