Filter, Racks and Drain: Keeping a GE Dishwasher Clean and Draining

What a dirty dishwasher actually looks like

Owners rarely say “my filter is clogged.” They say the glasses have a film, the tub smells like old soup, there is a shallow puddle of gray water in the bottom after the cycle, or the dishes come out with grit on them. All four describe the same thing from different angles: food and grease that the machine should have flushed out is staying behind. A dishwasher does not wash dishes with new water at every stage; it recirculates water and relies on a screen to catch food before the pump moves it on. When that screen is packed, the wash water gets dirtier and drains slower.

Cleaning the filter

Where the filter sits and how it releases depends on the model, so use the owner’s manual for the removal steps. In general terms, you open the door, pull out the lower rack, and look at the floor of the tub for a cylindrical or flat screen assembly. The manual tells you whether it twists, lifts or unclips. Here is a routine that works for most households:

1. Take out the lower rack and set it aside on a towel.
2. Remove the filter parts as the manual describes, noting how they fit so they go back the same way.
3. Rinse under warm running water. Use a soft brush or an old toothbrush on the mesh. Skip steel wool and harsh abrasives, which tear the screen.
4. Look into the opening below for broken glass, a toothpick, a seed or a label. Remove anything you can see with your fingers, carefully.
5. Wipe the tub floor, then reinstall the filter parts fully seated. A filter left slightly loose can let debris past it.

How often? A household that rinses plates little and cooks greasy food may need it every few weeks. A household that scrapes and runs a cycle daily might do it monthly. If you notice odor or grit, that is the schedule telling you it was late.

Loading habits that change the result

The spray arms spin in a circle, so anything that blocks their path leaves a dirty patch. Check that the arms turn freely by hand before you start the cycle. A tall pan or a cutting board standing on its edge is a frequent offender.

• Scrape, do not rinse to spotless. Remove solids, but leave a little residue so detergent has something to work on. Pre-washing with hot water at the sink wastes water and can leave glasses looking cloudy.
• Face dirty surfaces toward the center. Bowls tilted downward, plates facing the spray, cups upside down at an angle so they do not hold pools.
• Do not nest. Spoons stacked together touch each other and stay dirty. Mix up utensils in the basket.
• Keep the detergent cup unobstructed. A tall pot handle can keep it from opening. GE describes code C8 as the detergent cup being blocked from opening fully; remove the obstruction, close and latch the door, and wait 30 seconds. See GE Dishwasher C8.
• Keep light plastics secured. Lightweight items can flip over in the top rack and drop onto the bottom, where they block the arm.
• Run the sink faucet first. Clearing cold water from the line gives the dishwasher hotter water at the start. GE notes for code C6 that inlet water should be at least 120F and that you should run a nearby faucet first. More at GE Dishwasher C6.

Drain care: hose, air gap and disposer

If water sits in the tub after the cycle, the filter is the first suspect, but the path beyond it matters as well. GE lists code C1 for pump-out that ran longer than 2 minutes, and its owner steps are to clean the air gap, replace or reposition the hose and run the disposer; contact service if it persists. The pages for C1, C3 and FTD / F56 go through the same drain family. From the outside you can check:

• The visible drain hose under the sink: is it kinked, crushed against a cabinet wall or sagging low in a loop?
• The air gap, if one is mounted on the sink deck: a small cylinder cap that lifts off for cleaning.
• The garbage disposer, if it shares the drain: run it with water first so the dishwasher is not draining into a plugged line.

Small SF kitchens, especially older Victorian conversions and condos, often have tight cabinet bases where the hose gets squeezed behind pipes or storage bins. If you move things under the sink and then notice slow draining, look at the hose before anything else.

Reading the clues

If the symptom is a wet floor rather than a slow drain, read the water-on-the-floor article before you run another cycle.

Water, soap and rinse habits for Bay Area kitchens

San Francisco water is generally on the soft side, which means too much detergent produces residue and suds more readily than in areas with harder water. If glasses look filmy, try less detergent before blaming the machine. In parts of the East Bay and South Bay where water is harder, white scale on glassware and the tub walls is more likely; a rinse aid and an occasional cleaning cycle for the tub help. Either way, the filter routine stays the same.

Controls and models

GE dishwashers come as top-control (GDT), front-control (GDF) and pocket-handle (GDP) models, with the Profile line using PDT and PDP. The care routine above applies to all of them, though the filter layout varies. Models on this site include the GE GDT655SMJES, the GE GDF535PSRSS and the GE GDP630PGRWW. For types and prefixes, see the GE dishwashers guide.

When to stop and book

If a clean filter, a clear hose and a quick disposer run do not fix the standing water, if the same code returns, if the dishwasher leaks, or if the cycle will not start, stop running it. For code C3, which GE ties to a dishwasher that will not drain, the owner step is to cut power at the breaker for about 30 seconds, restore it and try again. If that fails, book a visit. We diagnose in your home, provide a written estimate and repair only with your approval; start from the contact page and read about the visit on the GE dishwasher repair page.

Frequently asked questions