Dishwasher Not Draining and Standing in Water: 5 Easy Checks
Opening your dishwasher at the end of a wash cycle only to find a pool of murky, greasy water sitting at the bottom of the tub is a common annoyance. In 90% of instances, the issue is not an expensive broken appliance, but a localized blockage in the filtration chamber, the pump impeller, or the sink drain connection.
1. Remove and Clean the Internal Mesh Filters
Twist the cylindrical microfilter at the base of the dishwasher tub counterclockwise and lift it out along with the flat stainless steel screen.
Scrub away accumulated grease, lemon seeds, toothpicks, and food residue under hot tap water with a dish brush and dish soap.
2. Check for Obstructions in the Drain Pump Impeller
Beneath the filter housing, remove the small plastic pump cover (often secured by a Torx screw or plastic clip). Look inside the impeller chamber: shards of broken glassware, olive pits, or plastic wrappers frequently jam the spinning plastic impeller blades.
Use tweezers or gloves to remove any debris and verify the impeller spins freely.
3. Inspect the Sink Drain Siphon Spigot Connection
The ribbed drain hose from your dishwasher typically connects to an angled barb fitting on your kitchen sink's P-trap.
Disconnect the hose clamp and check the plastic spigot: grease and debris from the kitchen sink often create a solid plug right at this narrow junction.
4. Check for Kinked or Pinched Drain Hoses
If the dishwasher was recently pushed back into its cabinet cavity, the flexible corrugated drain hose may be pinched or kinked behind the appliance.
FAQ
Why does my new dishwasher fail to drain from day one?
Installers frequently forget to knock out the internal plastic knockout plug inside the new sink P-trap spigot before attaching the drain hose.
How much does a replacement dishwasher drain pump cost?
A replacement drain pump motor with installation typically costs between €80 and €140.