Dishwasher not draining? Find out which problem you have.

First, is it a small amount or a tub of water?

Some dishwasher designs retain a small amount of water in an internal sump. Water above the filter or pooled across the bottom after a completed cycle is a more useful symptom to record. Check the owner’s manual for what is normal on your model.

Next, inspect the parts intended for routine cleaning

With the machine off and cool, follow the manufacturer’s instructions for the removable filter. Remove visible food debris only from areas the manual identifies as user-serviceable. Do not reach into hidden pump openings or remove electrical panels.

Check the sink, disposal and air gap

A dishwasher may share drainage infrastructure with the kitchen sink. If the sink also drains slowly, note that when asking for service. Where installed, a countertop air gap can also be relevant. Plumbing configurations differ by home, so a photo can help a qualified professional understand the setup.

When not to run another cycle

Stop if there is an active leak, an electrical smell, water around a receptacle, or flooding. Repeating cycles can make water damage worse. A blocked drain hose, faulty pump, control issue, and external plumbing problem each require a different response.

What to ask before approving a repair

Ask whether the quote includes clearing external plumbing obstructions, testing the drain pump, and replacing any faulty component. An appliance technician may not perform general plumbing repairs, so confirm the scope and fee in advance.

A Littleton-specific detail worth checking

Cloudy dishes and standing water are different problems. Denver Water describes its supply as soft to moderately hard. If your address is within its service area and the concern is film rather than retained water, check water-quality and detergent guidance before assuming the dishwasher has failed.

Reference: Denver Water: Water hardness ↗