Appliances

Why Is My Dishwasher Not Draining? 7 Things to Check

A small amount of water in the sump area beneath the filter can be normal on some models. Water covering the tub floor after a completed cycle is more concerning. Start by checking the kitchen drain and the parts described in your owner's manual.

Safety first: Turn the dishwasher off before inspecting it and disconnect power at the breaker or unplug it before removing parts, if safe and accessible. Standing water may contain sharp glass. Never put your hand into a pump opening, bypass a safety switch, or use chemical drain cleaner in the dishwasher.

1. Check whether the kitchen sink drains normally

Many dishwashers drain into the kitchen sink plumbing. If the sink is also slow or backed up, the restriction may be in the shared drain or disposal connection. If the sink drains normally, continue with appliance checks.

2. Clean the dishwasher filter

Food particles and grease can restrict water flow. Remove the filter only as described in the owner's manual, rinse it, and reinstall it securely. Filter designs vary, so do not force a part that will not release.

3. Look for visible debris around the drain

With the appliance off and power disconnected, remove only loose debris that is plainly visible and safely reachable. Wear suitable protective gloves and use a tool rather than reaching blindly into the drain area. Do not remove pump covers unless the manual identifies them as homeowner-serviceable.

4. Inspect the drain hose under the sink

Look for a kink, crushing, loose connection, or visible leak. The hose must be routed in the high-loop or air-gap arrangement required by the appliance instructions and local plumbing rules. Do not disconnect a hose while the machine contains water unless you know how to contain and drain it safely.

5. Check the air gap or garbage-disposal connection

If your sink has a countertop air gap, check for visible debris and clean it only according to its instructions. If the dishwasher drains through a garbage disposal, inspect the visible connection for leaks or a loose hose. A newly installed disposal can prevent dishwasher drainage if its dishwasher inlet knockout plug was not removed during installation; that repair may require a qualified installer.

6. Note what happens during a drain cycle

Use only the normal controls and observe from a safe distance. A humming pump with little water movement can indicate a blockage or pump fault. No pump sound may point to a power, door-latch, control, or pump issue. Sounds alone do not confirm which component has failed.

7. Stop if the problem persists or water is leaking

Arrange appliance service if cleaning the filter and checking visible hose routing do not solve the problem, the pump may be damaged, a breaker trips, wiring is involved, or water reaches flooring or cabinets. Do not keep running repeated cycles to force a drain.

Why is there still water at the bottom?

Check your manual for the model's normal sump-water level. A shallow pool below the filter may be intentional; water spread across the tub floor after the cycle, standing water that smells foul, or water that rises when the sink drains deserves further investigation.

Quick checklist

Determine whether the kitchen sink is also slow.
Turn the appliance off and follow the manual before inspecting.
Clean and correctly reseat the filter.
Remove only safely accessible, visible debris.
Check the drain hose for kinks, leaks, and correct routing.
Inspect an air gap or disposal connection if fitted.
Use a technician for pump, wiring, repeated drainage, or leak problems.