Dishwasher not draining: fixes to try (in order)

Standing water is usually a clog or a blocked drain path—not a “broken dishwasher.” Work top‑down and you’ll usually find it.

Safety first

• If there’s water near outlets, turn off power to the dishwasher at the breaker.
• If you’re not comfortable removing panels, stop early and call an appliance tech.

1) Cancel/Drain and run the garbage disposal

If your dishwasher drains into the disposal, a partially clogged disposal can back up the dishwasher.

2) Check the filter (most common)

Many dishwashers have a twist‑out filter at the bottom. Clean it and re-seat it.

3) Check the drain hose for kinks

Look under the sink and behind the unit (if accessible). A sharp bend can stop draining.

4) Clear the air gap (if you have one)

If there’s a small cap near the faucet (air gap), pop the cap and clean out debris.

5) Clear the sink drain / P‑trap

A slow kitchen sink drain can make the dishwasher drain poorly.

6) Check the drain hose connection

Under the sink, disconnect the hose (put a towel/bucket down) and see if it’s clogged.

7) Listen for the drain pump

If you hear a strong hum but no flow, the impeller path may be blocked. If it’s silent, it could be electrical/control.

8) “High loop” the drain hose

The hose should loop up high under the counter before going down to the drain/disposal to prevent backflow.

9) When to call a pro

Call if:

• The unit trips the breaker
• You see leaks under the unit
• It won’t drain after filter + hose + drain checks