How to unblock a dishwasher drain pump when water won't drain

If your dishwasher leaves standing water in the bottom, the drain pump is often blocked by food or debris. This guide shows you how to switch off the power, reach the pump area and clear the blockage yourself. It suits any beginner with basic hand tools.

Dishwasher not draining? It could be this easy fix. How to unblock your dishwasher. #diy #tutorial, by Fix It With Fraz on YouTube. 2 min 50 s.

Video length
2 min 50 s
Time to do it
30 minutes
Difficulty
Easy
Steps
9

What you need

Steps

  1. Switch off the dishwasher at the wall and pull the plug. Turn off the water supply tap if one feeds the machine.

  2. Open the door and scoop out the standing water with a cup or sponge. Soak it up with towels so the floor stays dry.

  3. Pull out the bottom basket and remove the spray arm if it lifts off. Take out the filter and mesh, then rinse them under the tap.

  4. Check the filter housing and sump for food, glass or labels. Clear any debris with your fingers or a soft brush.

  5. Look for the pump cover or sump access under the filter. Unscrew or unclip it and lift it out.

  6. Reach into the pump chamber and pull out any blockage. Spin the impeller with a finger to check it turns freely.

  7. Refit the pump cover, filter and spray arm. Make sure everything clicks or screws back firmly.

  8. Check the drain hose where it connects to the sink or waste pipe. Look for kinks and clear any blockage.

  9. Restore power and water, then run a short hot cycle. Watch the drain point for leaks and check the water empties.

Tips and common mistakes

Always cut the power before reaching into the pump area, since water and electricity are a dangerous mix.

Wear gloves and keep broken glass out of the sump, as sharp pieces often cause the blockage.

Run a hot cycle with a dishwasher cleaner every few months to stop grease and food building up.

If water still sits after clearing the pump, the drain hose or the pump itself may need replacing.

Questions

Why is there water left in the bottom of my dishwasher?

Usually the drain pump or filter is blocked by food and grease, so water cannot be pushed out. A kinked or clogged drain hose can cause the same problem.

Can I do this fix without taking the dishwasher out?

Yes. On most models the pump cover and filter are reachable from inside the machine once you remove the bottom basket and spray arm.

When should I call a repairer?

Call a technician if the impeller will not turn, the pump makes a loud noise, or water still will not drain after you clear the filter and hose.

This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.

More in Home & DIY

See all