Why is My Dishwasher Not Draining?

Although it’s never a welcome sight to open your machine and realize it is still full of water, don’t lose it just yet. You might have the means to fix the issue by yourself, without having to call a repair person or acquire a brand-new dishwasher.

Standing water in your dishwasher could be induced by a number of components a proportion of which are straightforward to rectify. So, in advance of calling a dishwasher repair service here is a selection of potential components you can troubleshoot by yourself. A few of which aren’t even caused by the dishwasher itself.

Check the dishwasher wasn’t stopped mid-cycle

It is probable that there is nothing stopping your dishwasher from emptying. Alternatively, the program could have been stopped mid-way.

The cycle could have been cut short for multiple of reasons. Children pressing buttons, inadvertently pressing on the buttons, a power surge or opening the machine mid-cycle might all prevent the cycle from completing and mean your dishwasher doesn’t empty.

If you think this could be the case, or you feel it might be worthwhile checking run the dishwasher again on a short program.

A number appliances may have a drain function meaning it’s worth consulting your manual or checking online to make sure.

Inspect the disposal

If you have a waste disposal inspect this first as a blocked disposal will prevent your dishwasher from emptying. Turn on the waste disposal using plenty of water to make sure there are no obstructions.

If you do find an issue drain un-blocker or a natural alternative may be employed to clear the obstruction and this may fix the problem.

Check the sink for blockages

If you sink is emptying reluctantly this could indicate a plumbing issue as opposed to an error with your dishwasher.

If the kitchen sink is emptying slowly you can attempt putting a little bicarb and vinegar down the plughole, letting it sit for a while, then rinsing it through with hot water.

A plunger could also be utilized to try and remove the obstruction.

This may be enough to allow the dishwasher to drain so start a short cycle at this point. If this hasn’t solved the problem you could manually empty the dishwasher using a bowl and a sponge and troubleshoot a few more areas.

Make sure you disconnect the machine to avoid electrocution.

If in the process of any of these examinations you suspect you may have detected and solved the fault there is no need to continue to the next issue. Just start an empty program to ensure your machine is fixed.

Inspect and scrub the filters

Any number of things could block the filters including popcorn, paper from food jars, plastic film covers and smashed glass. Clear film may also be hard to see if you don’t look closely.

Remove the filter and give it a good clean before replacing it. Not all machines have their filter in the same location so you may need to refer to the instruction manual for this.

Is the waste pipe obstructed?

The next area to examine is the waste water pipe. Stuck food, a kink in the hose or a crushed hose may all stop your machine from emptying.

Contingent upon the location of the hose (normally the corrugated one) you might have the means to look at it by lifting away the kick plate or you might have to move the dishwasher out from the wall.

Have a look at the hose in the first instance to find out if it has been crushed or kinked. You could be able to manually remove any kinks which is likely to resolve the issue, however, be aware that once this has occurred the chance of it occurring again is massively increased so you might wish to order a replacement hose.

If you are unable to see anything you could remove the drain pipe from the dishwasher and blow through it to discover any blockages. Make sure you line the floor with newspaper or towels first as even if you have emptied the machine there could still be dirty water in the hose.

If you are unable to blow air through the pipe this may be the problem.

Remove the other end of the hose in order to give it a thorough clean to get rid of the blockage. If you can’t get rid of the blockage or the pipe is cracked or worn purchase a new one. If you can get rid of the obstruction then put the hose back and start a quick program to check that you have fixed the problem.

You may also check the point where the waste hose connects to the sink. This is a likely place for blockages to occur so if you do take off the waste hose give this area a good scrub as well.

Examine the drain valve

You can manually examine the drain valve to ensure it isn’t got stuck. The drain valve will often be found in the bottom of the dishwasher on the valve bracket. Consult your owners manual if you’re not sure.

Depressing the valve or wiggling it a bit will likely be sufficient to tell you if it’s seized. If you can see something stopping it from moving carefully extract this. If you are unable to, this may be the right time to ring a plumber unless you are undaunted by ordering and replacing the valve on your own.

Check your pump is not broken

Your water pump makes use of impellers that may become blocked by broken china or other objects. Check your pump isn’t blocked by taking off the cover and making sure the impellers can be easily rotated.

Run your dishwasher and listen for any unusual noises

If your dishwasher doesn’t sound right your dishwasher pump or motor could be faulty and need replacing.

Call a plumber

If you have been through the above list and the problem remains, or you suspect the pump, pump valve or motor are not working, it could be the moment you need to get the professionals.

This way though you will at least have the means to give them more information and have managed to avoid needing to pay a big call-out fee for a blocked hose.

More Dishwasher Problems:

  • Dishwasher Being Loud
  • Dishwasher Not Turning On
  • Dishwasher Leaking
  • Dishwasher Not Drying
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