Why is My Dishwasher Not Draining?

No-one wishes to open their machine and discover standing water but, try not to panic just yet. You could be able to fix the error by yourself, without having to call a repair person or acquire a brand-new dishwasher.

Your dishwasher declining to empty may be caused by multiple things some of which are straightforward to figure out. So, before you call a dishwasher repair service here is a lineup of potential things you could identify on your own. A number of which aren’t even a fault of the dishwasher itself.

Check the program wasn’t interrupted

If you’re lucky the fact your dishwasher hasn’t drained may not be a problem at all. Rather, the cycle may have been stopped mid-way.

The cycle might have been cut short for any number of of reasons. Kids pushing controls, accidentally pushing against the controls, a power surge or opening the machine mid-cycle may all stop the program from completing and mean your dishwasher doesn’t empty.

If you believe this may be the case, or you just want to be sure it’s not the issue run the dishwasher again on a short program.

A few appliances could have a drain program meaning it’s well worth consulting your manual or consulting google to check.

Inspect the waste disposal

If your dishwasher is attached to the disposal inspect this before you do anything else as an obstructed waste disposal will prevent the machine from emptying. Run the disposal with fast running water to make sure there are no obstructions.

If you do uncover an obstruction drain cleaner or a plunger can be employed to remove the obstruction and so this could deal with the problem.

Examine the sink for clogs

If you sink is emptying slowly this could signify an issue with the plumbing as opposed to an issue with your dishwasher.

In the case that the sink is draining reluctantly you may attempt putting some bicarb and white vinegar down the plughole, leaving it for a while and then flushing it away with boiling water.

A sink plunger might also be employed to try and shift the blockage.

This might be sufficient to allow the appliance to empty so start a short rinse and drain cycle now. If not you can manually drain the dishwasher using a bowl as well as a sponge and troubleshoot a few more possible issues.

At this point make sure you disconnect the dishwasher to prevent electrocution.

If during any one of these checks you suspect you may have discovered and solved the error there is no need to continue to the next issue. Just complete an empty program to ensure your dishwasher is fixed.

Examine and rinse the filters

Popcorn, paper from food jars, film covers and broken glass, as well as food debris, may all obstruct the machine filter. Clear film can also be difficult to spot if you aren’t looking for it.

Take out the filter then give it a thorough wash before putting it back in place. Not all filters are obvious and simple to remove so you may need to consult the manual for this.

Is the waste water hose obstructed?

The next place to examine is the waste hose. Stuck food, a kink in the hose or a crushed hose could all stop your machine from draining.

Subject to the location of the hose (generally the ribbed one) you might manage inspect it by lifting away the kick plate or you might have to move the dishwasher out from under the counter.

Visually examine the hose in the first instance to see if there are any kinks or it’s been squashed. You may be able to manually straighten out any kinks which will most likely rectify the issue, but it’s worth noting that once this has happened the chance of it occurring again is greatly increased so you could wish to purchase a spare hose.

If you are unable to find an issue you can disconnect the waste hose 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 may still be water in the hose.

If you can’t blow air through the waste pipe this could be the issue.

Remove the other end of the hose and then give it a thorough clean to clear the blockage. If you can’t remove the blockage or the hose is slit or damaged invest in a brand-new one. If you could get rid of the obstruction then replace the hose and run a quick cycle to make sure you have repaired the fault.

You could also examine where the waste hose attaches under your sink as well. This is a typical spot for debris to build up so if you do take off the hose give this area a good scrub as well.

Check the drain valve

You can manually examine the drain valve to check it hasn’t stopped working. The drain valve will often be located at the base of the machine on the valve bracket. Examine your manual if you’re unsure.

Depressing the valve or giving it a jiggle should be enough to tell you if it’s stuck. If you can see something blocking it carefully extract this. If you can’t, this might be when you should get in touch with a repair person unless you are confident in procuring and replacing the valve on your own.

Check your pump is not blocked

Your water pump makes use of impellers that may get obstructed by pieces of china or other objects. Check your impellers aren’t blocked by removing the cover and making sure the impellers can rotate freely.

Listen to your dishwasher while it’s on

If the dishwasher sounds unusual your pump or motor may be damaged and need replacing.

Call a plumber

If none of the above investigations has solved the error, or you suspect the pump, pump valve or motor are damaged, it might be a good time to call for help.

This way though you will at least be able to give them more information and have managed to avoid having 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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