Why is My Dishwasher Not Draining?

No-one wishes to open their dishwasher and discover it hasn’t emptied fully but, try not to overreact just yet. You could have the means to figure out the issue before you have to call a plumber or acquire a brand-new dishwasher.

Standing water in your machine can have multiple of causes some of which can be straightforward to fix. Therefore, before you call a dishwasher repair service here is a list of possible things you may troubleshoot yourself. A few of which are not even a fault of the machine itself.

Ensure the dishwasher wasn’t interrupted mid-program

It is possible that there is nothing stopping your machine from draining. Rather, the program could have been stopped mid-way.

The program could have been stopped mid-way for a number of of reasons. Little fingers pressing controls, accidentally pushing on the buttons, a power outage or opening the dishwasher mid-program could all prevent the program from completing and mean your machine doesn’t empty.

If you think this could be the circumstance, or you think it may be worthwhile checking run your dishwasher again on a short program.

Some dishwashers might have a drain capacity meaning it’s well worth consulting your instructions or checking online to check.

Check the garbage disposal

If your dishwasher is attached to a waste disposal check this before you move on as an obstructed disposal will stop your machine from draining. Run the garbage disposal with plenty of water to check there are no blockages.

If you do discover a blockage drain cleaner or a natural alternative could be used to remove the blockage and so this could fix the error.

Inspect the sink for blockages

If you sink is emptying slowly this may indicate a plumbing issue as opposed to a problem with your machine.

If the kitchen sink is draining slowly you may attempt putting a little bicarb and white vinegar down the drain, letting it sit for a few minutes and then flushing it through with hot water.

A sink plunger could also be utilized to try and shift the blockage.

This may be all you need to do to let your appliance to work again so start a short cycle at this point. If not you may remove the dirty water by hand using a bowl and also a sponge and check a few more likely causes.

At this point make sure you turn off the dishwasher to stay safe.

If during any one of these investigations you think you have found and repaired the error there is no need to continue to the next issue. Just start an empty program to check the dishwasher is once again emptying as it should.

Inspect and rinse the filters

Popcorn, labels from food jars, film covers and broken glass, as well as scraps of food, could all block the machine filter. Clear film may also be hard to see if you don’t look closely.

Remove the filter and give it a thorough wash before replacing it. Not all dishwashers have their filter in the same place so you might need to refer to the instruction manual for this.

Is the waste hose obstructed?

The next component to examine is the waste pipe. Stuck food, a kink in the hose or a crushed hose can all stop your dishwasher from draining.

Contingent upon the location of the hose (generally the corrugated one) you might manage view it by taking off the kick board or you might be required to pull the dishwasher away from under the counter.

Look at the pipe in the first instance to discover if there are any kinks or it’s been squashed. You may be able to fix these issues by hand which should deal with the issue, however, be aware that when this has occurred the chance of it occurring again is massively increased so you could need to purchase a replacement hose.

If you can’t see any obvious kinks or obstructions you may take off the waste hose from the pump and blow into it to check for any blockages. Make sure you line the floor with newspaper or towels first as there could still be dirty water in the pipe.

If you are unable to blow air through the waste pipe this might be the issue.

Disconnect the hose at the sink end and then give it a good clean to clear the blockage. If you can’t remove the blockage or the hose is split or damaged invest in a new one. If you could clear the blockage then replace the hose and start a quick cycle to find out if you have repaired the fault.

You may also examine the point where the waste pipe attaches to the sink as well. This is a common point for a build-up of gunk so if you happen to take off the pipe give this connection a thorough clean as well.

Inspect the drain valve

You could examine the drain valve by hand to ensure it hasn’t seized. The drain valve will usually be located at the base of the dishwasher on the valve bracket. Consult your owners manual if you can’t see it.

Pushing down on the valve or giving it a jiggle will likely be enough to find out if it’s stuck. If you are able to see something blocking it get rid of this. If you are unable to, this may be a good time to get in touch with a plumber unless you are undaunted by procuring and replacing the part yourself.

Check your pump is not broken

Your dishwasher pump makes use of impellers that could become blocked by broken glass or other objects. Check your impellers aren’t broken by taking off the safety cover and ensuring that the impellers can be easily rotated.

Listen to your dishwasher while it’s running

If your dishwasher sounds unusual your pump or motor may be faulty and need to be repaired.

Call a repair person

If you have been through the above list and the problem remains, or you suspect the pump, pump valve or motor are damaged, it may be time to get the professionals.

At least having done your best to troubleshoot you have managed to avoid needing to pay a hefty repair charge for a blocked drain.

More Dishwasher Problems:

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