Why is My Dishwasher Not Draining?

Although it’s never a pleasant sight to open your machine and find out the machine hasn’t drained fully, don’t panic just yet. You may be able to fix the fault without having to call a plumber or invest in a new machine.

Your machine failing to empty could have a number of of causes a proportion of which can be simple to deal with. Therefore, before you call a dishwasher repair service try this list of probable things you can correct yourself. A number of which aren’t even caused by the machine itself.

Ensure the program wasn’t cut short

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

The cycle could have been cut short for multiple of reasons. Little fingers pushing controls, accidentally pressing against the controls, a power surge or opening the machine mid-program might all prevent the cycle from completing and mean your dishwasher doesn’t drain.

If you think this could be the case, or you just want to be sure it’s not the issue run the machine again on a quick program.

A number appliances might have an empty function so it’s worth checking your instructions or consulting google to check.

Inspect the garbage disposal

If you have a disposal inspect this first as an obstructed garbage disposal will prevent your dishwasher from draining. Turn on the waste disposal with fast running water to make sure there are no issues.

If you do find an obstruction drain unclogger or a plunger can be sought after to unclog the obstruction and this might deal with the fault.

Examine the sink for blockages

If you kitchen sink is draining slowly this could indicate an issue with the pipes instead of an error with your machine.

If the kitchen sink is draining reluctantly you may try putting a little bicarbonate of soda and vinegar down the drain, letting it sit for a few minutes and then washing it away with boiling water.

A plunger might also be utilized to attempt to dislodge the blockage.

This might be enough to let the appliance to empty so start a short program now. If this hasn’t sorted the issue you can remove the standing water by hand using a jug and also a sponge and have a look at the next few possible issues.

At this point make certain to disconnect the machine to stay safe.

If while you are carrying out any one of these examinations you think you may have found and repaired the issue there is no need to continue to the next step. Just start an empty cycle to ensure the dishwasher is fixed.

Inspect and scrub the filters

Corn Kernels, labels from jars, film lids and broken glass, plus food debris, may all obstruct the machine filter. Clear glass may also be difficult to spot if you don’t look closely.

Take out the filter then give it a thorough clean before replacing it. Not all filters are obvious and straightforward to remove so you may need to refer to the instruction manual for this.

Is the drain hose obstructed?

The next area to check is the waste pipe. Many things could cause a blockage including a build up of food debris, a kink in the hose, or a crushed hose. All of which could all prevent your machine from emptying.

Subject to the position of the waste hose (usually the corrugated one) you could manage view it simply by removing the base alternatively you might have to pull the dishwasher out from the wall.

Visually inspect the pipe in the first instance to see if there are any kinks or it’s been squashed. You might be able to manually fix any kinks which should fix the issue, however, it’s worth noting that when this has occurred it is much more likely to happen again so you might wish to buy a replacement hose.

If you are unable to see an issue you could remove the waste pipe from the pump and blow through it to discover any blockages. Make sure you put down newspaper or towels before you remove the hose as there could still be water in the hose.

If you are unable to blow through the waste pipe this could be the reason your dishwasher isn’t draining.

Remove the hose at the sink end and give it a good clean to clear the blockage. If you can’t get rid of the blockage or the waste hose is split or degraded purchase a brand-new one. If you may remove the blockage then put the hose back and run a short cycle to check that you have repaired the error.

You could also examine where the pipe connects to the sink. This is a common place for debris to build up so if you do remove the waste hose give this point a thorough clean as well.

Check the drain valve

You may examine the drain valve by hand to check it isn’t got stuck. The drain valve will most often be located at the base of the machine on the valve bracket. Consult your instructions if you’re unsure.

Pressing down on the valve or wiggling it a bit should be enough to find out if it’s seized. If you can see something stopping it from moving remove this. If you can’t, this might be a good time to ring a plumber unless you are happy in purchasing and repairing the component on your own.

Check your pump is not broken

Your dishwasher pump uses impellers that can get obstructed by broken glass or other debris. Check your pump isn’t broken by removing the cover and ensuring that the impellers are free to move.

Run your dishwasher and listen for any unusual sounds

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

Call a repair person

If none of the above checks has solved the error, or you suspect the pump, pump valve or motor are not working, it could be time to call for help.

At least having tried to investigate what is wrong you have managed to avoid needing to pay a big call-out charge for a clogged filter.

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