Why is My Dishwasher Not Draining?

Although it’s always annoying to open the dishwasher and find out it hasn’t drained properly, don’t lose it just yet. You may be able to deal with the problem before you have to call a plumber or invest in a new dishwasher.

Standing water in your dishwasher may have a number of of causes a few of which can be easy to fix. So, before you call a dishwasher repair service try this selection of possible issues you can troubleshoot on your own. Some of which aren’t even related to the dishwasher itself.

Ensure the program wasn’t stopped mid-way

If you’re fortunate the fact your dishwasher hasn’t drained may not be an issue at all. Alternatively, the cycle may have been stopped mid-way.

The program might have been stopped mid-way for a number of of reasons. Little fingers pushing buttons, mistakenly pushing on the buttons, a power cut or opening the machine mid-cycle could all stop the program from completing and mean your machine 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 short cycle.

A number machines could have an empty capacity so it’s well worth checking your manual or doing a quick internet search to make sure.

Inspect the waste disposal

If you have a garbage disposal inspect this before you do anything else as an obstructed disposal will prevent the dishwasher from draining. Turn on the disposal with lots of water to check there are no obstructions.

If you do discover an issue drain un-blocker or a plunger could be used to remove the blockage and so this could rectify the fault.

Inspect the sink waste for clogs

If you kitchen sink is draining inefficiently this may signify a plumbing issue rather than an error with your machine.

If the kitchen sink is emptying reluctantly you can try putting a little bicarbonate of soda and vinegar down the plughole, letting it sit for a few minutes, then rinsing it through with hot water.

A plunger may also be utilized to attempt to shift the blockage.

This may be all you need to do to let your machine to drain so start a quick program now. If this hasn’t solved the problem you could remove the dirty water by hand using a cup and also a towel and troubleshoot the next few possible issues.

Make certain to disconnect the machine to prevent electrocution.

If in the process of one of these examinations you believe you have found and fixed the error there is no need to continue to the next issue. Just run an empty cycle to check your dishwasher is once again emptying as it should.

Inspect and wash the filters

Any number of things could block the filters including corn kernels, labels from tupperware, plastic lids and broken glass. Clear plastic lids can also be hard to spot if you don’t look closely.

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

Is the waste pipe obstructed?

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

Depending on the location of the hose (normally the corrugated one) you might have the means to view it by means of removing the kick board or you could be required to pull the dishwasher away from the wall.

Look at the pipe in the first instance to see if it has been crushed or kinked. You might have the means to fix these issues by hand which is likely to deal with the issue, however, be aware that once this has happened it is much more inclined to happen again so you might need to purchase a replacement hose.

If you can’t see any obvious kinks or obstructions you can disconnect the drain hose from the dishwasher and blow into it to figure out if there are any blockages. Make sure you put down newspaper or towels before you remove the hose as even if you have emptied the machine there may still be waste water in the pipe.

If you can’t blow through the waste pipe this may be the reason your dishwasher isn’t draining.

Remove the other end of the hose and then give it a good clean to get rid of the obstruction. If you can’t shift the obstruction or the pipe is slit or worn purchase a brand-new one. If you could clear the obstruction then re-attach the hose and start a short cycle to double check that you have repaired the error.

You could also inspect the point where the pipe connects under your sink. This is a common place for a build-up of gunk so if you happen to remove the pipe give this connection a good clean as well.

Examine the drain valve

You could examine the drain valve by hand to ensure it hasn’t got stuck. The drain valve will usually be situated at the base of the machine on the valve bracket. Check your owners manual if you can’t see it.

Depressing the valve or giving it a jiggle should be adequate to find out if it’s seized. If you can see anything blocking it remove this. If you are unable to, this could be when you should ring a repair person unless you are undaunted by procuring and replacing the part yourself.

Check your pump is not blocked

Your appliance pump uses impellers that can become blocked by broken glass or other debris. Check your pump isn’t blocked by taking off the cover and making sure the impellers are free to move.

Listen to your dishwasher while it’s on

If it doesn’t sound normal your dishwasher pump or motor could be broken and need replacing.

Call a repair person

If none of the above investigations has fixed the issue, or you have reason to believe the pump, pump valve or motor are not working, it might be time to call for help.

At least having done your best to fix the problem yourself you have prevented having to pay a hefty repair charge for a blocked hose.

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