A dishwasher that won't drain, is an annoying problem, simply because every time you open it, you find that a large amount of water is left behind at its bottom. Many of you must have faced this situation. You feel helpless as you have no clue why it is happening. You often defer such repair work of kitchen appliances on your own, in the fear that the situation may worsen further. However, actually, it is not so much of a major issue in most cases.
In this section, we are trying to figure out all the possible causes behind the problem. We are also providing you with some solution to fix each one of those problems:
Cause #1: The most common cause is clogging of the household drain under the kitchen sink. Observe the dishwasher carefully while it is draining. If you find that water bubbles are coming up into the sink, then it is likely that the problem lies in the drain pipe, and not the machine. Detach the pipe from the kitchen sink, and clear out all the debris that are causing the clogging and reattach it. Also, check the pipe that connects the dishwasher and the sink, and remove any trash that is left.
Cause #2: If the door latch of the dishwasher is not working properly, then the door cannot be closed, and it won't drain the water properly. Check if the latch has become loose, or gone out of alignment. In such cases, tightening the bolts of the latch will fix the problem.
Cause #3: Accumulation of food particles in the dishwasher basket can prevent the water from flowing out of the drain. In that case, you have to disassemble the basket, and clean all its parts thoroughly to get rid of the gunk matter. Then reassemble the basket and you will find the drain is cleared. You can do this repair work on your own if you have some knowledge about the dishwasher parts. Take the help of the user manual provided by the manufacturer, to find out the right technique to open the basket of the specific model that you have.
Cause #4: A new garbage disposal device can be responsible for this kind of trouble. This will happen if you have recently installed a garbage disposal, and have not removed the knock out plug from it. Once you remove the plug, it will ensure that the water from the dishwasher goes directly into the disposal. A clogged garbage disposal can also trigger this type of trouble. Running the garbage disposal with plenty of hot water can clear such obstructions.
Other Causes: In case all the above mentioned techniques fail to show desired results, then the defect could be something more serious, and related to some of the other parts of the dishwasher. Problems may be related to the drain valve, timer, belt, pump, or motor, and may require replacement with a new one. The part to be replaced has to be chosen very carefully, and it should be right for the specific model that you have. It is better if you do not try to fix such things on your own, and consult a repair professional who has the skills to handle these problems more effectively. You may even land up in trouble with the warranty of the appliance, if you install any wrong part in your model.
After the troubleshooting, run some hot water thought the garbage disposal to clear any residue of dirt and grease from the pipes. Then start running the dishwasher. You can prevent such problems in future by running some vinegar through the appliance once or twice a month. If you live in an area where you get hard water, then clean the sink drain with a cleaner to keep it free from mineral deposits.