If you have opened your dishwasher and found it full of water, the very first thing you should check is if the drain is clogged. Obviously, when a drain is clogged, it completely halts the function of your dishwasher, but many still don’t actually know what to do about it.
Before beginning you need to take proper safety precautions and disconnect the electricity to your dishwasher and, if applicable, your garbage disposal. Now you will need to open your cabinets and locate the drain line that connects your dishwasher either to the sink drain or your garbage disposal.
You will then want to remove the hose from the sink drain. You will most definitely want to have a rather large container on hand to catch some water. The water might not flow right away, but you still want it handy.
Once the hose is disconnected, you will want a drain snake or a straightened coat hanger to insert into the hose. If there is a clog in the actual hose, this will break it loose. This is when you will want that water catching container on hand.
If the clog is not in the actual hose, you will want to reconnect it and investigate the dishwasher’s inner drain. You will want to remove the bottom spray arm and check the filter underneath. If that checks out, then you will want to move onto the pump itself that is located under the filter. There will be a lot of water in the bottom of the tub when checking these things. However, that will help you know when you have dislodged the clog as all the water will flow out.
Once you do have the clog located and removed, you will want to pour in some warm water to ensure that it is thoroughly flushed away.