Any dishwasher that you buy is going to run the risk of not draining the water out of the machine when the cycle is done. It is a common issue for people to encounter, but it is an issue that is easily dealt with or to call for dishwasher repair.
There are only a certain number of things that are going to cause this to happen and here is a simple troubleshooting list for you to follow in order to get the problem resolved.
CHECK FOR CLOGS
You will start in the lower area of the machine, also known as the sump area. There should, realistically, only be a cup or two of water in this area. If there is more than that, you are going to want to remove as much of the water as you can and check for anything that may be clogging the drain. Things like paper and food debris may be clogging the drain, which will not allow the water to empty from the machine. A small amount of water there is normal, and it should be there (it keeps the seals in the drain from being coming too dry and cracking).
CHECK THE DOOR LATCH
The door latch actually activates the machine to start the cycle. If the door latch isn’t latching all the way, you may need to replace this part, and this could be the reason for the problem.
CHECK OPERATING COMPONENTS
For this step, your owner’s manual will come in very handy in aiding you to identify and locate all of the various components that you are going to need to look at. Your dishwasher may have a drive belt and it is possible that this belt may have snapped or slipped off. Also, you will want to check the pump, motor, solenoid assembly, drain valve, air gap, and drain line.
CHECK THE GARBAGE DISPOSAL DRAIN PLUG
Some dishwashers drain through the garbage disposal. For those machines that do, you are going to want to make sure that there is nothing clogging the garbage disposal. You can also run the disposal for a few seconds to make sure that it is clear of any blockages so that the dishwasher is able to drain.
CHECK FOR BLOCKAGE IN THE DRAIN HOSE
There is a drain hose that is located between the pump and the drain line. It is held on with clamps and these will need to be removed and the hose will need to be removed as well. It is possible that this hose may be blocked or even kinked in some way. If it is broken, simply replace the hose.
CHECK FOR MOTOR FUNCTION
If the dishwasher is making a sort of humming noise, it is likely that the motor is getting power, trying to work, but just not functioning properly. If this is the case, the motor will need to be replaced.
CHECK THAT THE DRAIN VALVE WORKS
This is a part that not all dishwashers have, but if yours does it will need to be checked. This drain valve is open by a solenoid that lets the water drain out. If this solenoid is not properly opening, you are going to need to put in a new one.