The dishwasher is one of the most-used and most-missed when broken kitchen appliances. Therefore, if your dishwasher is not draining, you will want to fix the issue as soon as possible. Fortunately, with our guide to help you, you should be able to diagnose and fix the issue yourself.
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Symptom: Dishwasher partially draining (possibly making strange noise)
Likely Cause: Clogged filter, garbage disposal, or sump area; obstruction in the drain hose or around the pump’s impeller
Symptom: Dishwasher not draining at all
Likely Cause: Defective drain pump, drain solenoid valve, or check valve; or garbage dispenser knockout plug not removed
Most KitchenAid dishwashers have a filter to catch large food chunks or foreign items like broken glass. If the filter is clogged, the dishwasher will struggle to drain.
Depending on your model, the dishwasher’s filter may be easy to locate and check or require the removal of the lower spray arm and a sump cover.
Follow these steps to check the filter:
Depending on the model, accessing the sump area may require the removal of a screen filter and various other panels and covers. The spray arm assembly may also need to be removed.
Follow these steps to clean out the sump area:
If your dishwasher drain hose is connected to a garbage disposal, a blockage in the disposal could be causing the dishwasher not to drain. Also, if the dishwasher or garbage disposal was recently installed, the garbage disposal knockout plug may not have been removed, which prevents the dishwasher from draining.
Follow these steps to check the garbage disposal:
A check valve is designed to open when the dishwasher is draining and close after draining to prevent the discarded water from flowing back into the dishwasher.
Depending on the model, the dishwasher might not have a check valve, but most do. The location of the check valve can also vary.
If your model has a check valve in the tub, usually under a check valve cover, make sure it can open and close. If the valve is causing the drainage issue, replace it.
If the check valve is not accessible from the tub/sump area, it will likely be located where the drain hose connects to the drain pump.
If your KitchenAid dishwasher isn’t draining, a clogged or incorrectly installed drain hose may be causing the issue.
The drain hose must be installed according to the manufacturer’s specifications, usually with a loop at the end of the drain hose at least 20 inches above the floor.
The easiest part of the drain hose to check is the end that connects to the drainpipe underneath the sink. If you disconnect the hose and find a blockage, you can remove the debris. However, checking the rest of the drain hose will likely require moving the dishwasher and putting it on its back.
In some cases, you may be able to check and remove obstructions by removing the lower kickplate on the front of the dishwasher.
Follow these steps to check the drain hose:
If checking for the above issues has failed to find the problem, the drain pump’s impeller may be obstructed, or the pump may need to be replaced.
As with accessing the drain hose, you may be able to access the drain pump by removing the kickplate, but most likely, the dishwasher will need to be put on its back.
Follow these steps to check the drain pump:
Some Kitchenaid dishwashers have a drain solenoid valve that opens to allow water to exit the dishwasher. If your model has a drain solenoid valve, it can be tested with a multimeter for continuity to determine if it has failed and needs to be replaced.
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