Test this steps and fix it. God bless you
Belt, Water Pump
Although few dishwashers have a water pump
belt, if the dishwasher won't drain there might be a worn or broken
water pump belt. After removing the lower kick panel the motor can be
seen in the front, the water pump belt is on the bottom of the motor.
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Drain Pump
If the dishwasher won't drain, the drain pump
might be defective. Test the pump motor with an Ohm meter. Drain pumps
are not repairable, if it's defective it will need to be replaced.
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Drain Impeller
The drain impeller is attached to the pump
and pushes the water out of the dishwasher, through the drain tube and
into the garbage disposer or drain line. If the dishwasher won't drain,
the drain impeller might be broken or worn out. Replace both the
impeller and seal at the same time.
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Drain Solenoid Kit
If the dishwasher won't drain, the drain
solenoid kit might need to be replaced. The drain solenoid is an
actuator that opens a flap to allow the water to drain.
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Drain Valve
The drain valve can get clogged with debris
and should be cleaned out if the dishwasher won't drain. If it seems
clear of debris but won't actuate, it will need to be replaced. The
drain valve is not repairable.
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Pump and Motor Assembly
If the dishwasher won't drain, the pump and
motor assembly might be defective. If the motor runs during the drain
cycle, check for a blockage in the drain line. If the motor won't run
during the drain cycle or if it just hums when it should be running, the
pump and motor assembly might need to be replaced.
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Clogged or Improperly Installed Garbage Disposer
If the dishwasher won't drain and the garbage
disposer was installed recently, the installer might have forgotten to
knock out the drain plug from this disposer. All garbage disposers are
sold with a solid plug in the drain tube for situations where a
dishwasher isn't connected. However, if the dishwasher is connected, the
plug will need to be removed. If the disposer wasn't replaced recently,
remove the dishwasher drain hose from the disposer and clean out both
the fitting on the disposer and the end of the drain hose. These are the
most common places to find an obstruction if the dishwasher won't
drain.
Drain Hose
If the dishwasher won't drain the drain hose
might be clogged. Remove the drain hose from both the dishwasher and the
sink drain to clean it out. The most common place for an obstruction is
at the garbage disposer.
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Check Valve
If the dishwasher won't drain the check valve
might be stuck closed. The check valve is a device which prevents water
from returning to the dishwasher after it has drained. If the valve
gets stuck closed, it will prevent the water from draining. The check
valve is located in or at the outlet of the pump that the drain hose
attaches to. Sometimes the check valve is accessed from the inside of
the unit depending on the model.
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Check Ball
If the dishwasher won't drain the check ball
might be stuck. The check ball is a small plastic ball in the check
valve which prevents water from returning to the dishwasher after it has
drained. If the ball gets stuck, it will prevent the water from
draining also. The check valve is the device that the drain hose is
attached to on the dishwasher.
Testimonial: "Thanks Ernesto, The pump and motor assembly are all correct and work when it's activeted manually(i.e. without the unit control). All the mecanism is clean(verified). It seems that when the draining cycle is executed, the draining pump is not activated. "
I have this exact same problem, did you find the fault?
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SOURCE: Dishwasher does not start.
remove kick plate from below the door. youll see a white tray behind the kick plate there is water in the tray activating a over flow switch. using a towel remove the water. this will solve the problem
SOURCE: Bosch SHU9915 Does Not Drain
faulty controls..the signals are apparently getting there, but the machine is intepreting them oddly..may need a new control board behind panel
SOURCE: Not starting wash cycle
Typically this means that there has been a water leak of some sort and there is water in the lower base pan. This is the large white plastic base that the dishwasher sits on.
If you remove the toe kick and look back past the fill valve on the extreme left side of the dishwasher about 6 to 8 inches from the front you will see a red stick that goes straight up and down. This is a mechanical linkage that activates the drain feature. Be careful as there are live connections here.
This stick rests on a round piece of Styrofoam that acts as a float. If there is water present it will cause the stick to lift and the dishwasher will go into drain. The source of the leak will have to be isolated and corrected. Most likely it is the fill float assembly as referenced at the end of this post.
If the stick is not in the upright position then there is possibly an issue with the switch mechanism itself.
You will have to pull the dishwasher out from beneath the cabinet and remove the panel covering the left hand side. If it is a full panel then there are a couple of screws holding it on from the front through side trim as viewed when the door is open if it is a half panel then it can be removed by removing the large torx screw on the lower right as seen when facing the panel.
If there is a problem with the switch then the entire mechanism should be replaced.
Try the following link to a picture for reference. It is upside down as compared to the installed one:
http://www.repairclinic.com/SmartSearch/SSPartDetail.aspx?PartID=935595&PPStack=1
SOURCE: Pump Runs On After Water Is All Drained Out?
If the cycle does not stop draining that is usually because of a faulty
water level switch that controls the water level in your appliance.
The faulty sensor cause the machine to think that there is still water inside, even when water has drained completely.
Check if the floating sensor is stuck or faulty.
Some machine may use a membrane switch instead of a floater.
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"Thanks Ernesto, The pump and motor assembly are all correct and work when it's activeted manually(i.e. without the unit control). All the mecanism is clean(verified). It seems that when the draining cycle is executed, the draining pump is not activated. "
Exact same problem here. Found any solution apart from replacing dishwasher??
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