Hi,
In
most dishwashers, the water pump is located under the lower sprayer
arm. This component pumps the water through the dishwasher. The pump
has two impellers, top and bottom. These, as well as other components,
can become clogged with food or detergent. Here's how to disassemble
the pump:
Step 1: Remove the cap that holds the sprayer arm on.
Step 2:
Remove the sprayer arm, the screen, the pump housing, a bolt, the upper
impeller, the food disposer blade, a spacer plate, the impeller hood, a
flat plate, an O-ring, and the lower impeller. Lay the parts out in
order as you disassemble them so that you'll be able to reassemble them
properly.
Step 3:
Clean the parts thoroughly with a mild detergent solution. If any parts
are worn, replace them with new ones made for the dishwasher.
Step 4: Replace any seals, such as the O-ring or other washers, with new ones.
Step 5: Reassemble the pump, keeping the parts in order.
To
reach the water pump, remove the sprayer arm and screen and then the
pump housing. Remove the bolt, and the pump components can be
disassembled.
In
most dishwashers, the water pump is located under the lower sprayer
arm. This component pumps the water through the dishwasher. The pump
has two impellers, top and bottom. These, as well as other components,
can become clogged with food or detergent. Here's how to disassemble
the pump:
Step 1: Remove the cap that holds the sprayer arm on.
Step 2:
Remove the sprayer arm, the screen, the pump housing, a bolt, the upper
impeller, the food disposer blade, a spacer plate, the impeller hood, a
flat plate, an O-ring, and the lower impeller. Lay the parts out in
order as you disassemble them so that you'll be able to reassemble them
properly.
Step 3:
Clean the parts thoroughly with a mild detergent solution. If any parts
are worn, replace them with new ones made for the dishwasher.
Step 4: Replace any seals, such as the O-ring or other washers, with new ones.
Step 5: Reassemble the pump, keeping the parts in order.
To
reach the water pump, remove the sprayer arm and screen and then the
pump housing. Remove the bolt, and the pump components can be
disassembled.
On
some dishwashers, the lower impeller serves as a drain pump. This type
of system usually has a reversible motor; machines with nonreversible
motors have drain valves, as detailed previously. If your machine
possesses this impeller pump system, and the water will not drain from
the dishwasher, clean the lower pump impeller. This may solve the
problem. Otherwise, call a professional service person. 
To reach the water pump, remove the sprayer arm and screen and then the
pump housing. Remove the bolt, and the pump components can be disassembled.
If you need any more help let me know.
Please take a moment to accept the solution.
×
The most likely is either a defective drain pump or a clogged drain hose.
A faulty pump is often cause for machine not draining, but it is not the only possibility.
Check first the drain hose at the bottom inside the machine, ensure it is not clogged.
See the following suggestions from Repairclinic:
The water doesn't drain from the machine
If the water doesn't drain from your dishwasher, check these:
Drain line/air gap
Pump
Drain valve and/or solenoid
Belt
Motor
Timer
Drain line/air gap
A
clog in the drain line or air gap (if there is one) is the usual reason
that a dishwasher won't drain. Often the problem is at the point where
the drain line attaches to the garbage disposer or household drain
line. If you remove this line, you can clear any debris from the hose
or hose connection. Be sure to reattach the hose before starting the
dishwasher again.
Pump
Your
dishwasher pump ejects the water. The pump is usually mounted directly
to the motor, then attached to the bottom of the dishwasher. You can
reach the pump from inside the dishwasher, but first you need to remove
the lower rack, the spray arm, and the spray arm support.
Look
for an impeller--a round plastic fan blade-type of device that spins
around. This is the wash impeller, which forces the water through the
spray arm. Beneath the wash impeller is the drain impeller, which is
similar in size and shape to the wash impeller. The drain impeller
pushes the water toward the drain port. These components make up the
pump. If any of the pump components are defective, you need to replace
them.
Drain valve and/or solenoid
Many
dishwashers use a drain valve with an electric solenoid. When
electricity flows to the solenoid, the valve opens and diverts the
water to the drain. Sometimes the solenoid, or the diverting lever,
sticks and prevents the dishwasher from draining or filling properly.
Try to free up the solenoid to lubricate the lever. Otherwise, you may
have to replace the solenoid or pump assembly. With these systems, the
motor always rotates in one direction. When it's energized, the drain
valve diverts the water.
Other dishwashers simply reverse the
direction of the motor to drain the dishwasher. These units don't have
a drain valve. Instead, there's a drain hose connected directly to the
pump housing.
Belt
One brand of dishwasher uses a belt to drive the pump. If this belt is broken or has fallen off, replace it.
Motor
If
the motor isn't turning or working, the unit won't drain. First check
to be sure you have power to the dishwasher. If not, see the section
"It doesn't work at all." If the motor hums but doesn't turn, it may
need to be replaced.
Some dishwashers are susceptible to
getting stuck if you don't run them regularly. If you haven't run the
dishwasher for more than a week, you may need to manually spin the
motor to free it up. If the motor is defective, you need to replace it.
Dishwasher motors can't be serviced.
Timer
Part
of what the timer does is control the motor and drain valve. If the
timer doesn't work properly, the water may not drain and you need to
replace the timer. This problem is uncommon.
You can get replacemen parts and diagrams inserting the model number here.
You do not know if the pump is faulty, before replacing it you need to test the solenoid that activates the pump, and energize the pump directly to see if it works.
On some model you also need to test the motor assembly, and the motor relay.
To replace the pump you need just to access it, usually removing a small panel, remove it and replace it.
Here is a generic diagram, move the mouse on top of the picture to locate the motor and pump assembly.
You need to give us exact model number to get the diagrams.
See here if you need help finding the model number on your appliance.
Start checking the drain well here : 
Then you need to remove bottom panel, and check 0321D Non Return Valve and 0161 Drain Pump. 
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SOURCE: dishwasher not draining
Hello Tony,
Before pointing the finger at the pump.. try these few things first..
Make sure your drain screen filter is free of food by products and not restricting water flow out
Make sure your drain hose is not pinched, clogged or restricting water flow out
Make sure the place your drain hose drains into is not restricting water flow out
If you have water remaining in the base of the wash compartment, bail out as much as you can then run a dishless cycle to see how much water remains in the comaprtment. If it drains completely, then you should be ok.. if not then, you may have a bad pump, obstruction in the line into or out of that pump.. Let me know how it goes after you run thru the checks listed above and the outcome of the wash cycle. Hope this helps..
Regards
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Usually answered in minutes!
yes I realise i need this replacement but how do i replace it ?
What are the dimensions of the machine
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