If the water doesn't drain from your dishwasher completely, check these:
Drain line/air gap
Drain valve and/ or solenoid
Drain line/air gap
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 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.
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
Drain valve and/or solenoid
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
One brand of dishwasher uses a belt to drive the pump. If this belt is broken or has fallen off, replace it.
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.
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.
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.