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When the detergent cup doesn't
open, check these:TimerBi-metal switch or wax motorDetergent cup,
On many dishwashers, a plastic
actuator arm mechanically links the timer to the detergent cup. When the timer
reaches the proper time in the cycle, the timer activates a lever that opens the
detergent cup. If the linkage is broken or defective, the cup stays closed after
you've closed it. Check the link and repair or replace it, as necessary.
Bi-metal switch or wax
A bi-metal switch is a simple
electrical device that deforms when electricity is applied to it. The degree of
this deformation can be engineered to concise standards.
energizes the bi-metal switch inside your dishwasher door--directly behind the
detergent cup--when the detergent cup should open. When energized, the bi-metal
switch deforms away from the detergent cup latch, which opens the detergent cup.
If the bi-metal switch is defective, it may not deform enough to open the cup.
If that happens, you need to replace it.
On some dishwashers, the bimetal
switch is wired through the heating element or motor circuit. If the element is
broken (or open), or if the motor is drawing low current because of a low-fill
situation, the bi-metal switch doesn't open properly.
models use a wax motor instead of a bi-metal switch. It's a sealed unit with wax
that heats up and pushes a piston through to open the door. The wax motor,
controlled by the timer, mechanically opens the door.
The detergent cup itself can become
clogged with old dried detergent that prevents it from opening. Sometimes just
cleaning the cup takes care of the problem. If not, you probably need to replace
the entire cup assembly
The cycles times are too
If your dishwasher's cycle times
are too long, check these:Water
Your dishwasher may pre-heat the
water. If so, and if the water entering the dishwasher is cool, the heater may
take up to half an hour to heat the water.
To avoid the wait, increase
the incoming water temperature before turning on the dishwasher. Do that by
running the kitchen sink faucet until the water runs hot. Or increase the
temperature of the hot water to the entire house at the hot water
Warning! To lessen the risk of scalding, don't set the hot water
heater temperature higher than 120 degrees Fahrenheit.
See "The cycle doesn't complete"