Whirlpool DU7400XS series Use & Care Manual page 13

PROBLEM
Dishes not
washing clean
CAUSED BY
Water is not
hot enough
SOLUTION
Water temperature should be at least 140_F (60°C]. Set
water heater thermostat to a higher setting Run water at
sink until hot before starting.
Cloudy film on
glassware,
etching -
permanent
€orroslon
Dlshes &
Interlor of
dlshwasher
yellow or
brown
Rust spots on
stalnless steel
-OR-
Dark spots on
flatware -
stalnless steel,
silver plate, or
sterllng
Bronze tarnish
on silverplate
Water left in
bottom of
dishwasher
Improper loading
Spray arm or arms not
rotating freely
Not enough detergent
or improper
detergent
"Old" detergent
Water pressur e may
be low, dishwasher is
not filling properly
Too much detergent
in soft water
Inadequate rinsing
Iron or manganese in
water
Allowing salty or
acidic foods such as
mayonnaise, vinegar,
fruit juices, salad
dressings, milk
products to remain on
flatware.
Undissolved
detergenl coming in
contact with flatware
Silverplate is worn off
Exposed base metal
takes on a bronzed
hue.
Dishwasher cycle not
completed
Clogged drain air
gap
Make sure dishes and glassware are loaded so spray
reaches all surfaces and items drain properly. Do not ov-
erload Do not nest items.
Make sure large items do not block spray from reaching
detergent dispensers
Check spray arms to make sure they turn freely after load-
ing. Be sure a utensil has not prevented theirturning.
Use more dishwasher detergent. Use detergent with high-
est available phosphorus content...especially with hard
water
Use only fresh dishwasher detergent. Store tightly closed
container in cool, dry place. Discard old detergent, Do not
fill dispensers until ready to start dishwasher.
If water pressure is low, do not use water for other purposes
while dishwasher is running [to assure correct fills].
Check for rainbow hue on glasses. A rainbow hue is the
first sign of etching (corrosion of glass]. Reduce the amount
of dishwasher detergent Use a detergent with a lower
phosphorus content.
If water pressure is low do not use water for other purposes
while dishwasher is running [to assure correct water fills].
Make sure dishes and glassware are loaded properly to
assure adequate rinsing and draining. Do not overload.
Temporary remedy:
1. Set empty dishwasher for a "one wash" cycle.
2. Start dishwasher and unlatch door to stop if when it has
filled for the wash part of the cycle.
3 Add _,;_ to _,;,cup 1120 to 240 mL] of citric acid crystals
[usually available in drugstores].
4. Close and latch doorro complete cycle.
Permanent solution: Install an iron or manganese filter to
home water supply
Rinse flatware that is to stand for several hours before
washing (use Rinse & Hold]. Clean stained items with silver
polish and re-wash, Do not put stainless steel and sliver
flatware In the same sllverware basket compartment.
Dlrect contact between these metals can cause perma-
nent damage to the sllver.
Remove spots with silver polish. Avoid spilling concentrated
detergent on wet flatware.
Remove tarnish with silver polish. Have silver replated.
Allow dishwasher to complete cycle.
Some plumbing codes require,use of a drain air gap be-
tween an undercounter dishwasher and the drain system of
the house. The air gap is usually located above the sink or
on the top of the counter near the dishwasher to prevent the
possibility of water backing up from the drain into the dish-
washer due to a plugged drain. The drain air gap is NOT a
part of the dishwasher and is NOT covered by the dish-
washer warranty. The drain air gap should be kept clean to
ensure proper draining of the dishwasher.
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