Whirlpool DP940 ユーザーズマニュアル

Check the drain air gap anytime your dishwasher isn’t draining 
well.

Some state or local plumbing codes require the addition of a 
drain air gap between a built-in dishwasher and the home drain 
system. If a drain is clogged, the drain air gap protects your 
dishwasher from water backing up into it.

The drain air gap is usually located on top of the sink or 
countertop near the dishwasher. To order a drain air gap, contact 
your local dealer; or in the U.S.A., call the Customer Interaction 
Center and ask for Part Number 300096.

NOTE: The drain air gap is an external plumbing device that is 
not part of your dishwasher. The warranty provided with your 
dishwasher does not cover service costs directly associated with 
the cleaning or repair of the external drain air gap.

Clean the drain air gap periodically to ensure proper drainage of 
your dishwasher. Follow the cleaning instructions provided by the 
manufacturer. With most types, you lift off the chrome cover. 
Unscrew the plastic cap. Then check for any soil buildup. Clean if 
necessary.

Protect your dishwasher during the summer months by turning 
off the water supply and power supply to the dishwasher.

Protect your dishwasher and home against water damage due to 
freezing water lines. If your dishwasher is left in a seasonal 
dwelling or could be exposed to near freezing temperatures, have 
your dishwasher winterized by authorized service personnel.

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Is the door closed tightly and latched?

Is the right cycle selected? Refer to the “Cycle Selection 
Charts.”

Is there power to the dishwasher? Has a household fuse 
blown, or has a circuit breaker tripped?

Has the motor stopped due to an overload? The motor 
automatically resets itself within a few minutes. If it does not 
restart, call for service.

Is the water shut-off valve (if installed) turned on?

■

Is the overfill protection float able to move up and down 
freely? Press down to release.

■

Is the water supplied to the dishwasher hot enough? The 
dishwasher runs longer while heating water. Refer to the 
“Dishwasher Efficiency Tips” section.

A delay automatically occurs in some wash and rinse cycles 
until the water reaches the proper temperature.

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Is the cycle complete?

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Is the cycle complete?

Is the detergent lump-free? Replace detergent if necessary.

Is the bottom rack installed properly? Refer to the “Parts and 
Features” section. Reinstall the rack if necessary.

■

Was too much detergent used? Refer to the “Detergent 
Dispenser” section.

Is the brand of detergent making excess foam? Try a different 
brand to reduce foaming and eliminate buildup.

■

Are dishes washed only every 2 or 3 days? Run a rinse cycle 
once or twice a day until you have a full load.

Does the dishwasher have a new plastic smell? Run a vinegar 
rinse as described in “Spotting and filming on dishes” later in 
this Troubleshooting guide.

■

Is the dishwasher aligned with the countertop? Moisture from 
the vent in the dishwasher console can form on the counter. 
Refer to the Installation Instructions for more information.

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Is the dishwasher loaded correctly? Refer to the “Dishwasher 
Loading” section.

Is the water temperature too low? For best dishwashing 
results, water should be 120°F (49°C) as it enters the 
dishwasher. Refer to the “Dishwasher Efficiency 
Tips” section.

Did you use the correct amount of fresh detergent? Use 
recommended dishwasher detergents only. Refer to the 
“Detergent Dispenser” section. Do not use less than 1 tb 
(15 g) per load. Detergent must be fresh to be effective. Store 
detergent in a cool, dry area. Heavy soil and/or hard water 
generally require extra detergent.