Model # AD40USL3 Official Whirlpool dehumidifier

Here are the diagrams and repair parts for Official Whirlpool AD40USL3 dehumidifier, as well as links to manuals and error code tables, if available.

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Owner’s manual

Error Codes

Model diagram and schematic

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Showing 10 of 46 parts |

Screw, 8 x 1

Part #488480

Replaced by #WP489069

This item is not returnable

$4.39

19% OFF Phone Price : $5.39

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#25

Air flow and control parts diagram

Cable tie

Part #857547

Replaced by #WPW10339879

This item is not returnable

$4.37

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#10

Unit parts diagram

Overload

Part #1186980

Replaced by #1186959

$29.24

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#10

Air flow and control parts diagram

Fan motor

Part #1186838

Replaced by #4389130

$191.18

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#NI

Cabinet parts diagram

Valve kit

Part #978025

Replaced by #WP978025

$29.51

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#NI

Cabinet parts diagram

Valve kit

Part #978030

Replaced by #978030

$40.49

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Cabinet parts diagram

Hose cover

Part #1172098

The manufacturer no longer makes this part, and there's no substitute part

#NI

Cabinet parts diagram

Tape

Part #505168

The manufacturer no longer makes this part, and there's no substitute part

#17

Unit parts diagram

Clip

Part #8011446

The manufacturer no longer makes this part, and there's no substitute part

Air flow and control parts diagram

Literature parts (wiring diagram)

Part #LIT1186973

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your dehumidifiers

Choose a symptom to see related dehumidifier repairs.

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Why doesn't my dehumidifier remove moisture?

Main causes: dirty air filter, clogged grill, dehumidifier placed too close to the wall, dehumidifier too small for the ...

Why won't my dehumidifier turn on?

Main causes: lack of electrical power, wiring failure, electronic control board failure, user interface control failure...

Why does my dehumidifier run all the time?

Main causes: dehumidifier too small for the space, bad humidity sensor, faulty evaporator thermistor, low refrigerant, b...

Why isn't my dehumidifier's remote monitor working?

Main causes: weak or dead batteries, out of range, radio frequency interference...

Why is there frost on my dehumidifier's coil?

Main causes: room temperature below 65 degrees Fahrenheit, control system failure...

Why isn't my dehumidifier draining?

Main causes: clogged drain hose, drain hose not properly connected...

Why is my dehumidifier noisy?

Main causes: loose fan motor mounting screws, loose compressor mounting bracket screws, bad fan, faulty compressor...

Why won't my dehumidifier run?

Main causes: collection bucket not installed, collection bucket full of water...

Why does my dehumidifier leak water?

Main causes: collection bucket not installed correctly, cracked collection bucket, loose drain hose connection...

Most common repair guides to help fix your dehumidifiers

These step-by-step repair guides will help you safely fix what’s broken on your dehumidifier.

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How to replace a dehumidifier electronic control board

If the dehumidifier won’t power up because the control board has failed, use the steps in this repair guide to replace t...

Repair difficulty

Time required

45 minutes or less

How to replace a dehumidifier user interface control board

If the dehumidifier doesn’t respond when you try to set it, follow these steps to replace it....

Repair difficulty

Time required

30 minutes or less

How to replace a dehumidifier sensor assembly

If the humidifier sensor doesn’t properly detect humidity or evaporator temperature, install a new sensor assembly, foll...

Repair difficulty

Time required

45 minutes or less

Effective articles & videos to help repair your dehumidifiers

Use the advice and tips in these articles to get the most out of your dehumidifier.

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How to repair broken or damaged wires video

Model # AD40USL3 Official Whirlpool dehumidifier

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Most common symptoms to help you fix your dehumidifiers

Why doesn't my dehumidifier remove moisture?

Why won't my dehumidifier turn on?

Why does my dehumidifier run all the time?

Why isn't my dehumidifier's remote monitor working?

Why is there frost on my dehumidifier's coil?

Why isn't my dehumidifier draining?

Why is my dehumidifier noisy?

Why won't my dehumidifier run?

Why does my dehumidifier leak water?

Most common repair guides to help fix your dehumidifiers

How to replace a dehumidifier electronic control board

How to replace a dehumidifier user interface control board

How to replace a dehumidifier sensor assembly

Effective articles & videos to help repair your dehumidifiers

How to repair broken or damaged wires video

How to use a multimeter to test electrical parts video

How does a dehumidifier work?

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