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DeLonghi
Dehumidifier

Model # DN40UL Official DeLonghi dehumidifier

Here are the diagrams and repair parts for Official DeLonghi DN40UL dehumidifier, as well as links to manuals and error code tables, if available.

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Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 46 parts  |
Switch 5248000400

#32A

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Switch

Part #5248000400

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

Thermostat 521431

#26

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Thermostat

Part #521431

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

Compressor 5148000900

#34

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Compressor

Part #5148000900

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

Cover 535355

#28

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Cover

Part #535355

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

Water Tank 5548000400

#8

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Water tank

Part #5548000400

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

Stopper 534506

#20

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Stopper

Part #534506

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

Base 690351

#7

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Base

Part #690351

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

Light 5148000600

#46

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Light

Part #5148000600

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

Red Lens 511407

#24

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Red lens

Part #511407

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

Switch 5148000800

#43

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Switch

Part #5148000800

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 …

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Why won't my dehumidifier turn on?

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

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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…

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

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

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Why is there frost on my dehumidifier's coil?

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

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Why isn't my dehumidifier draining?

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

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Why is my dehumidifier noisy?

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

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Why won't my dehumidifier run?

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

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Why does my dehumidifier leak water?

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

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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

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…

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Repair difficulty
Time required
 45 minutes or less
How to replace a dehumidifier user interface control board

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.…

Read more
Repair difficulty
Time required
 30 minutes or less
How to replace a dehumidifier sensor assembly

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…

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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

How to repair broken or damaged wires video

Learn how to repair broken, frayed or damaged wires in your appliances.…

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How to use a multimeter to test electrical parts video

How to use a multimeter to test electrical parts video

Learn how to use a multimeter to check for wiring problems in an appliance that's not working…

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How does a dehumidifier work?

How does a dehumidifier work?

Discover how a dehumidifier works.…

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