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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 5148000800

#43

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Switch

Part #5148000800

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

Cover 535355

#28

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Cover

Part #535355

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

Stopper 534506

#20

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Stopper

Part #534506

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

Switch 5248000400

#32A

All parts diagram

Switch

Part #5248000400

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

Base 690351

#7

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Base

Part #690351

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

Condenser Pump 5148000500

#34A

All parts diagram

Condenser pump

Part #5148000500

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 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 won't my dehumidifier run?

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

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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 is there frost on my dehumidifier's coil?

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

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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 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 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 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 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.…

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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
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

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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Wiring schematic symbols explained video

Wiring schematic symbols explained video

Learn some of the most common symbols found in a wiring diagram and what they mean.…

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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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