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Whirlpool
Dehumidifier

Model # D300 Official Whirlpool dehumidifier

Here are the diagrams and repair parts for Official Whirlpool D300 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 77 parts  |
Screw 489073
Screw

Part #489073

Replaced by #WP488729

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Manufacturer substitution
This part replaces 489073. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$4.39 | 
19% OFF Phone Price : $5.39
In Stock
Valve Kit 978025
Valve kit

Part #978025

Replaced by #WP978025

?
Manufacturer substitution
This part replaces 978025. Substitute parts can look different from the original.
$29.51 | 
17% OFF Phone Price : $35.51
In Stock
Screw 488234
#27

Air flow and control parts diagram

Screw

Part #488234

Replaced by #WP488234

?
Manufacturer substitution
This part replaces 488234. Substitute parts can look different from the original.
This item is not returnable
$4.20
In Stock
Valve Kit 978026
Valve kit

Part #978026

Replaced by #978026

?
Manufacturer substitution
This part replaces 978026. Substitute parts can look different from the original.
$34.19 | 
15% OFF Phone Price : $40.19
In Stock
Washer 647338
Washer

Part #647338

Replaced by #285448A

?
Manufacturer substitution
This part replaces 647338. Substitute parts can look different from the original.
This item is not returnable
$4.60 | 
18% OFF Phone Price : $5.60
In Stock
Bend 855199
#32

Unit parts diagram

Bend

Part #855199

Replaced by #WP855199

?
Manufacturer substitution
This part replaces 855199. Substitute parts can look different from the original.
This item is not returnable
$4.33
In Stock
Wire Tie 602851
#25

Air flow and control parts diagram

Wire tie

Part #602851

Replaced by #WPW10339879

?
Manufacturer substitution
This part replaces 602851. Substitute parts can look different from the original.
This item is not returnable
$4.37 | 
19% OFF Phone Price : $5.37
In Stock
Refrigerant Access Valve, 5/8-in 978029
Refrigerant access valve, 5/8-in

Part #978029

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

Valve Kit 978030
Valve kit

Part #978030

Replaced by #978030

?
Manufacturer substitution
This part replaces 978030. Substitute parts can look different from the original.
$40.49 | 
13% OFF Phone Price : $46.49
In Stock
Nut 486197
#17

Unit parts diagram

Nut

Part #486197

Replaced by #488660

?
Manufacturer substitution
This part replaces 486197. Substitute parts can look different from the original.
$16.79 | 
11% OFF Phone Price : $18.79
In Stock

Most common symptoms to help you fix your dehumidifiers

Choose a symptom to see related dehumidifier repairs.

View all

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 …

Read more

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…

Read more
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…

Read more
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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