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Aprilaire
Humidifier

Model # 445 Official Aprilaire humidifier

Here are the diagrams and repair parts for Official Aprilaire 445 humidifier, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 27 parts  |
Valve Sadd 4001
#1

Model 445 diagram

Valve sadd

Part #4001

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

Humidistat 4258
#25

Model 445 diagram

Humidistat

Part #4258

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

Wick Pad 12
#11

Model 445 diagram

Wick pad

Part #12

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

Float (only) 4088
#3

Model 445 diagram

Float (only)

Part #4088

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

Water Distribution Tray 4081
#10

Model 445 diagram

Water distribution tray

Part #4081

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

Humidistat Adapter Plate 4039

#NI

All parts diagram

Humidistat adapter plate

Part #4039

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

Cord-power 4261
#18

Model 445 diagram

Cord-power

Part #4261

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

Scale Control Insert (12) 4080
#12

Model 445 diagram

Scale control insert (12)

Part #4080

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

Float, Float Valve Body And Arm 4087
#2

Model 445 diagram

Float, float valve body and arm

Part #4087

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

Fan Blade 4090
#8

Model 445 diagram

Fan blade

Part #4090

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

Repair guides for bottom-mount refrigerators

How to replace a flipper mullion on a French-door refrigerator

How to replace a flipper mullion on a French-door refrigerator

If the flipper mullion breaks or its heater quits working, replace it in 15 minutes using these 4 easy steps.…

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Repair difficulty
Time required
 15 minutes or less
How to replace a door gasket in a French-door refrigerator

How to replace a door gasket in a French-door refrigerator

The door gasket, often called a door seal, seals the gap around the door to keep the cold air in and the warm air out. R…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a refrigerator water valve

How to replace a refrigerator water valve

Replace the water valve that feeds water to the ice maker and water dispenser if it no longer controls the flow of water…

Read more
Repair difficulty
Time required
 15 minutes or less

Articles and videos for bottom-mount refrigerators

How to Replace the Water Filter in a GE Profile Refrigerator

How to Replace the Water Filter in a GE Profile Refrigerator

No matter what style GE Profile refrigerator you have, we can walk you through replacing the water filter.…

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How to Replace the Water Filter in a GE Refrigerator

How to Replace the Water Filter in a GE Refrigerator

See how to install the water filter on your GE refrigerator, no matter the filter type or refrigerator style.…

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How to Replace the Water Filter in a Maytag Refrigerator

How to Replace the Water Filter in a Maytag Refrigerator

No matter what style Maytag refrigerator you have, we can walk you through replacing the water filter.…

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