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Aprilaire
Humidifier

Model # 112 Official Aprilaire humidifier

Here are the diagrams and repair parts for Official Aprilaire 112 humidifier, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 33 parts  |
Transformer 4010

#NI

All parts diagram

Transformer

Part #4010

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

Humidistat 4258
#26

Model 112 diagram

Humidistat

Part #4258

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

Wick Pad 12
#7

Model 112 diagram

Wick pad

Part #12

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

Bushing 4029
#20

Model 112 diagram

Bushing

Part #4029

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

Cork Isolator (6) 4031
#22

Model 112 diagram

Cork isolator (6)

Part #4031

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

Stainer 4004
#19

Model 112 diagram

Stainer

Part #4004

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

Compression Fitting And Strainer (6) 4003
#3

Model 112 diagram

Compression fitting and strainer (6)

Part #4003

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

Cord-power 4260
#12

Model 112 diagram

Cord-power

Part #4260

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

Orifice 4021
#5

Model 112 diagram

Orifice

Part #4021

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

Upper Housing 4018
#14

Model 112 diagram

Upper housing

Part #4018

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

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