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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  |
Wick Pad 12
#7

Model 112 diagram

Wick pad

Part #12

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

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

Motor Mounting Plate 4024
#16

Model 112 diagram

Motor mounting plate

Part #4024

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

Bracket 4030
#21

Model 112 diagram

Bracket

Part #4030

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

Relay 4012

#NI

All parts diagram

Relay

Part #4012

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

Humidistat 4016
#13

Model 112 diagram

Humidistat

Part #4016

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

Closure Clip Set (6 Sets/ctn) 4025
#17

Model 112 diagram

Closure clip set (6 sets/ctn)

Part #4025

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

Scale Control Insert 4023
#8

Model 112 diagram

Scale control insert

Part #4023

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

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