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Aprilaire
Humidifier

Model # 110 Official Aprilaire humidifier

Here are the diagrams and repair parts for Official Aprilaire 110 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 32 parts  |
Transformer 4010

#NI

All parts diagram

Transformer

Part #4010

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

Valve Sadd 4001
#1

Model 110 diagram

Valve sadd

Part #4001

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

Humidistat 4258
#26

Model 110 diagram

Humidistat

Part #4258

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

Wick Pad 10
#7

Model 110 diagram

Wick pad

Part #10

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

Replacement Kit 4038

#NI

All parts diagram

Replacement kit

Part #4038

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

Disconnect 4014
#11

Model 110 diagram

Disconnect

Part #4014

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

Cork Isolator (6) 4031
#22

Model 110 diagram

Cork isolator (6)

Part #4031

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

Fan Blade 4032
#23

Model 110 diagram

Fan blade

Part #4032

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

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

Model 110 diagram

Closure clip set (6 sets/ctn)

Part #4025

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

Pump Assembly/motor Board 4009
#8

Model 110 diagram

Pump assembly/motor board

Part #4009

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

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