Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Tips to find your model number
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Aprilaire
Humidifier

Model # 224 Official Aprilaire humidifier

Here are the diagrams and repair parts for Official Aprilaire 224 humidifier, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

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

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 23 parts  |
Wick Pad 12
#7

Humidifier diagram

Wick pad

Part #12

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

Transformer 4010
#9

Humidifier diagram

Transformer

Part #4010

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

Stainer 4004
#3

Humidifier diagram

Stainer

Part #4004

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

Valve Sadd 4001
#1

Humidifier diagram

Valve sadd

Part #4001

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

Retainer 4052
#15

Humidifier diagram

Retainer

Part #4052

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

Lwr Hsng 4049
#13

Humidifier diagram

Lwr hsng

Part #4049

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

Automatic Humidifier Sensor And Shield 4278

#NI02

All parts diagram

Automatic humidifier sensor and shield

Part #4278

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

Screw And Clip Set 4027
#2

Humidifier diagram

Screw and clip set

Part #4027

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

Valve 4040
#4

Humidifier diagram

Valve

Part #4040

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

Water Distribution Pan Cover 4044
#11

Humidifier diagram

Water distribution pan cover

Part #4044

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

Repair guides for side-by-side refrigerators

How to replace a foamed-in-place door gasket in a side-by-side refrigerator

How to replace a foamed-in-place door gasket in a side-by-side refrigerator

The door gasket seals the gap around the door to keep the cold air in and the warm air out. Replace a worn or damaged do…

Read more
Repair difficulty
Time required
 30 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
How to replace a defrost sensor in a side-by-side refrigerator

How to replace a defrost sensor in a side-by-side refrigerator

If frost is building up in the freezer of your side-by-side refrigerator, the defrost sensor could be at fault. You can …

Read more
Repair difficulty
Time required
 45 minutes or less

Articles and videos for side-by-side refrigerators

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.…

Read more
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.…

Read more
How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Read more

Parts & More