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Model # 550 Official Aprilaire humidifier
Here are the diagrams and repair parts for Official Aprilaire 550 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”.
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For DIY troubleshooting advice and repair guides, visit our repair help section.
Model diagram and schematic
SEARCH WITHIN THIS MODEL
ALL PARTS
Showing 10 of 24 parts |
#14
Model 550 diagram
Transformer
Part #4010
The manufacturer no longer makes this part, and there's no substitute part
#1
Model 550 diagram
Wick pad
Part #10
The manufacturer no longer makes this part, and there's no substitute part
#4
Model 550 diagram
Base
Part #4219
The manufacturer no longer makes this part, and there's no substitute part
#NI
All parts diagram
Current sensing relay
Part #50
The manufacturer no longer makes this part, and there's no substitute part
#8
Model 550 diagram
Drain
Part #4223
The manufacturer no longer makes this part, and there's no substitute part
#NI
All parts diagram
Adptr-vlv
Part #4229
The manufacturer no longer makes this part, and there's no substitute part
#13
Model 550 diagram
Compression fitting (6)
Part #4076
The manufacturer no longer makes this part, and there's no substitute part
#NI
All parts diagram
Tube-drain
Part #4047
The manufacturer no longer makes this part, and there's no substitute part
#6
Model 550 diagram
Panel
Part #4221
The manufacturer no longer makes this part, and there's no substitute part
#15
Model 550 diagram
Humidistat
Part #4016
The manufacturer no longer makes this part, and there's no substitute part
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