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AO Smith
Gas Water Heater

Model # FCG100245 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith FCG100245 water heater, 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:

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  • 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.

Error Codes

Model diagram and schematic

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Showing 10 of 26 parts  |
Thermocouple 35489-2
#7

Water heater diagram

Thermocouple

Part #35489-2

Replaced by #H06E-36

?
Manufacturer substitution
This part replaces 35489-2. Substitute parts can look different from the original.
This item is not returnable
$14.52 | 
12% OFF Phone Price : $16.52
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Restrictor 35405
#17

Water heater diagram

Restrictor

Part #35405

This item is not returnable
$3.05
In Stock
Label 182734
#23

Water heater diagram

Label

Part #182734

Replaced by #182734-000

?
Manufacturer substitution
This part replaces 182734. Substitute parts can look different from the original.
$13.99
In Stock
Burner Tube 181784
#3

Water heater diagram

Burner tube

Part #181784

Replaced by #181784-000

?
Manufacturer substitution
This part replaces 181784. Substitute parts can look different from the original.
$32.49
In Stock
Label 182852
#21

Water heater diagram

Label

Part #182852

Replaced by #182852-000

?
Manufacturer substitution
This part replaces 182852. Substitute parts can look different from the original.
$13.99
In Stock
Label 181376
#18

Water heater diagram

Label

Part #181376

Replaced by #181376-000

?
Manufacturer substitution
This part replaces 181376. Substitute parts can look different from the original.
This item is not returnable
$2.49
In Stock
Burner 41157-8
#4

Water heater diagram

Burner

Part #41157-8

Replaced by #9004089005

?
Manufacturer substitution
This part replaces 41157-8. Substitute parts can look different from the original.
$83.49
In Stock
Owner's Manual 183519
#NI

Water heater diagram

Owner's manual

Part #183519

Replaced by #183519-000

?
Manufacturer substitution
This part replaces 183519. Substitute parts can look different from the original.
$9.49
In Stock
Label 41259
#19

Water heater diagram

Label

Part #41259

Replaced by #041259-000

?
Manufacturer substitution
This part replaces 41259. Substitute parts can look different from the original.
This item is not returnable
$2.49
In Stock
Valve 76527-3
#28

Water heater diagram

Valve

Part #76527-3

Replaced by #100108279

?
Manufacturer substitution
This part replaces 76527-3. Substitute parts can look different from the original.
$32.22
In Stock

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