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AO Smith
Gas Water Heater

Model # FCV40 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith FCV40 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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Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 18 parts  |
Pilot Assembly 183824-172
#5A

Water heater diagram

Pilot assembly

Part #183824-172

Replaced by #100109253

?
Manufacturer substitution
This part replaces 183824-172. Substitute parts can look different from the original.
$140.00
In Stock
Orifice 181791-51-FV
#3A

Water heater diagram

Orifice

Part #181791-51-FV

Replaced by #100109241

?
Manufacturer substitution
This part replaces 181791-51-FV. Substitute parts can look different from the original.
$31.11
In Stock
Gas Valve 182791-4
#13

Water heater diagram

Gas valve

Part #182791-4

Replaced by #100109217

?
Manufacturer substitution
This part replaces 182791-4. Substitute parts can look different from the original.
$229.09
In Stock
Insulation 183162
#2A

Water heater diagram

Insulation

Part #183162

Replaced by #100109214

?
Manufacturer substitution
This part replaces 183162. Substitute parts can look different from the original.
$31.11
In Stock
Screen 183159
#11

Water heater diagram

Screen

Part #183159

Replaced by #100109216

?
Manufacturer substitution
This part replaces 183159. Substitute parts can look different from the original.
$22.86
In Stock
Burner 183222-26
#1

Water heater diagram

Burner

Part #183222-26

Replaced by #100109316

?
Manufacturer substitution
This part replaces 183222-26. Substitute parts can look different from the original.
$186.36
In Stock
Anode Rod 183523-26
#18

Water heater diagram

Anode rod

Part #183523-26

Replaced by #100109624

?
Manufacturer substitution
This part replaces 183523-26. Substitute parts can look different from the original.
$31.11
In Stock
Drain Pan 23913-A
#25A

Water heater diagram

Drain pan

Part #23913-A

Replaced by #100108616

?
Manufacturer substitution
This part replaces 23913-A. Substitute parts can look different from the original.
$64.44
In Stock
Release Valve 76527-5
#19

Water heater diagram

Release valve

Part #76527-5

Replaced by #100108279

?
Manufacturer substitution
This part replaces 76527-5. Substitute parts can look different from the original.
$32.22
In Stock
Inlet Tube 183776-40
#12

Water heater diagram

Inlet tube

Part #183776-40

Replaced by #100108854

?
Manufacturer substitution
This part replaces 183776-40. Substitute parts can look different from the original.
$31.11
In Stock

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