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AO Smith
Gas Water Heater

Model # FPD40271 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith FPD40271 water heater, as well as links to manuals and error code tables, if available.

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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 59 parts  |
Combo.valv 183760-1
#18A

Water heater diagram

Combo.valv

Part #183760-1

Replaced by #9004310005

?
Manufacturer substitution
This part replaces 183760-1. Substitute parts can look different from the original.
$353.59 | 
$12.00 OFF Phone Price : $365.59
In Stock
Angle,l 181450
#14

Water heater diagram

Angle,l

Part #181450

This item is not returnable
$2.16
In Stock
Collar 20172-21
#12

Water heater diagram

Collar

Part #20172-21

Replaced by #9004610115

?
Manufacturer substitution
This part replaces 20172-21. Substitute parts can look different from the original.
$15.99
In Stock
Sealant 181564
#36

Water heater diagram

Sealant

Part #181564

Replaced by #9004365105

?
Manufacturer substitution
This part replaces 181564. Substitute parts can look different from the original.
$14.49
In Stock
Tee Tube 181762
#38

Water heater diagram

Tee tube

Part #181762

Replaced by #181762-000

?
Manufacturer substitution
This part replaces 181762. Substitute parts can look different from the original.
$67.99
In Stock
Installation Assembly 183092
#NI

Water heater diagram

Installation assembly

Part #183092

Replaced by #183092-000

?
Manufacturer substitution
This part replaces 183092. Substitute parts can look different from the original.
$654.49
In Stock
Exhaust Ay 181528
#NI

Water heater diagram

Exhaust ay

Part #181528

Replaced by #100108686

?
Manufacturer substitution
This part replaces 181528. Substitute parts can look different from the original.
$119.00
In Stock
Igniter Assembly 184047
#9

Water heater diagram

Igniter assembly

Part #184047

Replaced by #100109355

?
Manufacturer substitution
This part replaces 184047. Substitute parts can look different from the original.
$160.00
In Stock
Bi-metal Tip 21224
#26

Water heater diagram

Bi-metal tip

Part #21224

Replaced by #9004660105

?
Manufacturer substitution
This part replaces 21224. Substitute parts can look different from the original.
$72.99
In Stock
Coupling 182269
#29

Water heater diagram

Coupling

Part #182269

Replaced by #182269-000

?
Manufacturer substitution
This part replaces 182269. Substitute parts can look different from the original.
$17.99
In Stock

Most common symptoms to help you fix your water heaters

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Why does my hot water smell like rotten eggs?

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Why isn't my water heater making enough hot water?

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Why is my water heater making the water too hot?

Main causes: thermostat temperature set too high, thermostats need adjustment, faulty thermostat, shorted heating elemen…

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Why is my water heater's pressure relief valve dripping water?

Main causes: faulty pressure relief valve, water is overheating…

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Effective articles & videos to help repair your water heaters

Use the advice and tips in these articles and videos to get the most out of your water heater.

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Wiring schematic symbols explained video

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