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AO Smith
Gas Water Heater

Model # FPD40270 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith FPD40270 water heater, as well as links to manuals and error code tables, if available.

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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 59 parts  |
Valve 76527-3
#55

Water heater diagram

Valve

Part #76527-3

Replaced by #9000071

?
Manufacturer substitution
This part replaces 76527-3. Substitute parts can look different from the original.
$15.54 | 
11% OFF Phone Price : $17.54
In Stock
Angle,l 181450
#14

Water heater diagram

Angle,l

Part #181450

This item is not returnable
$2.16
In Stock
Drain Valve 42037
#53

Water heater diagram

Drain valve

Part #42037

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

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
Combo.valv 183760
#18

Water heater diagram

Combo.valv

Part #183760

Replaced by #100109724

?
Manufacturer substitution
This part replaces 183760. Substitute parts can look different from the original.
$392.50
In Stock
Insulation 181639-1
#42

Water heater diagram

Insulation

Part #181639-1

Replaced by #9003971005

?
Manufacturer substitution
This part replaces 181639-1. Substitute parts can look different from the original.
$21.99
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
Natural Gas Burner 182730
#8

Water heater diagram

Natural gas burner

Part #182730

Replaced by #100109226

?
Manufacturer substitution
This part replaces 182730. Substitute parts can look different from the original.
$44.44
In Stock
Inlet Tube 183359-41
#50

Water heater diagram

Inlet tube

Part #183359-41

Replaced by #183359-041

?
Manufacturer substitution
This part replaces 183359-41. Substitute parts can look different from the original.
This item is not returnable
$6.49
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

Most common symptoms to help you fix your water heaters

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Why is there water in my water heater's drain pan?

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Why does my hot water smell like rotten eggs?

Main causes: water supply needs chlorine treatment, anode rod too reactive…

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

Main causes: broken heating element, thermostat failure, excessive tank sediment, tank size too small, burner valve asse…

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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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