Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
AO Smith
Gas Water Heater

Model # FSG50231 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith FSG50231 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:

  • 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”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Error Codes

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 40 parts  |
Thrmocoupl 23673
#9

Water heater diagram

Thrmocoupl

Part #23673

Replaced by #9000876015

?
Manufacturer substitution
This part replaces 23673. Substitute parts can look different from the original.
This item is not returnable
$17.99 | 
10% OFF Phone Price : $19.99
In Stock
Pilot 182165-4
#7A

Water heater diagram

Pilot

Part #182165-4

$43.49
In Stock
Gas Valve 181775-2
#27

Water heater diagram

Gas valve

Part #181775-2

Replaced by #9003408005

?
Manufacturer substitution
This part replaces 181775-2. Substitute parts can look different from the original.
$277.19 | 
10% OFF Was : $307.99
In Stock
Pilot Tube 23330
#11

Water heater diagram

Pilot tube

Part #23330

Replaced by #9004473115

?
Manufacturer substitution
This part replaces 23330. Substitute parts can look different from the original.
$29.49
In Stock
Hanger 181360
#3

Water heater diagram

Hanger

Part #181360

Replaced by #9004362115

?
Manufacturer substitution
This part replaces 181360. Substitute parts can look different from the original.
$18.99
In Stock
Orifice,pg 181791-50
#8

Water heater diagram

Orifice,pg

Part #181791-50

Replaced by #9002134

?
Manufacturer substitution
This part replaces 181791-50. Substitute parts can look different from the original.
$16.48 | 
11% OFF Phone Price : $18.48
In Stock
Dip Tube 21067-37
#28

Water heater diagram

Dip tube

Part #21067-37

Replaced by #100109602

?
Manufacturer substitution
This part replaces 21067-37. Substitute parts can look different from the original.
$29.48
In Stock
Restrictor 34894
#4

Water heater diagram

Restrictor

Part #34894

Replaced by #9004776115

?
Manufacturer substitution
This part replaces 34894. Substitute parts can look different from the original.
$18.75
In Stock
Insert 181235
#19

Water heater diagram

Insert

Part #181235

Replaced by #183360-000

?
Manufacturer substitution
This part replaces 181235. Substitute parts can look different from the original.
$16.49
In Stock
Drain Valve 42037
#29

Water heater diagram

Drain valve

Part #42037

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

Most common symptoms to help you fix your water heaters

Choose a symptom to see related water heater repairs.

View all

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

Main causes: loose water pipe fittings, leaky drain valve, bad temperature-pressure relief valve, leaky heating element,…

Read more

Why does my hot water smell like rotten eggs?

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

Read more

Why isn't my water heater heating my water?

Main causes: lack of power, no gas supply, thermostat limit switch tripped, bad element, bad thermostat, gas valve failu…

Read more

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…

Read more

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

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

Read more

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

Main causes: thermostats need adjustment, water heater capacity too low, bad heating element, thermostat failure, excess…

Read more

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…

Read more

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.

View all
Wiring schematic symbols explained video

Wiring schematic symbols explained video

Learn some of the most common symbols found in a wiring diagram and what they mean.…

Read more
How to read a wiring schematic video

How to read a wiring schematic video

Learn how to decipher symbols so you can buy the right part for your problem.…

Read more
Water heater common questions

Water heater common questions

These common questions and answers can help you make the most of your water heater.…

Read more

Parts & More