Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Tips to find your model number
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 # 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:

  • 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 26 parts  |
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
Restrictor 35405
#17

Water heater diagram

Restrictor

Part #35405

This item is not returnable
$3.05
In Stock
Burner 194549
#4A

Water heater diagram

Burner

Part #194549

Replaced by #9003040005

?
Manufacturer substitution
This part replaces 194549. Substitute parts can look different from the original.
$50.49
In Stock
Collar 20172-21
#10

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
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
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
Inlet Tube 183712
#26

Water heater diagram

Inlet tube

Part #183712

Replaced by #9006758005

?
Manufacturer substitution
This part replaces 183712. Substitute parts can look different from the original.
$41.99
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 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
Anode Rod 183463-48
#1A

Water heater diagram

Anode rod

Part #183463-48

Replaced by #100108660

?
Manufacturer substitution
This part replaces 183463-48. Substitute parts can look different from the original.
$60.00
In Stock

Most common symptoms to help you fix your water heaters

Choose a symptom to see related water heater repairs.

View all

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 the water hot enough?

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

Read more

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 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 making the water too hot?

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

Read more

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

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

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
Using a wiring schematic to trace a current video

Using a wiring schematic to trace a current video

Find out what’s wrong with your appliance by following a circuit.…

Read more
Easy DIY water heater repairs

Easy DIY water heater repairs

Read about some water heater repairs that you can easily do yourself.…

Read more

Parts & More