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.

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Browse Parts for
FCG100245 Water Heaters
Restrictor 35405
#17

Water heater diagram

Restrictor

Part #35405

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

Water heater diagram

Burner

Part #194549

Replaced by #9003040005

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Manufacturer substitution
This part replaces 194549. Substitute parts can look different from the original.
In Stock
Tube 1417-60
#9

Water heater diagram

Tube

Part #1417-60

Replaced by #100109617

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Manufacturer substitution
This part replaces 1417-60. Substitute parts can look different from the original.
In Stock
Collar 20172-21
#10

Water heater diagram

Collar

Part #20172-21

Replaced by #9004610115

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Manufacturer substitution
This part replaces 20172-21. Substitute parts can look different from the original.
In Stock
Label 182734
#23

Water heater diagram

Label

Part #182734

Replaced by #182734-000

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Manufacturer substitution
This part replaces 182734. Substitute parts can look different from the original.
In Stock
Label 181376
#18

Water heater diagram

Label

Part #181376

Replaced by #181376-000

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Manufacturer substitution
This part replaces 181376. Substitute parts can look different from the original.
This item is not returnable
In Stock
Inner Door 39923
#12

Water heater diagram

Inner door

Part #39923

Replaced by #100109442

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Manufacturer substitution
This part replaces 39923. Substitute parts can look different from the original.
In Stock
Label 183300
#20

Water heater diagram

Label

Part #183300

Replaced by #183300-000

?
Manufacturer substitution
This part replaces 183300. Substitute parts can look different from the original.
This item is not returnable
In Stock
Owner's Manual 183519
#NI

Water heater diagram

Owner's manual

Part #183519

Replaced by #183519-000

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Manufacturer substitution
This part replaces 183519. Substitute parts can look different from the original.
In Stock
Label 41259
#19

Water heater diagram

Label

Part #41259

Replaced by #041259-000

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Manufacturer substitution
This part replaces 41259. Substitute parts can look different from the original.
This item is not returnable
In Stock

Most common symptoms to help you fix your water heaters

Choose a symptom to see related water heater repairs.

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

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

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

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

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

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.

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.…

Easy DIY water heater repairs

Easy DIY water heater repairs

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

Water heater common questions

Water heater common questions

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