Gas Water Heater

Model # FCG75251 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith FCG75251 water heater, as well as links to manuals and error code tables, if available.

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Browse Parts for
FCG75251 Water Heaters
Restrictor 35405
#17

Water heater diagram

Restrictor

Part #35405

This item is not returnable
In Stock
Draft Hood 39072-4
#14

Water heater diagram

Draft hood

Part #39072-4

$24.49
20% OFF Phone Price : $30.49
In Stock
Inlet Tube 183512
#26

Water heater diagram

Inlet tube

Part #183512

Replaced by #100109784

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Manufacturer substitution
This part replaces 183512. 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
Burner Tube 181784
#3

Water heater diagram

Burner tube

Part #181784

Replaced by #181784-000

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Manufacturer substitution
This part replaces 181784. 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
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
Nipple 194139-1
#25

Water heater diagram

Nipple

Part #194139-1

Replaced by #100109450

?
Manufacturer substitution
This part replaces 194139-1. Substitute parts can look different from the original.
In Stock
Burner 181786-1
#2

Water heater diagram

Burner

Part #181786-1

Replaced by #181786-001

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Manufacturer substitution
This part replaces 181786-1. Substitute parts can look different from the original.
In Stock
Anode Rod 183523-36
#1

Water heater diagram

Anode rod

Part #183523-36

Replaced by #100109594

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Manufacturer substitution
This part replaces 183523-36. Substitute parts can look different from the original.
In Stock

Most common symptoms to help you fix your water heaters

Choose a symptom to see related water heater repairs.

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

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

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

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.

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.…

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.…

Easy DIY water heater repairs

Easy DIY water heater repairs

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