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AO Smith
Gas Water Heater

Model # PGC75243 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith PGC75243 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:

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  • 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”.

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Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 21 parts  |
Restrictor 35405
#16

Water heater diagram

Restrictor

Part #35405

This item is not returnable
$3.05
In Stock
Inner Door 39923
#11

Water heater diagram

Inner door

Part #39923

Replaced by #100109442

?
Manufacturer substitution
This part replaces 39923. Substitute parts can look different from the original.
$30.00
In Stock
Tube 1417-60
#17

Water heater diagram

Tube

Part #1417-60

Replaced by #100109617

?
Manufacturer substitution
This part replaces 1417-60. Substitute parts can look different from the original.
$43.33
In Stock
Inlet Tube 183512
#8

Water heater diagram

Inlet tube

Part #183512

Replaced by #100109784

?
Manufacturer substitution
This part replaces 183512. Substitute parts can look different from the original.
$76.67
In Stock
Owner's Manual 183519
#NI

Water heater diagram

Owner's manual

Part #183519

Replaced by #183519-000

?
Manufacturer substitution
This part replaces 183519. Substitute parts can look different from the original.
$9.49
In Stock
Thermocouple 23675
#4

Water heater diagram

Thermocouple

Part #23675

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

Brace 194309
#7

Water heater diagram

Brace

Part #194309

Replaced by #100109445

?
Manufacturer substitution
This part replaces 194309. Substitute parts can look different from the original.
$28.89
In Stock
Orifice,pg 181778-38
#18

Water heater diagram

Orifice,pg

Part #181778-38

Replaced by #9004105015

?
Manufacturer substitution
This part replaces 181778-38. Substitute parts can look different from the original.
$15.49
In Stock
Burner Tube 39114-1
#2

Water heater diagram

Burner tube

Part #39114-1

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

Nipple 43879-1
#1

Water heater diagram

Nipple

Part #43879-1

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

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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…

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Why is my water heater making the water too hot?

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