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AO Smith
Gas Water Heater

Model # GNR40100 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith GNR40100 water heater, as well as links to manuals and error code tables, if available.

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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 19 parts  |
Water Heater Manifold Door Gasket 9006141015
#15

Water heater diagram

Water heater manifold door gasket

Part #9006141015

This item is not returnable
$25.49 | 
19% OFF Phone Price : $31.49
In Stock
Ao Smith Flue Baffle 9006436005
#3

Water heater diagram

Ao smith flue baffle

Part #9006436005

$51.49
In Stock
Ring 700795-021
#2

Water heater diagram

Ring

Part #700795-021

$16.25
In Stock
View Port 9006142015
#16

Water heater diagram

View port

Part #9006142015

Replaced by #9006142015

?
Manufacturer substitution
This part replaces 9006142015. Substitute parts can look different from the original.
$17.99
In Stock
Dip Tube 9006431005
#6

Water heater diagram

Dip tube

Part #9006431005

Replaced by #100111192

?
Manufacturer substitution
This part replaces 9006431005. Substitute parts can look different from the original.
$28.89
In Stock
Temperature Valve 9000728015
#8

Water heater diagram

Temperature valve

Part #9000728015

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

Ao Smith Water Heater Burner Assembly 9006443005
#13

Water heater diagram

Ao smith water heater burner assembly

Part #9006443005

Replaced by #100093859

?
Manufacturer substitution
This part replaces 9006443005. Substitute parts can look different from the original.
$341.67
In Stock
Water Heater Pilot Igniter (replaces 6910430, 9006143) 9006143015
#NI

Water heater diagram

Water heater pilot igniter (replaces 6910430, 9006143)

Part #9006143015

Replaced by #100110936

?
Manufacturer substitution
This part replaces 9006143015. Substitute parts can look different from the original.
$32.22
In Stock
Thermocouple 9000056015
#NI

Water heater diagram

Thermocouple

Part #9000056015

Replaced by #100108267

?
Manufacturer substitution
This part replaces 9000056015. Substitute parts can look different from the original.
$28.57
In Stock
Drafthood 700795-020
#1

Water heater diagram

Drafthood

Part #700795-020

Replaced by #100111362

?
Manufacturer substitution
This part replaces 700795-020. Substitute parts can look different from the original.
$34.44
In Stock

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

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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…

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