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AO Smith
Gas Water Heater

Model # GCNH50100 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith GCNH50100 water heater, as well as links to manuals and error code tables, if available.

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Error Codes

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ALL PARTS
Showing 10 of 19 parts  |
Control Valve 9006439005
#10

Water heater diagram

Control valve

Part #9006439005

$182.20 | 
6% OFF Phone Price : $194.20
In Stock
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
Ring 700795-021
#2

Water heater diagram

Ring

Part #700795-021

$16.25
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
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
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
Heat Trap 9003915015
#4

Water heater diagram

Heat trap

Part #9003915015

Replaced by #100108409

?
Manufacturer substitution
This part replaces 9003915015. Substitute parts can look different from the original.
$25.71
In Stock
Anode Rod 9003892005
#7

Water heater diagram

Anode rod

Part #9003892005

Replaced by #100109594

?
Manufacturer substitution
This part replaces 9003892005. Substitute parts can look different from the original.
$55.56
In Stock
Flue Baffle 9006437005
#3

Water heater diagram

Flue baffle

Part #9006437005

Replaced by #100111198

?
Manufacturer substitution
This part replaces 9006437005. Substitute parts can look different from the original.
$72.22
In Stock
Connector 9006449015
#14

Water heater diagram

Connector

Part #9006449015

Replaced by #100093865

?
Manufacturer substitution
This part replaces 9006449015. Substitute parts can look different from the original.
$27.78
In Stock

Most common symptoms to help you fix your water heaters

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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…

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

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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,…

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Why does my hot water smell like rotten eggs?

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

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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…

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

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

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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.

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Wiring schematic symbols explained video

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Easy DIY water heater repairs

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