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AO Smith
Gas Water Heater

Model # GCV40 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith GCV40 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:

  • Click a diagram to see the parts shown on that diagram.
  • 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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For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual
Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 35 parts  |
Burner Tube 184823-000
#6

Water heater diagram

Burner tube

Part #184823-000

$20.49
In Stock
Burner Tube 184825-000
#6A

Water heater diagram

Burner tube

Part #184825-000

$20.49
In Stock
Outer Door 183458-000
#17

Water heater diagram

Outer door

Part #183458-000

Replaced by #100109299

?
Manufacturer substitution
This part replaces 183458-000. Substitute parts can look different from the original.
$35.56
In Stock
Restrictor 034894-000
#10

Water heater diagram

Restrictor

Part #034894-000

Replaced by #100110078

?
Manufacturer substitution
This part replaces 034894-000. Substitute parts can look different from the original.
$27.78
In Stock
Burner 183222-027
#NI

Water heater diagram

Burner

Part #183222-027

Replaced by #100109318

?
Manufacturer substitution
This part replaces 183222-027. Substitute parts can look different from the original.
$189.00
In Stock
Burner Head 183504-000
#4

Water heater diagram

Burner head

Part #183504-000

Replaced by #100109206

?
Manufacturer substitution
This part replaces 183504-000. Substitute parts can look different from the original.
$45.56
In Stock
2nd Anode 184634-114
#21

Water heater diagram

2nd anode

Part #184634-114

Replaced by #9004257005

?
Manufacturer substitution
This part replaces 184634-114. Substitute parts can look different from the original.
$20.51
| 
23% OFF Phone Price : $26.51
In Stock
Control Valve 182792-000
#11A

Water heater diagram

Control valve

Part #182792-000

Replaced by #100109219

?
Manufacturer substitution
This part replaces 182792-000. Substitute parts can look different from the original.
$336.67
In Stock
Natural Gas Orifice 181508-033
#5

Water heater diagram

Natural gas orifice

Part #181508-033

Replaced by #100109266

?
Manufacturer substitution
This part replaces 181508-033. Substitute parts can look different from the original.
$28.89
In Stock
Anode Rod 183523-026
#2

Water heater diagram

Anode rod

Part #183523-026

Replaced by #100109624

?
Manufacturer substitution
This part replaces 183523-026. Substitute parts can look different from the original.
$31.11
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: 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's pressure relief valve dripping water?

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

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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?

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

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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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How to read a wiring schematic video

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