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AO Smith
Gas Water Heater

Model # GCVT40L Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith GCVT40L water heater, as well as links to manuals and error code tables, if available.

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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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For DIY troubleshooting advice and repair guides, visit our repair help section.

Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 34 parts  |
Drain Pan 23912-A
#26

Water heater diagram

Drain pan

Part #23912-A

Replaced by #100108459

?
Manufacturer substitution
This part replaces 23912-A. Substitute parts can look different from the original.
$63.33
In Stock
Burner Tube 183163-002
#6

Water heater diagram

Burner tube

Part #183163-002

Replaced by #9003635005

?
Manufacturer substitution
This part replaces 183163-002. Substitute parts can look different from the original.
$66.49
In Stock
Pilot Assembly 183824-190
#19

Water heater diagram

Pilot assembly

Part #183824-190

Replaced by #9003542

?
Manufacturer substitution
This part replaces 183824-190. Substitute parts can look different from the original.
$65.53 | 
8% OFF Phone Price : $71.53
In Stock
Restrictor 035405-000
#10

Water heater diagram

Restrictor

Part #035405-000

Replaced by #100109288

?
Manufacturer substitution
This part replaces 035405-000. Substitute parts can look different from the original.
$33.33
In Stock
Burner Tube 183450-002
#6A

Water heater diagram

Burner tube

Part #183450-002

Replaced by #9003644005

?
Manufacturer substitution
This part replaces 183450-002. Substitute parts can look different from the original.
$33.99
In Stock
Orifice 181791-046
#5A

Water heater diagram

Orifice

Part #181791-046

Replaced by #9003643005

?
Manufacturer substitution
This part replaces 181791-046. Substitute parts can look different from the original.
$18.99
In Stock
Insulation 181639-003
#NI

Water heater diagram

Insulation

Part #181639-003

Replaced by #9003971005

?
Manufacturer substitution
This part replaces 181639-003. Substitute parts can look different from the original.
$21.99
In Stock
Drain Pan 23913-A
#26A

Water heater diagram

Drain pan

Part #23913-A

Replaced by #100108616

?
Manufacturer substitution
This part replaces 23913-A. Substitute parts can look different from the original.
$64.44
In Stock
Screen 183159-000
#1

Water heater diagram

Screen

Part #183159-000

Replaced by #100109216

?
Manufacturer substitution
This part replaces 183159-000. Substitute parts can look different from the original.
$22.86
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

Most common symptoms to help you fix your water heaters

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Why isn't my water heater heating my water?

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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 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?

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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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