Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
AO Smith
Gas Water Heater

Model # FCV40 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith FCV40 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”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

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

Error Codes

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 33 parts  |
Pilot Assembly 183824-172
#5A

Water heater diagram

Pilot assembly

Part #183824-172

Replaced by #100109253

?
Manufacturer substitution
This part replaces 183824-172. Substitute parts can look different from the original.
$140.00
In Stock
Outer Door 183458-000/23
#16

Water heater diagram

Outer door

Part #183458-000/23

Replaced by #100109299

?
Manufacturer substitution
This part replaces 183458-000/23. Substitute parts can look different from the original.
$35.56
In Stock
Drain Pan 23914-A
#25B

Water heater diagram

Drain pan

Part #23914-A

Replaced by #100108615

?
Manufacturer substitution
This part replaces 23914-A. Substitute parts can look different from the original.
$92.22
In Stock
Burner 183504-FV
#2

Water heater diagram

Burner

Part #183504-FV

Replaced by #100109206

?
Manufacturer substitution
This part replaces 183504-FV. Substitute parts can look different from the original.
$45.56
In Stock
Orifice 181508-33-FV
#3

Water heater diagram

Orifice

Part #181508-33-FV

Replaced by #100109266

?
Manufacturer substitution
This part replaces 181508-33-FV. Substitute parts can look different from the original.
$28.89
In Stock
Inlet Tube 183776-40
#12

Water heater diagram

Inlet tube

Part #183776-40

Replaced by #100108854

?
Manufacturer substitution
This part replaces 183776-40. Substitute parts can look different from the original.
$31.11
In Stock
Glass View 183568-000
#22

Water heater diagram

Glass view

Part #183568-000

Replaced by #100109224

?
Manufacturer substitution
This part replaces 183568-000. Substitute parts can look different from the original.
$34.44
In Stock
Orifice 181791-51-FV
#3A

Water heater diagram

Orifice

Part #181791-51-FV

Replaced by #100109241

?
Manufacturer substitution
This part replaces 181791-51-FV. Substitute parts can look different from the original.
$31.11
In Stock
Gas Valve 182791-4
#13

Water heater diagram

Gas valve

Part #182791-4

Replaced by #100109217

?
Manufacturer substitution
This part replaces 182791-4. Substitute parts can look different from the original.
$229.09
In Stock
Insulation 183162
#2A

Water heater diagram

Insulation

Part #183162

Replaced by #100109214

?
Manufacturer substitution
This part replaces 183162. Substitute parts can look different from the original.
$31.11
In Stock

Most common symptoms to help you fix your water heaters

Choose a symptom to see related water heater repairs.

View all

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…

Read more

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,…

Read more

Why does my hot water smell like rotten eggs?

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

Read more

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…

Read more

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

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

Read more

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…

Read more

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…

Read more

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.

View all
How to read a wiring schematic video

How to read a wiring schematic video

Learn how to decipher symbols so you can buy the right part for your problem.…

Read more
Easy DIY water heater repairs

Easy DIY water heater repairs

Read about some water heater repairs that you can easily do yourself.…

Read more
Water heater common questions

Water heater common questions

These common questions and answers can help you make the most of your water heater.…

Read more

Parts & More