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AO Smith
Electric Water Heater

Model # ECL40 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith ECL40 water heater, as well as links to manuals and error code tables, if available.

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Error Codes

Model diagram and schematic

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Showing 10 of 25 parts  |
Element 042286-022
#6

Cabinet parts diagram

Element

Part #042286-022

Replaced by #100108290

?
Manufacturer substitution
This part replaces 042286-022. Substitute parts can look different from the original.
$33.33
In Stock
Thermostat 182359-000
#16

Cabinet parts diagram

Thermostat

Part #182359-000

Replaced by #100110039

?
Manufacturer substitution
This part replaces 182359-000. Substitute parts can look different from the original.
$28.89
In Stock
Box Cover 184660-000
#20

Cabinet parts diagram

Box cover

Part #184660-000

Replaced by #184660-000

?
Manufacturer substitution
This part replaces 184660-000. Substitute parts can look different from the original.
$17.99
In Stock
Anode Rod 183523-023
#9

Cabinet parts diagram

Anode rod

Part #183523-023

Replaced by #100109624

?
Manufacturer substitution
This part replaces 183523-023. Substitute parts can look different from the original.
$31.11
In Stock
Insulation 181639-003
#18

Cabinet parts 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
Dip Tube 183900-024
#2

Cabinet parts diagram

Dip tube

Part #183900-024

Replaced by #100108611

?
Manufacturer substitution
This part replaces 183900-024. Substitute parts can look different from the original.
$24.29
In Stock
Bracket 184608-000
#12

Cabinet parts diagram

Bracket

Part #184608-000

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

Terminal Cover 182360-000
#11

Cabinet parts diagram

Terminal cover

Part #182360-000

Replaced by #100109598

?
Manufacturer substitution
This part replaces 182360-000. Substitute parts can look different from the original.
$22.86
In Stock
Temperature Valve 043151-000
#10

Cabinet parts diagram

Temperature valve

Part #043151-000

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

Element 042286-021
#14

Cabinet parts diagram

Element

Part #042286-021

Replaced by #100108283

?
Manufacturer substitution
This part replaces 042286-021. Substitute parts can look different from the original.
$27.14
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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Why does my hot water smell like rotten eggs?

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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?

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Repair guides for electric water heaters

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How to replace a water heater element

How to replace a water heater element

If your water heater runs out of hot water quickly and one of the two heating elements has failed, replace the element f…

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Repair difficulty
Time required
 30 minutes or less
How to replace an electric water heater anode rod

How to replace an electric water heater anode rod

If your hot water begins to smell like rotten eggs, replace the anode rod with a zinc-aluminum anode rod following the i…

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Repair difficulty
Time required
 15 minutes or less
How to replace an electric water heater thermostat

How to replace an electric water heater thermostat

If the water temperature fluctuates or you don't get enough hot water, follow these instructions to replace your water h…

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Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your water heaters

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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.…

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Easy DIY water heater repairs

Easy DIY water heater repairs

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Water heater common questions

Water heater common questions

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

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