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AO Smith
Electric Water Heater

Model # ESM30 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith ESM30 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.

Error Codes

Model diagram and schematic

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Showing 10 of 24 parts  |
Owner's Manual 184639-000
#NI

Water heater diagram

Owner's manual

Part #184639-000

$9.99
In Stock
Terminal Cover 182117-001
#14

Water heater diagram

Terminal cover

Part #182117-001

Replaced by #100110879

?
Manufacturer substitution
This part replaces 182117-001. Substitute parts can look different from the original.
$21.43
In Stock
Element 042283-009
#5

Water heater diagram

Element

Part #042283-009

Replaced by #100108711

?
Manufacturer substitution
This part replaces 042283-009. Substitute parts can look different from the original.
$41.11
In Stock
Thermostat 182354-000
#12

Water heater diagram

Thermostat

Part #182354-000

Replaced by #100109846

?
Manufacturer substitution
This part replaces 182354-000. Substitute parts can look different from the original.
$53.33
In Stock
Box Cover 184660-000
#19

Water heater 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
Thermostat 182359-000
#15

Water heater 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
Bracket 184608-000
#11

Water heater diagram

Bracket

Part #184608-000

Replaced by #100108380

?
Manufacturer substitution
This part replaces 184608-000. Substitute parts can look different from the original.
$27.78
In Stock
Anode Rod 183523-019
#8

Water heater diagram

Anode rod

Part #183523-019

Replaced by #100109624

?
Manufacturer substitution
This part replaces 183523-019. Substitute parts can look different from the original.
$31.11
In Stock
Nipple 194130-007
#7

Water heater diagram

Nipple

Part #194130-007

Replaced by #9002564

?
Manufacturer substitution
This part replaces 194130-007. Substitute parts can look different from the original.
$19.19 | 
9% OFF Phone Price : $21.19
In Stock
Drain Valve 042037-004
#3

Water heater diagram

Drain valve

Part #042037-004

Replaced by #100108269

?
Manufacturer substitution
This part replaces 042037-004. Substitute parts can look different from the original.
$18.57
In Stock

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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

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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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