AO Smith
Electric Water Heater

Model # ECS30 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith ECS30 water heater, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 24 parts  |

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

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.
In Stock
Insulation 183256-000
#17

Cabinet parts diagram

Insulation

Part #183256-000

Replaced by #9003716005

?
Manufacturer substitution
This part replaces 183256-000. Substitute parts can look different from the original.
In Stock
Terminal Cover 182117-001
#15

Cabinet parts diagram

Terminal cover

Part #182117-001

Replaced by #100110879

?
Manufacturer substitution
This part replaces 182117-001. Substitute parts can look different from the original.
In Stock
Dip Tube 183900-028
#2

Cabinet parts diagram

Dip tube

Part #183900-028

Replaced by #9003667005

?
Manufacturer substitution
This part replaces 183900-028. Substitute parts can look different from the original.
In Stock
Bracket 184608-000
#12

Cabinet parts diagram

Bracket

Part #184608-000

Replaced by #100108380

?
Manufacturer substitution
This part replaces 184608-000. Substitute parts can look different from the original.
In Stock
Element 042286-023
#6

Cabinet parts diagram

Element

Part #042286-023

Replaced by #9001879005

?
Manufacturer substitution
This part replaces 042286-023. Substitute parts can look different from the original.
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.
In Stock
Spacer 184011-000
#3

Cabinet parts diagram

Spacer

Part #184011-000

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

Drain Pan 9002844
#22B

Cabinet parts diagram

Drain pan

Part #9002844

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

Most common symptoms to help you fix your water heaters

Choose a symptom to see related water heater repairs.

Main causes: lack of power, no gas supply, thermostat limit switch tripped, bad element, bad thermostat, gas valve failu…

Main causes: thermostats need adjustment, water heater capacity too low, bad heating element, thermostat failure, excess…

Main causes: loose water pipe fittings, leaky drain valve, bad temperature-pressure relief valve, leaky heating element,…

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

Main causes: broken heating element, thermostat failure, excessive tank sediment, tank size too small, burner valve asse…

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

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

Repair guides for electric water heaters

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…

Repair difficulty
Time required
 30 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…

Repair difficulty
Time required
 30 minutes or less
How to replace a water heater temperature and pressure (T&P) relief valve

How to replace a water heater temperature and pressure (T&P) relief valve

Replace a broken temperature/pressure (T&P) relief valve on an electric water heater using these instructions.…

Repair difficulty
Time required
 15 minutes or less

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.

Wiring schematic symbols explained video

Wiring schematic symbols explained video

Learn some of the most common symbols found in a wiring diagram and what they mean.…

Using a wiring schematic to trace a current video

Using a wiring schematic to trace a current video

Find out what’s wrong with your appliance by following a circuit.…

Easy DIY water heater repairs

Easy DIY water heater repairs

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