AO Smith
Electric Water Heater

Model #ECT80 AO Smith water heater

Here are the diagrams and repair parts for AO Smith ECT80 water heater, as well as links to manuals and error code tables, if available.

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Error Codes

    Showing 10 of 23 parts

    Water Heater Heating Element#6

    Water heater Diagram

    Element

    Part #042286-022
    Replaced by #9000095015
    ?
    Manufacturer substitution
    This part replaces 042286-022. Substitute parts can look different from the original.
    BEST SELLER
    In Stock
    $35.99
    Temperature Valve#10

    Water heater Diagram

    Temperature valve

    Part #043151-000

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

    Water Heater Thermostat#13

    Water heater Diagram

    Thermostat

    Part #182354-000
    Replaced by #9004428115
    ?
    Manufacturer substitution
    This part replaces 182354-000. Substitute parts can look different from the original.
    In Stock
    $46.79
    Water Heater Heating Element Gasket#7

    Water heater Diagram

    Gasket

    Part #0005300370
    Replaced by #9000308005
    ?
    Manufacturer substitution
    This part replaces 0005300370. Substitute parts can look different from the original.
    In Stock
    $44.89
    Water Heater Thermostat, Lower#16

    Water heater Diagram

    Thermostat

    Part #182359-000
    Replaced by #9004714115
    ?
    Manufacturer substitution
    This part replaces 182359-000. Substitute parts can look different from the original.
    In Stock
    $26.20
    Water Heater Heating Element#14

    Water heater Diagram

    Element

    Part #042286-021
    Replaced by #9000092015
    ?
    Manufacturer substitution
    This part replaces 042286-021. Substitute parts can look different from the original.
    This item is not returnable
    Back Order
    $25.69
    Terminal Cover#11

    Water heater Diagram

    Terminal cover

    Part #182360-000
    Replaced by #9003899015
    ?
    Manufacturer substitution
    This part replaces 182360-000. Substitute parts can look different from the original.
    In Stock
    $28.94
    Box Cover#20

    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.
    In Stock
    $17.99
    Water Heater Access Panel#1

    Water heater Diagram

    Access panel

    Part #181260-000
    Replaced by #9003900005
    ?
    Manufacturer substitution
    This part replaces 181260-000. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $17.66
    Water Heater Thermostat Bracket#12

    Water heater Diagram

    Bracket

    Part #184608-000
    Replaced by #9000309
    ?
    Manufacturer substitution
    This part replaces 184608-000. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $17.79

    Symptoms common to all 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 failure, bad thermocouple
    Main causes: water supply needs chlorine treatment, anode rod too reactive
    Main causes: thermostats need adjustment, water heater capacity too low, bad heating element, thermostat failure, excessive tank sediment
    Main causes: thermostat temperature set too high, thermostats need adjustment, faulty thermostat, shorted heating element
    Main causes: faulty pressure relief valve, water is overheating
    Main causes: broken heating element, thermostat failure, excessive tank sediment, tank size too small, burner valve assembly failure
    Main causes: loose water pipe fittings, leaky drain valve, bad temperature-pressure relief valve, leaky heating element, cracked tank

    Repair guides for electric water heaters

    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 heater's thermostat.

    Repair difficulty
    Time required
     30 minutes or less
    How to replace an electric water heater heating element

    If your water heater runs out of hot water quickly and one of the two heating elements has failed, replace the element following these step-by-step instructions.

    Repair difficulty
    Time required
     30 minutes or less
    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

    Articles and videos common to all water heaters

    Use the advice and tips in these articles and videos to get the most out of your water heater.

    August 18, 2021

    Wiring schematic symbols explained video

    By Sears PartsDirect staff

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

    April 10, 2020

    Cleaning your appliances after a drinking water advisory

    By Julie Riebe

    Find out how to clean and flush household appliances once a boil water advisory is lifted.

    August 1, 2015

    Easy DIY water heater repairs

    By Sears PartsDirect staff

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