AO Smith
Electric Water Heater

Model #EES80T920 AO Smith water heater

Here are the diagrams and repair parts for AO Smith EES80T920 water heater, as well as links to manuals and error code tables, if available.

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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

    Showing 10 of 42 parts

    Water Heater Anode Rod#1

    Water heater Diagram

    Anode,alum

    Part #183523-33
    Replaced by #9003892005
    ?
    Manufacturer substitution
    This part replaces 183523-33. Substitute parts can look different from the original.
    BEST SELLER
    Back Order
    $37.99 | 
    12% OFF 
    Phone Price: $42.99
    Water Heater Temperature and Pressure Relief Valve#NI

    Water heater Diagram

    T & p valve

    Part #23740-1
    Replaced by #9000071015
    ?
    Manufacturer substitution
    This part replaces 23740-1. Substitute parts can look different from the original.
    BEST SELLER
    Back Order
    $7.79 | 
    11% OFF 
    Phone Price: $8.79
    Water Heater Anode Rod

    See All Related Diagrams

    Anode rod

    Part #183463-29
    Replaced by #9003721
    ?
    Manufacturer substitution
    This part replaces 183463-29. Substitute parts can look different from the original.
    BEST SELLER
    In Stock
    $23.19 | 
    18% OFF 
    Phone Price: $28.19
    Water Heater Heating Element Gasket#6

    Water heater Diagram

    Gasket

    Part #42537
    Replaced by #9000308005
    ?
    Manufacturer substitution
    This part replaces 42537. Substitute parts can look different from the original.
    BEST SELLER
    In Stock
    $16.21 | 
    18% OFF 
    Was: $19.69
    Water Heater Thermostat#15

    Water heater Diagram

    Thermostat

    Part #182499
    Replaced by #9004428115
    ?
    Manufacturer substitution
    This part replaces 182499. Substitute parts can look different from the original.
    In Stock
    $46.79 | 
    10% OFF 
    Phone Price: $51.79
    Water Heater Thermostat#15A

    Water heater Diagram

    Upper thermo

    Part #182354
    Replaced by #9004428115
    ?
    Manufacturer substitution
    This part replaces 182354. Substitute parts can look different from the original.
    In Stock
    $46.79 | 
    10% OFF 
    Phone Price: $51.79
    Label#26

    Water heater Diagram

    Label

    Part #160418
    Replaced by #160418-000
    ?
    Manufacturer substitution
    This part replaces 160418. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.16
    Inlet Tube#18

    Water heater Diagram

    Inlet tube

    Part #183350-49
    Replaced by #183350-049
    ?
    Manufacturer substitution
    This part replaces 183350-49. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $4.49
    Collar#3

    Water heater Diagram

    Collar

    Part #20172-21
    Replaced by #9004610115
    ?
    Manufacturer substitution
    This part replaces 20172-21. Substitute parts can look different from the original.
    In Stock
    $15.99
    Insert#8

    Water heater Diagram

    Insert

    Part #183360
    Replaced by #183360-000
    ?
    Manufacturer substitution
    This part replaces 183360. Substitute parts can look different from the original.
    In Stock
    $16.49

    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

    November 20, 2022
    By Lyle Weischwill
    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 following these step-by-step instructions.

    Repair difficulty
    Time required
     30 minutes or less
    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 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.

    October 24, 2022

    Easy DIY appliance repairs that anyone can do

    By Lyle Weischwill

    Get advice on simple DIY fixes for appliances that you can safely do on your own.

    August 18, 2021

    Wiring schematic symbols explained video

    By Lyle Weischwill

    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.