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AO Smith ECRT40 water heater

AO Smith ECRT40 water heater Parts

Here are the diagrams and repair parts for AO Smith ECRT40 water heater, as well as links to manuals and error code tables, if available.

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Browse Parts for ECRT40 Water Heaters

  • Water Heater Heating Element for AO Smith ECRT40 - Part 100108290

    Cabinet parts diagram

    Element

    Part #042285-025

    Replaced by #100108290

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    Manufacturer substitution
    This part replaces 042285-025. Substitute parts can look different from the original.
    In Stock
    $58.68
    9% OFF Phone Price : $64.68Info Icon
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  • Water Heater Heating Element for AO Smith ECRT40 - Part 100108283

    Cabinet parts diagram

    Element

    Part #042286-021

    Replaced by #100108283

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    Manufacturer substitution
    This part replaces 042286-021. Substitute parts can look different from the original.
    Check Availability
    $44.69
    12% OFF Phone Price : $50.69Info Icon
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  • Water Heater Thermostat, Lower for AO Smith ECRT40 - Part 100110039

    Cabinet parts diagram

    Thermostat

    Part #182359-000

    Replaced by #100110039

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    Manufacturer substitution
    This part replaces 182359-000. Substitute parts can look different from the original.
    In Stock
    $56.17
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  • Water Heater Access Panel, Lower for AO Smith ECRT40 - Part 100109599

    Cabinet parts diagram

    Access Panel

    Part #181260-000

    Replaced by #100109599

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    Manufacturer substitution
    This part replaces 181260-000. Substitute parts can look different from the original.
    In Stock
    $47.87
    11% OFF Phone Price : $53.87Info Icon
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  • Nipple for AO Smith ECRT40 - Part 184633-001

    Cabinet parts diagram

    Nipple

    Part #184633-001

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

  • K,personnel for AO Smith ECRT40 - Part 100110879

    Cabinet parts diagram

    Terminal Cover

    Part #182117-001

    Replaced by #100110879

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    Manufacturer substitution
    This part replaces 182117-001. Substitute parts can look different from the original.
    In Stock
    $32.24
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  • K,dip Tube,p for AO Smith ECRT40 - Part 100108609

    Cabinet parts diagram

    Dip Tube

    Part #183900-052

    Replaced by #100108609

    Info Icon
    Manufacturer substitution
    This part replaces 183900-052. Substitute parts can look different from the original.
    In Stock
    $58.02
    Minus Item
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    Plus Item
  • Water Heater Anode Rod for AO Smith ECRT40 - Part 100109624

    Cabinet parts diagram

    Anode Rod

    Part #183523-029

    Replaced by #100109624

    Info Icon
    Manufacturer substitution
    This part replaces 183523-029. Substitute parts can look different from the original.
    Check Availability
    $60.20
    9% OFF Phone Price : $66.20Info Icon
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  • K,personnel for AO Smith ECRT40 - Part 100109598

    Cabinet parts diagram

    Terminal Cover

    Part #182360-000

    Replaced by #100109598

    Info Icon
    Manufacturer substitution
    This part replaces 182360-000. Substitute parts can look different from the original.
    In Stock
    $41.38
    Minus Item
    Qty
    Plus Item
  • Relief Valve for AO Smith ECRT40 - Part 100108600

    Cabinet parts diagram

    Relief Valve

    Part #043151-004

    Replaced by #100108600

    Info Icon
    Manufacturer substitution
    This part replaces 043151-004. Substitute parts can look different from the original.
    In Stock
    $72.38
    Minus Item
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Most common symptoms to help you fix your water heaters

Choose a symptom to see related water heater repairs.

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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 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 making the water too hot?

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

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Why is there water in my water heater's drain pan?

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

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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?

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

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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 time and Difficulty

 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.…

Read more

Repair time and Difficulty

 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…

Read more

Repair time and Difficulty

 30 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.

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Quiz: Are you abusing your appliances?

Quiz: Are you abusing your appliances?

Take our quiz to see how well you treat your appliances. Then, find out what you can do to help them last longer.…

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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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Easy DIY water heater repairs

Easy DIY water heater repairs

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

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