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AO Smith GNR40100 water heater

AO Smith GNR40100 water heater Parts

Here are the diagrams and repair parts for AO Smith GNR40100 water heater, as well as links to manuals and error code tables, if available.

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Browse Parts for GNR40100 Water Heaters

  • Water Heater Anode Rod for AO Smith GNR40100 - Part 100109594

    Water heater diagram

    Anode Rod

    Part #9003892005

    Replaced by #100109594

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    Manufacturer substitution
    This part replaces 9003892005. Substitute parts can look different from the original.
    In Stock
    $102.74
    10% OFF Phone Price : $114.74Info Icon
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  • Water Heater Thermocouple for AO Smith GNR40100 - Part 100108267

    Water heater diagram

    Thermocouple

    Part #9000056015

    Replaced by #100108267

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    Manufacturer substitution
    This part replaces 9000056015. Substitute parts can look different from the original.
    In Stock
    $48.70
    11% OFF Phone Price : $54.70Info Icon
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  • K,manifold D for AO Smith GNR40100 - Part 100093859

    Water heater diagram

    Ao Smith Water Heater Burner Assembly

    Part #9006443005

    Replaced by #100093859

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    Manufacturer substitution
    This part replaces 9006443005. Substitute parts can look different from the original.
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    $533.39
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  • Water Heater Manifold Door Gasket for AO Smith GNR40100 - Part 100112699

    Water heater diagram

    Water Heater Manifold Door Gasket

    Part #9006141015

    Replaced by #100112699

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    Manufacturer substitution
    This part replaces 9006141015. Substitute parts can look different from the original.
    In Stock
    $72.13
    8% OFF Phone Price : $78.13Info Icon
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  • Water Heater Manifold Wire Connector for AO Smith GNR40100 - Part 100093865

    Water heater diagram

    Connector

    Part #9006449015

    Replaced by #100093865

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    Manufacturer substitution
    This part replaces 9006449015. Substitute parts can look different from the original.
    In Stock
    $53.73
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  • Water Heater Dip Tube for AO Smith GNR40100 - Part 100111192

    Water heater diagram

    Dip Tube

    Part #9006431005

    Replaced by #100111192

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    Manufacturer substitution
    This part replaces 9006431005. Substitute parts can look different from the original.
    In Stock
    $55.89
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  • State Water Heater Gas Control Valve for AO Smith GNR40100 - Part 100093863

    Water heater diagram

    Control Valve

    Part #9006440005

    Replaced by #100093863

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    Manufacturer substitution
    This part replaces 9006440005. Substitute parts can look different from the original.
    In Stock
    $337.27
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  • Water Heater Vent Draft Hood for AO Smith GNR40100 - Part 100111362

    Water heater diagram

    Drafthood

    Part #700795-020

    Replaced by #100111362

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    Manufacturer substitution
    This part replaces 700795-020. Substitute parts can look different from the original.
    In Stock
    $66.62
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  • Water Heater Pilot Igniter for AO Smith GNR40100 - Part 100110936

    Water heater diagram

    Water Heater Pilot Igniter

    Part #9006143015

    Replaced by #100110936

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    Manufacturer substitution
    This part replaces 9006143015. Substitute parts can look different from the original.
    In Stock
    $61.91
    9% OFF Phone Price : $67.91Info Icon
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  • Water Heater Heat Trap Nipple Kit for AO Smith GNR40100 - Part 100108409

    Water heater diagram

    Heat Trap

    Part #9003915015

    Replaced by #100108409

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    Manufacturer substitution
    This part replaces 9003915015. Substitute parts can look different from the original.
    In Stock
    $38.69
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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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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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