AO Smith
Gas Water Heater

Model #PGC100242 Official AO Smith water heater

Here are the diagrams and repair parts for AO Smith PGC100242 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 21 parts

    Valve#13

    Water heater Diagram

    Valve

    Part #180193-5

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

    Water Heater Pilot Tube Assembly#17

    Water heater Diagram

    Tube

    Part #1417-60
    Replaced by #9003925115
    ?
    Manufacturer substitution
    This part replaces 1417-60. Substitute parts can look different from the original.
    In Stock
    $27.49 | 
    15% OFF 
    Phone Price: $32.49
    Restrictor#16

    Water heater Diagram

    Restrictor

    Part #35405
    This item is not returnable
    In Stock
    $3.05
    Inner Door#11

    Water heater Diagram

    Inner door

    Part #39923
    Replaced by #9003735005
    ?
    Manufacturer substitution
    This part replaces 39923. Substitute parts can look different from the original.
    In Stock
    $19.72
    Shutter#19

    Water heater Diagram

    Shutter

    Part #35376-1
    Replaced by #035376-001
    ?
    Manufacturer substitution
    This part replaces 35376-1. Substitute parts can look different from the original.
    In Stock
    $8.99
    Owner's Manual#NI

    Water heater Diagram

    Owner's manual

    Part #183519
    Replaced by #183519-000
    ?
    Manufacturer substitution
    This part replaces 183519. Substitute parts can look different from the original.
    In Stock
    $9.49
    Draft Hood#6

    Water heater Diagram

    Draft hood

    Part #39072-200
    Replaced by #9004236205
    ?
    Manufacturer substitution
    This part replaces 39072-200. Substitute parts can look different from the original.
    In Stock
    $56.99
    Burner#5

    Water heater Diagram

    Pilot

    Part #160228
    Replaced by #9004339115
    ?
    Manufacturer substitution
    This part replaces 160228. Substitute parts can look different from the original.
    In Stock
    $60.49
    Burner#3

    Water heater Diagram

    Burner

    Part #41157-8
    Replaced by #9004089005
    ?
    Manufacturer substitution
    This part replaces 41157-8. Substitute parts can look different from the original.
    In Stock
    $83.49
    Thermocouple#4

    Water heater Diagram

    Thermocouple

    Part #23675

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

    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

    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.