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Parts List: A.O. Smith GCNH40100

  • Use the chart to find the part you need to order. A line art drawing is below the chart to assist you in locating your part.
  • Click on the underlined link to go directly to the part's page for pricing and ordering.
  • Part numbers that are no longer active in the AO Smith database are not included on the chart. In addition, some part numbers have changed to a new part number. Please see AO Smith New Part Cross Reference / Discontinued Part Guidelines for further assistance.
  • You can download and print the original PDF of the A.O. Smith parts list at the bottom of the page.


Item Description
7 Anode Rod 9003892005 (new # 100109594)
8+ Temperature & Pressure Relief Valve (Located Top or Side) 9000728015 new # 100108455)
10 Gas Control Valve / Thermostat 9006439005 (new # 100093862)
12 Pilot Assembly Kit (Natural Gas) 9006441005 (new # 100093864)
13 Burner/Door Assembly 9006443005 (new # 100093859)
14 Two Piece Wire Connector with Retaining Clip 9006449015 (new # 100093865)
16 Viewport Assembly 9006142015 new # 100093805)
17 Thermocouple 9000056015 new # 100108267)
18 Piezoelectric Ignitor Button 9006143015 new # 100110936)
20 20 in. Dia. Aluminum Drain Pan with Side Drain (optional) 23912-A (new # 100108459)
- The manufacturer may change part numbers and availability at any time.
+ Top T&P models use same parts indicated for standard models


Download original AO Smith Parts List
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