Jupiter Heating.com

Directory: Catalog > Water Heaters > A.O. Smith > Parts

Parts List: A.O. Smith GB-2500, GW-2500; Series 400 / 405

  • 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  • Part numbers that are no longer active in the AO Smith database are not included on the chart.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.

 

Combustion Chamber Assembly Components:

Item Description GB/GW-2500
Series 400/405
2 Blower Assembly, Large 211096 (new # 100110413) (qty. 3)
4 Bracket, Gas Manifold 210780 (new # 100110688) (qty. 7)
5 Burner, 60mm 210757 (new # 100110710) (qty. 22)
6 Burner Assembly 211306 (new # 100110692) (qty. 3)
8 Control Panel 210740-5 (new # 100061498)
9 Flame Sensor 192682 (new # 100109908) (qty. 4)
13 Gas Train, 4 & 5 Burner - Natural Gas 211081 (new # 100110412) (qty. 3)
15 Gasket, Blower 210775 (new # 100061533) (qty. 3)
17 Gasket, Burner 210774 (new # 100110730)
19 Gasket, Heat Exchanger (qty. 2) 210779 (new # 100061541)
20 Gasket, Ignitor 210078 (new # 100110748) (qty. 2)
21 Gasket, Observation Port 211297 (new # 100062421)
24 Igniter 192334 (new # 100110899) (qty. 2)
27 Main Gas Manifold 210756-5 (new # 100061521)
29 Manifold Assembly, 3 Burner 210761 (new # 100111819) (qty. 2)
31 Mainfold Assembly, 5 Burner 210763 (new # 100061529)
32 Nut, Hex Serrated Flange 210226 (new # 100060814) (qty. 12)
34 Observation Port Assembly (qty. 2) 98760 (new # 100110431)
35 Orifice - Natural Gas 210758-111 (new # 100061527) (qty. 25)
36 Orifice - Propane 210758-75 (new # 100061524) (qty. 25)
39 Panel, Air Diverter 211080 (new # 100061931) (qty. 3)
40 Panel, Front Combustion 210703-5 (new # 100061398)
41 Panel, Side Air Chamber 211088 (new # 100061948)
52 Strain Relief 210173 (new # 100060707) (qty. 3)
54 Switch, Blocked Flue 210908-2 (new # 100110589)
55 Switch, Differential 211094 (new # 100110001) (qty. 3)
56 Switch, Differential - Propane 211094-1 (new # 100110001) (qty. 3)
57 Switch, Low Gas - Natural Gas 191149-1 (new # 100109151)
57 Switch, Low Gas - Propane 191149-3 (new # 100109151)
NOTES:
- The manufacturer may change part numbers and availability at any time.
+ Items not illustrated
- CSD-1 and IRI models substitue the following part numbers for the Gas Train Assemblies: Item 11 substitute with 211082-2; Item 12 substitute with 211082-3; Item 13 substitute with 211081-2; Item 14 substitute with 211081-3.

 

 

Jacket Assembly Components:

Item Description GB/GW-2500
Series 400/405
1 User Interface, Display 211762 (new # 100111940)
5 Gasket,Conduit (qty. 2) 211266 (new # 100062378)
9 Handle, Front Panel 191802 (new # 100050134) (qty. 2)
11 Junction Box (qty. 2) 190438-4 (new # 100049309)
12 Locknut, Star (qty. 2) 1953 (new # 100003894)
23 Panel, Top Jacket 210733-5 (new # 100061467)
34 Valve, Ball 2-1/2 x 2-1/2 69022-3 (new # 100027027)
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

Water Heater Connections:

Item Description GB-2500 or GW-2500
1 Flow Switch Conduit Assembly 211156 (new # 100062035)
2 Inlet Temp. Conduit Assembly 210180-1 (new # 100060723)
3 Low Water Cutoff 210376 (new # 100061018)
5 Outlet Conduit Assembly 210181-1 (new # 100060728)
8 Relief Valve - 125 PSI (GW-2500) 98883-7 (new # 100110427)
9 Relief Valve - 50 PSI (GB-2500) 210451-3 (new # 100111924)
11+ Tank Probe (GW-2500) 210211-1 (new # 100109985)
NOTES:
- The manufacturer may change part numbers and availability at any time.
+ Item not illustrated.

 

 

Control Box Assembly:

Item Description GB/GW--2500 or GB/GW-2500 IRI
3 Central Control Board (CCB) 211758 (new # 100111255)
4 Flame Control Board (FCB) 211759 (new # 100111256) (qty. 3)
5 Relay, 120-Volt 211546 (new # 100111329)
5 Relay, 120-Volt 211546 (new # 100111329) (qty. 2)
9 Power Distribution Board (PDB) 211760-000 (new # 100111904)
11 Transformer, 250 VA 211673 (new # 100111942)
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

 

Wire Harness:

Item Description GB/GW-2500
Series 400/405
7 Harness, Gas Valve Relay Power 211951-001 (new # 100063640)
9 Harness, Communication (qty. 2) 100063642
20 Harness, Tank Probe 100063654
23 Harness, 24 VAC Output 211951-001 (new # 100063640)
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

 

 

 

IRI/CSD-1 Components:

Item Description GB/GW-2500
Series 400/405
3 High Pressure Switch - Natural Gas 192527-1 (new # 100109902) (qty. 7)
3 High Pressure Switch - Propane 192527 (new # 100109901) (qty. 7)
4 Main Manual Shut-Off 69022-3 (new # 100027027)
5 Pilot Shut-Off Valve 200683 (new # 100059254)
NOTES:
- The manufacturer may change part numbers and availability at any time.
- CSD-1 and IRI models substitute the following part numbers for the Gas Train Assemblies: Item 11 substitute with 211082-2; Item 12 substitute with 211082-3; Item 13 substitute with 211081-2; Item 14 substitute with 211081-3.

 

 

Download original AO Smith Parts List
(Use the back arrow to return to this page, or open the PDF in a new tab.)