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Parts List: A.O. Smith GB-500, GW-500; Series 400 / 401 / 402 / 403

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  • Part numbers that are no longer active in the AO Smith database are not included on the chart.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 GB/GW-500
Series 400/101/402/403
8 Panel - Front Combustion Chamber 211863-2 (new # 100063417)
10 Panel - Right Combustion 211914 (new # 100063550)
12 Panel - Rear Combustion Chamber 211861-2 (new # 100063407)
13A Burner Assembly 211941 (new # 100111824)
13B Burner Assembly 211941-9 (new # 100111824)
14 Insert - Side Jacket (qty. 2) 212029 (new # 100063722)
15 User Interface Module 211762 (new # 100111940)
16 Combustion Insert - Left 211853 (new # 100063379)
17 Combustion Insert - Right 211853-1 (new # 100063380)
19 Flame Sensor 192682 (new # 100109908)
20 Ignitor 192334 (new # 100110899)
22 Gasket - Ignitor 210078 (new # 100110748)
25 Baffle - Tube (qty. 7) 192772-9 (new # 100050941)
29 Panel - Top Combustion 211862-2 (new 100063412)
31 Transformer 210449 (new # 100111982)
33 Gasket (qty. 2) 192780 (new # 100050950)
37 Jacket - Right Side Panel 211881 (new # 100063465)
42 Gasket - Sight Glass 211866 (new # 100063422)
43 Plate - Sight Glass 210166 (new # 100110682)
46 Pump/Flow Switch Conduit Assembly 210179-2 (new # 100060717)
46 Flow Switch Conduit Assembly 210179-3 (new # 100060718)
47 Inlet Temp. Conduit Assembly 210180 (new # 100110731)
48 ECO/Outlet Temp. Conduit Assembly 210181 (new # 100110727)
49 Switch - Rocker 191665 (new # 100109882)
50 Junction Box 93558 (new # 100110255)
55 Port - Observation (qty. 2) 191572-1 (new # 100049890)
56 Gasket - Port 191576-1 (new # 100049896)
60 Flow Switch 211480 (new # 100110588)
61 Gasket - Gas Manifold Plate (qty. 2) 211930 (new # 100063566)
65 Nipple - Pipe 3/4 in. x 3 in. (Brass) 20373-2 (new # 100006024)
65 Nipple - Pipe 3/4 in. x 3 in. (Galv.) 200645 (new # 100110312)
66 Nipple - Pipe 3/4 in. x Close (Galv.) (qty. 2) 200645 (new # 100110312)
67 Elbow - 3/4 in. 90 (Brass) (qty. 2) 191664 (new # 100049989)
69 Pressure Relief Valve (GB model) 210451 (new # 100111921)
70 Strain Relief Fitting 210173 (new # 100060707)
73 Flame Control Board 211759 (new # 100111256)
75 Power Distribution Board 211760 (new # 100111904)
76 Tubing - Silicone Rubber 210209-094 (new # 100111278)
78 Blocked Outlet Pressure Switch 210908 (new # 100110973)
80 Central Control Board 211758 (new # 100111255)
81 Gas Valve - Propane 192454-1 (new # 100109958) (qty. 2)
84 Feed Header 192767-2 (new # 100050928)
85 Return Header 192766-1 (new # 100050923)
86 120V Relay 211546 (new # 100111329)
88 Low Gas Pressure Switch - Natural Gas 191149-1 (new # 100109151)
88 Low Gas Pressure Switch - Propane 191149-3 (new # 100109151)
89 High Gas Pressure Switch - Natural Gas 192527-1 (new # 100109902)
89 High Gas Pressure Switch - Propane 192527 (new # 100109901)
90 Standard Pump (GW models) 200638 (new # 100059169)
92 Tank Temperature Kit (GW models) 210324 (new # 100109985)
93 Communication Harness Assembly 211953-1 (new # 100063642)
94 Burner Gasket 210476 (new # 100110705) (qty. 10)
97 Fuse - 7.5 AMP 211943 (new # 100063635)
98 Jumper (qty. 2) 210491 (new # 100061174)
99 Orifice - Natural Gas 210880-91 (new # 100110726) (qty. 10)
99 Orifice - Propane 210880-48 (new # 100061661) (qty. 10)
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

 

 

 

 

Board Components:

Item Description GW-500 or GB-500 (LWCO / LO Gas / Hi Gas / IRI/ALARM)
109 Communication Harness Assembly - CCB J20 & J21 (qty. 2) 211953-1 (new # 100063642) -----
120 Harness - Tank Probe - CCB J14 211989 (new # 100063654) -----
123 Harness - 24 VAC Output - CCB J4 211951 (new # 100063640)
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

 

Download original AO Smith Parts List
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