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Directory: Catalog > Water
Heaters > A.O. Smith > Parts
Parts List: A.O. Smith GB-2500, GW-2500; Series 400 / 405
- Links are included to the parts that are available to be purchased.
- Parts that are not listed in the chart are either discontinued by AO Smith or are not available for purchase.
- The item number in the first column corresponds to the location of the part in the line art drawing below the chart.
Combustion Chamber Assembly Components:
| Item |
Description |
GB/GW-2500
Series 400/405 |
| 2 |
Blower Assembly, Large |
211096 (new # 100110413) (qty. 3) |
| 5 |
Burner, 60mm |
210757 (new # 100110710) (qty. 22) |
| 6 |
Burner Assembly |
211306 (new # 100110692) (qty. 3) |
| 9 |
Flame Sensor |
192682 (new # 100109908) (qty. 4) |
| 13 |
Gas Train, 4 & 5 Burner - Natural Gas |
211081 (new # 100110412) (qty. 3) |
| 19 |
Gasket, Heat Exchanger (qty. 2) |
210779 (new # 100061541) |
| 24 |
Igniter |
192334 (new # 100110899) (qty. 2) |
| 29 |
Manifold Assembly, 3 Burner |
210761 (new # 100111819) (qty. 2) |
| 34 |
Observation Port Assembly (qty. 2) |
98760 (new # 100110431) |
| 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.
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Jacket Assembly Components:
| Item |
Description |
GB/GW-2500
Series 400/405 |
| 1 |
User Interface, Display |
211762 (new # 100111940) |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Water Heater Connections:
| Item |
Description |
GB-2500 or GW-2500 |
| 2 |
Inlet Temp. Conduit Assembly |
210180-1 (new # 100060723) |
| 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.
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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) |
| 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 |
N/A |
| 3 |
High Pressure Switch - Propane |
192527 (new # 100109901) (qty. 7) |
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.
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