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Directory: Catalog > Water
Heaters > A.O. Smith > Parts
Parts List: A.O. Smith LB-750, LW-750, Series 300/301
- 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.
Waterways and Combustion Chamber Parts List:
| Item |
Description |
LB/LW-750
Series 300/301 |
| 5 |
Coupling, Flexible with Gasket |
191780 (new # 100050119) |
| 11 |
Ignitor |
192334 (new # 100110899) |
| 15 |
Probe, Outlet Temp/ECO |
210572 (new # 100110742) |
| 16 |
Probe, Inlet Temp |
210571 (new # 100110747) |
| 20 |
Sensor, Flame |
210421 (new # 100110707) |
| 21 |
Spacer Ring |
191554 (new # 100049869) |
| 22 |
Switch, Safety Flow |
211480 (new # 100110588) |
NOTES:
- The manufacturer may change part numbers and availability at any time.
+ Items not illustrated.
- Replacement housing assemblies (Item 10) are currently all steel type. When replacing the housing assembly, both the inner gasket (Item 9) and outer gasket (Item 7) must also be replaced. In addition, high temperature silicone sealant (Item 19) is required to fix the gaskets to the surfaces.
- The Tub Replacement Kit is available for replacing housing assemblies. When ordering, use part number 211742 for LB/LW-500 models, 211742-1 for LB/LW-750 models and 211742-2 for LB/LW-1000 models. |
Jacket/Frame Assembly:
| Item |
Description |
LB/LW-750
Series 300/301 |
| 23 |
Switch, Blower Prover |
191666 (new # 100110729) |
| 25 |
Switch, Rocker |
191665-1 (new # 100109882) |
| 31 |
Switch, Relay |
211546 (new # 100111329) |
Train/Blower Assembly, Natural Gas:
| Item |
Description |
LB/LW-750
Series 300/301 |
| 3 |
Blower Manifold Assembly |
191832 (new # 100110799) |
| 25+ |
Port, Obersation Lower |
191572 (new # 100049889) |
| 31 |
Switch, Low Pressure |
191149-1 (new # 100109151) |
| 38 |
Valve, Main Gas |
78481-3 (new # 100110223) |
| + Not Illustrated. |
Train Assembly, Propane:
| Item |
Description |
LB/LW-750
Propane |
| 5 |
Switch, Low Gas Pressure |
191149-3 (new # 100109151) |
Bypass Parts List:
| Item |
Description |
LB/LW-750 |
| 3 |
Relief Valve - LB model |
210451-1 (new # 100111922) |
| 3 |
Relief Valve - LW Model |
|
| 10+ |
Tube, Condensate |
191746-120 (new # 100109886) |
| + Not Illustrated. |
Download original AO Smith Parts List
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