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Directory: Catalog > Water
Heaters > A.O. Smith > Parts
Parts List: A.O. Smith LB-750, LW-750; Series 400/401
- 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 & Combustion Chamber Parts List:
| Item |
Description |
LB/LW-750
Series 400/401 |
| 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.
+ Not Illustrated
|
Jacket/Frame Assembly:
| Item |
Description |
LB/LW-750 |
| 23 |
Switch, Blower Motor |
191666 (new # 100110729) |
| 25 |
Switch, Rocker |
191665-1 (new # 100109882) |
| 31 |
Switch, Relay |
211546 (new # 100111329) |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Natural Gas Train / Blower Assembly Model 750:
| Item |
Description |
LB/LW-750 |
| 3 |
Blower Manifold Assembly |
191832 (new # 100110799) |
| 25+ |
Port, Observation Lower |
191572 (new # 100049889) |
| 31 |
Switch, Low Pressure |
191149-1 (new # 100109151) |
| 38 |
Valve, Main Gas |
78481-3 (new # 100110223) |
NOTES:
- The manufacturer may change part numbers and availability at any time.
+ Not Illustrated
|
Propane Gas Train Assembly - Model 750:
| Item |
Description |
LB/LW-750 |
| 5 |
Switch, Low Gas Pressure |
191149-3 (new # 100109151) |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Propane By-Pass Parts List Model 750:
| Item |
Description |
LB/LW-750 |
| 3 |
Relief Valve: |
|
| |
- LB Model |
210451-1 (new # 100111922) |
| 10+ |
Tube, Condensate |
191746-120 (new # 100109886) |
NOTES:
- The manufacturer may change part numbers and availability at any time.
+ Not Illustrated |
Wiring Harness Assembly:
| Description |
|
| Transformer Harness Assembly: |
|
| - Model 1000 |
210578 (new # 100109200) |
| Outlet Temperature Control / ECO Assembly |
210572 (new # 100110742) |
| Tank Probe (LW Model) |
211541-1 (new # 100109985) |
| Inlet Temperature Control Assembly |
210571 (new # 100110747) |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Download original AO Smith Parts List
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