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Parts List: A.O. Smith GB-2100, GW-2100; 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-2100
Series 400 / 405
2 Blower Assembly, Large 211096 (new # 100110413) (qty. 3)
5 Burner, 60mm 210757 (new # 100110710) (qty. 18)
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)
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.
- 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-2100
Series 400 / 405
1 User Interface, Display 211762 (new # 100111940)
8 Gasket, Vent Adaptor (Air Inlet) 211049-2 (new # 100061872)
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

Water Heater Connections:

Item Description GB-2100 or GW-2100
2 Inlet Temp. Conduit Assembly 210180-1 (new # 100060723)
8 Relief Valve - 125 PSI (GW-2100) 98883-7 (new # 100110427)
9 Relief Valve - 50 PSI (GB-2100) 210451-2 (new # 100111923)
11+ Tank Probe (GW-2100) 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-2100 or GB/GW-2100 IRI
Series 400 / 405
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 (IRI) 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-2100
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-2100
Series 400 / 405
3 High Pressure Switch - Natural Gas N/A
3 High Pressure Switch - Propane 192527 (new # 100109901) (qty. 5)
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.

 

 

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