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Parts List: A.O. Smith GB-1500, GW-1500; Series 400 / 405

  1. Use the chart to find the part you need to order. A diagram of the unit is below the chart to assist you in locating your part.
  2. Click on the underlined link to go directly to the part's page for pricing and ordering.
  3. *For parts that are not underlined and do not have a link, please Contact Us for price and availability.
  4. The manufacturer has changed some part numbers to a new part number, and we have referenced the new part number in the chart (if applicable). Please note that the manufacturer may change part numbers and availability at any time.
  5. You can download and print the original PDF of the A.O. Smith parts list at the bottom of the page.

 

Combustion Chamber Assembly Components:

Item Description GB/GW-1500
Series 400 / 405
1 Base/Leg Assembly 210702-2*
2 Blower Assembly, Large 211096 (new # 9005332205) (qty. 2)
3 Blower Assembly, Small -----
4 Bracket, Gas Manifold 210780 (new # 9005843205) (qty. 3)
5 Burner, 60mm 210757 (new # 9005895205) (qty. 13)
6 Burner Assembly 211306 (new # 9005847205) (qty. 2)
7+ Clamp, Hose 211360* (qty. 2)
8 Control Panel 210740-2 (new # 210740-002)
9 Flame Sensor 192682 (new # 9004520215) (qty. 3)
10 Flubox Assembly 211290-1*
11 Gas Train, 3 Burner - Natural Gas -----
12 Gas Train, 3 Burner - Propane -----
13 Gas Train, 4 & 5 Burner - Natural Gas 211081 (new # 9005331205) (qty. 3)
14 Gas Train, 4 & 5 Burner - Propane 211081-1* (qty. 3)
15 Gasket, Blower 210775 (new # 210775-000) (qty. 2)
16 Gasket, Blower -----
17 Gasket, Burner 210744 (no longer available)
18 Gasket, Divider Insert 211363*
19 Gasket, Heat Exchanger (qty. 2) 210779 (new # 210779-000)
20 Gasket, Ignitor 210078 (new # 9005933215)
(qty. 2)
21 Gasket, Observation Port (qty. 2) 211297 (new # 211297-000)
22 Heat Exchanger Assembly (GB models) 210731-2*
22A Heat Exchanger Assembly Brass (GB models) 211494-2*
23 Heat Exchanger Assembly (GW models) 210750-2 (new # 9005231205)
23A Heat Exchanger Assembly (GW models) 211582-2*
24 Igniter 192334 (new # 9006101205) (qty. 2)
25 Insulation Assembly:  
25A Insulation, Bottom Mate 210724-1 (no longer available)
25B Insulation, Bottom Panel 210723 (new # 210723-000)
25C Insulation, Front Mate 210722-1 (new # 210722-001)
25D Insulation, Front Panel 210721 (new # 210721-000)
25E Insulation, Rear Mate 210726-1 (no longer available)
25F Insulation, Rear Panel 210725 (no longer available)
25G Insulation, Side Panel 210727 (no longer available)
25H Insulation, Side Panel 210727-1 (no longer available)
25I Insulation, Side Panel 210728-7 (no longer available)
25J Insulation, Side Panel 210728-5 (no longer available)
25K Insulation, Top Panel 210743-1 (no longer available)
26 Insulation, Fluebox Outer (qty. 2) 211411-1*
27 Main Gas Manifold 210756-2 (new # 210756-002)
28 Manifold Assembly, 3 Burner -----
29 Manifold Assembly, 3 Burner -----
30 Manifold Assembly, 4 Burner -----
31 Mainfold Assembly, 5 Burner 210763 (new # 210763-000) (qty. 3)
32 Nut, Hex Serrated Flange 210226 (new # 210226-000) (qty. 8)
33 Nut, Locking 21074* (qty. 6)
34 Observation Port Assembly (qty. 2) 98760 (new # 9005356215)
35 Orifice - Natural Gas 210758-111 (new # 210758-111) (qty. 15)
36 Orifice - Propane 210758-75 (new # 210758-075) (qty. 15)
37 Panel, Air Box Divider -----
38 Panel, Air Box Divider with Slot 210720-1 (new # 210720-001)
39 Panel, Air Diverter 211080 (new # 211080-000) (qty. 2)
40 Panel, Front Combustion 210703-2 (new # 9005842205)
41 Panel, Side Air Chamber 211088 (new # 211088-000)
42 Panel, Side Air Chamber 211088-1*
43 Panel, Top Combustion 210717-2 (new # 210717-002)
44 Plate, Divider Insert 211134 (new # 211134-000)
45 Plate, Insert Mate 211309 (new # 211309-000)
46 Rear Combustion Assembly 211254-2*
47 Screw Cap 190960* (qty. 8)
48 Side Panel Assembly 210716-1*
49 Side Panel Assembly 210716*
50 Silicone Tube 210209-10* (qty. 4)
51 Silicone Tube 210209-25* (qty. 3)
52 Strain Relief 210173 (new # 210173-000) (qty. 2)
53 Strain Relief Tube Assembly 210234* (qty. 4)
54 Switch, Blocked Flue 210908-2 (new # 9005681205)
55 Switch, Differential 211094 (new # 9004634215) (qty. 2)
56 Switch, Differential - Propane 211094-1 (new # 9004634215) (qty. 2)
57 Switch, Low Gas - Natural Gas 191149-1 (new # 9003301205)
57 Switch, Low Gas - Propane 191149-3 (new # 9003301205)
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.

 

 

Jacket Assembly Components:

Item Description GB/GW-1500
Series 400 / 405
1 User Interface, Display 211762*
2 Bracket, Control Box Support 211362*
3 Cap, Pipe 43762-1*
4 Control Box 212458*
5 Gasket,Conduit (qty. 2) 211266 (new # 211266-000)
6 Gasket, Main Gas Manifold (qty. 2) 211045 (new # 211045-000)
7 Gasket, Vent Adaptor (qty. 2) 211049-2 (new # 211049-002)
8 Gasket, Vent Adaptor (Air Inlet) 211049-1 (new # 211049-001)
9 Handle, Front Panel 191802 (new # 191802-000)
10 J-Box Cover (qty. 2) 2233 (new # 002233-000)
11 Junction Box (qty. 2) 190438-4 (new # 190438-004)
12 Locknut, Star (qty. 2) 1953 (new # 001953-000)
13 Nipple, Chase (qty. 2) 41994*
14 Nut, Speed 68463 (new # 068463-000) (qty. 4)
15 Panel, Display Assembly 212510-000*
16 Panel, Front Bottom 211252-2*
17 Panel, Rear Jacket 210739-2*
18 Panel, Right Jacket Assembly 211073-2*
19 Panel, Side Access 210792*
20 Panel, Side Jacket 210738*
21 Panel, Side Jacket 210737 (new # 210737-000)
22 Panel, Side Jacket Insert (qty. 2) 211074*
23 Panel, Top Jacket 210733-2 (new # 210733-002)
24 Panel, Mid-Jacket Assembly -----
25 Plate, Conduit 211265*
26 Plate, Conduit - 2 Holes 211265-1*
27 Plate, Flue 211047-1*
28 Plate, Main Gas Manifold (qty. 2) 211046*
29 Plate, Top Jacket 211142 (new # 9005236205)
30 Screw, Panel 68462 (new # 068462-000) (qty. 4)
31 Screw, Sheet Metal 210125-1 (new # 210125-001) (qty. 56)
32 Switch, Rocker 191665-1 (new # 9004484215)
33 Valve, Ball 2 x 2 69022-2 (new # 069022-002)
34 Valve, Ball 2-1/2 x 2-1/2 -----
35 Vent Adaptor - Exhaust 210783-2*
36 Vent Adaptor - Air Inlet 210783-1*
37 Washer, Locknut (qty. 4) 210207 (new # 210207-000)
38 Washer, Retaining (SPL) 68338 (new # 068338-000) (qty. 4)
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

Water Heater Connections:

Item Description GB-1500 or GW-1500
1 Flow Switch Conduit Assembly 211156 (new # 211156-000)
2 Inlet Temp. Conduit Assembly 210180-1 (new # 210180-001)
3 Low Water Cutoff 210376 (new # 210376-000)
4 Low Water Cutoff Conduit Assembly 211118 (new # 211118-000)
5 Outlet Conduit Assembly 210181-1 (new # 210181-001)
6 Pump - 1/2 HP Volute (GW-1500) 211324 (new # 9006846005)
7 Pump - 1 HP Volute -----
8 Relief Valve - 125 PSI (GW-1500) 98883-3 (new # 098883-003)
9 Relief Valve - 50 PSI (GB-1500) 210451-2 (new # 210451-002)
10 Switch - Flow (GB-1500) 210176*
11+ Tank Probe (GW-1500) 210211-1 (new # 9004615215)
NOTES:
- The manufacturer may change part numbers and availability at any time.
+ Item not illustrated.

 

 

Control Box Assembly:

Item Description GB/GW-1500 or GB/GW-1500 IRI
Series 400 / 405
1 Control Box Base 212459-001*
1 Control Box Base (IRI) 212459-000*
2 Control Box Panel 212457-001*
3 Central Control Board (CCB) 211758*
4 Flame Control Board (FCB) 211759 (new # 9006521005) (qty. 2)
5 Relay, 120-Volt 211546 (new # 9006612005)
5 Relay, 120-Volt (IRI) 211546 (new # 9006612005) (qty. 2
6 Control Box Top 211109*
7 Support Bracket 212455*
8 Control Box Front Panel 212461*
9 Power Distribution Board (PDB) 211760-000 (new # 9007310005)
10 Transformer, 150 VA 211477 (new # 9004639205)
11 Transformer, 250 VA -----
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

 

Wire Harness:

Item Description GB/GW-1500
Series 400 / 405
1 Harness, Power Line Input 212447*
2 Harness, 120 VAC Power Distribution 212410-000*
3 Harness, 24 VAC Power Distribution 212409-000*
4 Harness, Transformer 212411-000*
5 Harness, Relay Coil 211949-002*
6 Harness, Gas Valve Realy Power (not shown) 211952-000*
7 Harness, Gas Valve Relay Power 211951-001*
8 Harness, Communication 211953-001
9 Harness, Communication (qty. 2) 211953-001
10 Harness, Inlet Probe 211954-000*
11 Harness, Outlet ECO 211955-000*
12 Harness, External Thermostat 211956-002*
13 Harness, 120 VAC Stage Output 212692-000*
14 Harness, 120 VAC Stage Output (qty. 2) 212692-001*
15 Harness, Chasis Grounding (not shown) 211204-407* (qty. 3)
16 Harness, Transformer Jumper (not shown) -----
17 Harness, Pump Realy Contacts 211963-000*
18 Harness, 24 VAC Output Stages (qty. 3) 212413-000*
19 Harness, 24 VAC Output Stages -----
20 Harness, Tank Probe 211989-000
21 Harness, Pump 211945-003*
22 Harness, Switch Input 211950-003*
23 Harness, 24 VAC Output 211951-001*
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

 

3 Stage Control Shelf Wiring Harnesses:

Item Description GB-1500 or GW-1500
1 120VAC Termination Assembly -----
2 120VAC Termination Assembly -----
3 120VAC Termination Assembly 211376*
4 120VAC Termination Assembly 211101 (new # 211101-000)
5 120VAC Termination Assembly -----
6 24VAC Termination Assembly -----
7 24VAC Termination Assembly -----
8 24VAC Termination Assembly 211375 (new # 211375-000)
9 24VAC Termination Assembly 211100 (new # 211100-000)
10 GW Pump Harness Assembly 211393-2*
NOTES:
- The manufacturer may change part numbers and availability at any time.

 

 

IRI/CSD-1 Components:

Item Description GB/GW-1500
Series 400 / 405
1 Alarm Bell 211472 (new # 211472-000)
2 Bracket 211504*
3 High Pressure Switch - Natural Gas 192527-1 (new # 9004513215) (qty. 3)
3 High Pressure Switch - Propane 192527 (new # 9004512215) (qty. 3)
4 Main Manual Shut-Off 69022-2 (new # 069022-002)
5 Pilot Shut-Off Valve 200683 (new # 200683-000)
6 Safety Shut-Off Valve (qty. 2) 211503 (new # 211503-000)
7 Vent, Valve 210698-1 (new # 210698-001)
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.

 

 

Download original AO Smith Parts List
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