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Parts List: A.O. Smith BTH-300A, Series 974/975

  • 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.

 

Cyclone XHE BTH Parts List

Item Description
BTH-300A
Series 974-975
9 Temperature and Relief Valve 99383-3 (new # 100110739)
NOTES:
- The manufacturer may change part numbers and availability at any time.
- Standard hardware items may be purchased locally.

 

 

Cyclone XHE BTH Control Panel

Item Description
BTH-300A
Series 974-975
  Control Board, Cable Assembly (includes 4 & 4A): 194811 (new # 100109971)
5 Junction Box Assembly 194126 (new # 100109942)

 

 

Cyclone XHE BTH Operating Controls and Wiring

Item Description
BTH-300A
Series 974-975
2 Blower Prover Air Switch - Series 974 194706 (new # 100109962)
2 Blower Prover Air Switch - Series 975 195013 (new # 100110806)
3 Box, Anode 194857 (new # 100109972)
4 Box, Junction 194126 (new # 100109942)
8 Cable Assembly - Controls 194784 (new # 100109968)
  Control Board, Cable Assembly (includes item 11 and 11A): 194811 (new # 100109971)
14 Probe, Upper 192606 (new # 100109721)
15 Probe, Lower 192609 (new # 100109726)
16 Switch, Blocked Inlet 194911 (new # 100109973)
17 Switch, Blocked Outlet - Natural Gas 194910 (new # 100110811)
17 Switch, Blocked Outlet - Propane 195017 (new # 100110887)
20 Switch, Natural Gas, Low Gas Pressure 191149-6 (new # 100109878)
20 Switch, Propane, Low Gas Pressure 191149-4 (new # 100109876)
21 Transformer 192608 (new # 100109904)
22 Valve, Natural Gas 194536-5 (new # 100109959)
22 Valve, Propane 194536-6 (new # 100110885)

 

 

Item Description
BTH-300A
Series 974-975
Detail - Gas Valve
4 Switch, Low Gas Pressure 191149-6 (new # 100109878)
4 Switch, Low Gas Pressure - Propane 191149-4 (new # 100109876)
6 Valve, Natural Gas 194536-5 (new # 100109959)
8 Orifice Holder 192447 (new # 100110892)
Standard hardware items may be purchased locally.

 

 

Exhaust Elbow, Vent Kit & Blower Intake Parts

Item Description
BTH-300A
Series 974-975
6 Tubing 191746-72 (new # 100109886)
7 Connector, Exhaust 192636 (new # 100110947)

 

 

Blower/Burner Assembly

Item Description
BTH-300A
Series 974-975
1 Burner 194779 (new # 100111863)
2 Blower/Motor Assembly 194746 (new # 100109964)
4 Gasket 194817 (new # 100111744)
5 Gasket, Burner 194777 (new # 100052495)
7 Ignitor 192334 (new # 100110899)
11 Sensor, Flame 194776-1 (new # 100109966)
NOTES:
- The manufacturer may change part numbers and availability at any time.
- Standard hardware items may be purchased locally.

 

 

Powered Anode Assembly

Item Description
BTH-300A
Series 974-975
1 Anode 194787 (new # 100111023)
3 Control Box 194857 (new # 100109972)

 

 

Download original AO Smith Parts List
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