Directory: Catalog > AO Smith Repair Parts

A.O. Smith Water Heater Repair Parts

All AO Smith parts that we stock and/or sell are listed below in numerical order. Please click on the part number you are looking for to get started:

Beginning with 1000:

• 10007----
• 100074237: Ignitor
• 10009----
• 100093631: Igniter Replacement, Universal
• 100093712: Ignition Control Relay, Polaris, 175/199K
• 100093794: Gas Control Valve, Natural Gas
• 100093801: Manifold Door Assembly, Natural Gas
• 100093812: FG, Door Switch, Natural Gas, FG50T40
• 100093823: Gas Control Valve, Propane (LP)
• 100093872: Igniter, PV
• 100093873: Gas Valve, Intellivent, Natural Gas, W/R
• 100093874: Gas Control Valve, Propane (LP)
• 100093983: Pilot/Thermopile with Tubing, JC, Propane
• 100093991: Final Burner Assembly, Natural Gas
• 100093992: Final Burner Assembly, Natural Gas
• 100093994: Final Burner Assembly, HWL, MFG30T30N
• 100094001: Final Burner Assembly, Natural Gas
• 100094002: Final Burner Assembly, HWL, BFG40S40N

Beginning with 1001:

• 100108---
• 100108299: Gas Installation Kit, 10 (Blisterpack)
• 100108346: Heating Element, 3800W, 240V, 13.125 in., Incoloy
• 100108348: W/R NAT. Res. Gas Control
• 100108354: Gas Control, Residential, Natural
• 100108440: Heating Element, 3000W, 240V, 12 in., Incoloy
• 100108571: Anode, 42 in., 3/4 in.NPT,.75 in. Diameter, KA-90 Alum
• 100108660: Anode, 32 in., 3/4 in.NPT,.84 in. Diameter, Magnesium
• 100108683: Upper Thermostat with High Limit
• 100108796: Heating Element, 3800W, 240V, 13.3125 in., IN
• 100108831: Ignitor, Hot Surface, Electrode
• 100108951: Thermostat, with ECO & Cover, WH10C, Upper
• 100108952: Thermostat, with ECO & Cover, WH9C, Lower
• 100108954: Heating Element, 2500W, 120V, 8.125 in., Copper
• 100108977: Heating Element, 6000W, 480V, 13.125 in., Copper
• 100109---
• 100109139: Heating Element, 4500W, 240V, Sandhog, INC
• 100109157: Wall Mount
• 100109174: Conversion, 3 Elements, 3000W/240V, APCom
• 100109180: Conversion, 6 Elements, 4000W/240V, APCom
• 100109187: Conversion, 3 Elements, 6000W/480V, APCom
• 100109200: Final Burner Assembly, Natural Gas, FV, #33 Orifice
• 100109201: Final Burner Assembly, Natural Gas, FV, #33 Orifice
• 100109203: Final Burner Assembly, Natural Gas, FV, #33 Orifice
• 100109204: Final Burner Assembly, Natural Gas, FV, #31 Orifice
• 100109217: Gas Control Valve, Natural
• 100109219: Gas Control Valve, Propane (LP)
• 100109243: Pilot Assembly, FV, 180 Degree C, Propane
• 100109252: Final Burner Assembly, Propane (LP), FV, #50 Orifice
• 100109253: Pilot Assembly, FV, 170 Degree C, Propane
• 100109259: T&P Valve, 3/4 in.
• 100109261: Pilot Assembly, FV, 170 Degree C, Natural
• 100109286: Pilot Assembly, FV, 200 Degree C, Natural Gas
• 100109290: Pilot Assembly, FV, 180 Degree C, Natural Gas
• 100109293: Pilot Assembly, FV, 160 Degree C, Natural Gas
• 100109294: Pilot Assembly, FV, 160 Degree C, Propane (LP)
• 100109295: Pilot Assembly, FV, 190 Degree C, Natural Gas
• 100109298: Pilot Assembly, FV, 200 Degree C, Propane (LP)
• 100109300: Final Burner Assembly, Propane (LP), FV, #50 Orifice
• 100109312: Final Burner Assembly, Natural Gas, FV, #33 Orifice
• 100109314: Final Burner Assembly, Natural Gas, FV, #33 Orifice
• 100109315: Final Burner Assembly, Propane (LP), FV, #51 Orifice
• 100109316: Final Burner Assembly, Natural Gas, FV, #33 Orifice
• 100109318: Final Burner Assembly, Propane (LP), FV, #51 Orifice
• 100109326: Final Burner Assembly, Natural Gas, FV, #28 Orifice
• 100109355: Ignitor Assembly, Natural, 75
• 100109358: Gas Control Valve, Intellivent, Natural Gas
• 100109365: Gas Control Valve, Natural
• 100109367: Gas Control Valve, Propane (LP)
• 100109372: Gas Control Valve, Propane (LP)
• 100109424: Gas Control Valve, Intellivent, Natural Gas
• 100109446: Gas Control Valve, Natural Gas
• 100109467: Conversion, PCE/PCV, 1 Element, 2500W 277V
• 100109474: Conversion, PCE/PCV, 1 Element, 2500W 208V
• 100109476: Conversion, PCE/PCV, 1 Element, 3500W 208V
• 100109478: Conversion, PCE/PCV, 1 Element, 4500W 208V
• 100109504: Conversion, PCE/PCV, 2 Element, 4500W 208V
• 100109516: Conversion, PCE/PCV, 2 Element, 3000W 480V
• 100109520: Conversion, PCE/PCV, 2 Element, 6000W 480V
• 100109633: Heating Element, 4000W, 208V, 10.75 in., Copper
• 100109636: Heating Element, 6000W, 208V, 10.75 in., Copper
• 100109673: Blower Assembly, EPC
• 100109674: Gas Control Valve, Natural
• 100109677: Gas Control, Natural Gas
• 100109690: Gas Thermostat, Natural
• 100109718: Pilot Burner Assembly, Propane (LP)
• 100109721: Upper Probe
• 100109726: Lower Probe
• 100109740: Gas Control Valve, Intellivent, Natural Gas
• 100109745: Heating Element, 1500W, 120V, Sandhog, INC
• 100109754: Heating Element, 6000W, 240V, Sandhog, INC
• 100109756: Heating Element, 6000W, 208V, Sandhog, INC
• 100109761: Heating Element, 3500W, 240V, Sandhog, INC
• 100109777: Blower Assembly, FPSH, 40/50, Series 270
• 100109781: Gas Thermostat, Propane
• 100109783: Gas Control Valve, Natural
• 100109785: Blower and Motor Outline Boxed
• 100109812: Gas Control Valve, Natural
• 100109814: Pressure Switch, 2.5 in.
• 100109816: Switch, Pressure, 6.5 in.
• 100109824: Pilot, Natural
• 100109833: Solenoid
• 100109834: Gas Control Valve, Natural
• 100109844: Exhaust Assembly
• 100109856: Gas Control Smart Valve, Natural
• 100109859: Ignitor, Hot Surface
• 100109862: Exhaust Assembly
• 100109864: Blower Assembly
• 100109867: Gas Control Valve, Intellivent, Propane
• 100109876: Switch, Low Gas Pressure
• 100109877: Switch, Low Gas Pressure
• 100109879: IID Control
• 100109887: Ignition Control Module
• 100109899: Air Tube, 12 in.
• 100109906: Ignitor
• 100109908: Flame Sensor
• 100109909: G CTRL Gen 3&4 BNR, BTH150, 199, 199SBN
• 100109913: Gas Valve, Natural Gas
• 100109916: Dual Limit Control
• 100109920: Thermostat
• 100109924: Blower, BTH/SUF, 150/199
• 100109925: Switch, Blocked Inlet
• 100109926: Pilot Burner, Natural Gas
• 100109928: Pilot Burner, Propane (LP)
• 100109929: Module IID
• 100109932: Switch, Blocked Outlet
• 100109933: Switch, Blocked Inlet
• 100109934: Switch, Blocked Outlet
• 100109935: Flue Switch
• 100109941: Ignitor, Hot Surface
• 100109944: Ignition Board
• 100109945: Digital Thermostat
• 100109948: Ignitor, Hot Surface
• 100109962: Switch, Blower Prover
• 100109978: Ignitor Assembly
• 100110---
• 100110011: Thermal Switch Assembly
• 100110013: Switch, Air Pressure
• 100110036: Heating Element, 3500W, 240V, 10.75 in., Copper
• 100110046: Heating Element, 4500W, 240V, Sandhog, INC
• 100110068: Heating Element, 6000W, 480V, Sandhog, INC
• 100110069: Heating Element, 4000W, 480V, Sandhog, INC
• 100110072: Thermostat
• 100110083: Thermostat, Electric, 6-Screw
• 100110095: Water C/O
• 100110122: Heating Element, Comm, 480/15KW/3
• 100110123: Heating Element, Comm, 480/15KW/3
• 100110163: Circuit Board
• 100110218: Gas Control HW420-670 N
• 100110219: Gas Control, HW420-670, Propane (LP)
• 100110256: Thermostat with Well
• 100110266: Anode,.750 Diameter, Aluminum
• 100110273: Gas Control Valve, Intellivent, Natural Gas
• 100110275: Gas Control Valve, Intellivent, FVIR, Natural Gas
• 100110277: Gas Thermostat, Propane
• 100110278: Gas Control Valve, Natural
• 100110355: Ignitor, Field Replacement
• 100110458: Mag-Erad, 1 LB.
• 100110614: Wiring Harness
• 100110615: Switch, Blower Prover
• 100110627: Anode, 48 in., Flexible, Aluminum
• 100110692: Burner/Sleeve Assembly
• 100110701: Flame Rod
• 100110706: Gas Thermostat, Natural
• 100110707: Flame Sensor, Legend 1000 Only
• 100110714: T & P Valve, 150#, 3/4 in.
• 100110715: Inlet Switch
• 100110717: Transformer, 24 VAC, 40 VA
• 100110719: T & P Valve
• 100110722: Inlet Tube
• 100110724: Thermal Balancer
• 100110736: Switch, Blocked Outlet
• 100110738: T & P Relief Valve
• 100110753: Final Burner Assembly, Natural Gas, #32 Orifice
• 100110754: Final Burner Assembly, Natural Gas, #32 Orifice
• 100110757: Final Burner Assembly, Natural Gas, #31 Orifice
• 100110771: HSI Ignition Assembly
• 100110774: Gas Control Valve, Natural
• 100110775: Gas Thermostat, Propane
• 100110776: Gas Control Valve, Natural
• 100110777: Gas Thermostat, Propane
• 100110780: Sensor, Flammable Vapor
• 100110783: Pressure Switch
• 100110784: Anode, Flexible, 48 in., 3/4 in.NPT, Magnesium
• 100110789: Vent, Attentuation Assembly
• 100110795: Hot Surface Ignitor
• 100110799: Eiffikal Damper, 6 in., Cast Base
• 100110806: Blower Prover Switch, BTH 400
• 100110820: Switch, Air Pressure, 1.42 in.
• 100110825: Wire Harness
• 100110832: Sensor with Bracket, Flammable Vapor
• 100110849: Upper Probe
• 100110850: Lower Probe
• 100110857: Gas Valve, Natural Gas
• 100110867: Gas Valve, Natural Gas
• 100110883: Switch, Low Gas Pressure, Natural Gas
• 100110887: Switch, Blocked Outlet
• 100110893: Gasket 8 in.
• 100110899: Ignitor
• 100110904: Blower and Motor
• 100110927: Pilot Burner, PB-5P, 20 in. Wire, Natural
• 100110976: Burner Assembly
• 100110984: Pilot Assembly WR Nat with Tubing
• 100110997: Burner Head Mounted Pilot Field SRV
• 100111---
• 100111008: Electronic Control, BTH300N
• 100111010: Electronic Control, SUF300N
• 100111012: Electronic Control, BTH400NL
• 100111015: Electronic Control, SUF500NL
• 100111017: Display Board
• 100111019: Lower Probe
• 100111021: Blower Pressure Switch
• 100111023: Powered Anode Long
• 100111024: Powered Anode Short
• 100111032: Switch, Low Gas Pressure
• 100111033: Switch, Low Gas Pressure
• 100111038: Combined Controller, BTH 120, 100
• 100111039: Combined Controller, BTH 150, 100
• 100111040: Combined Controller, BTH 199, 100
• 100111041: Combined Controller, BTH 250, 100
• 100111044: Combined Controller, BTH 199, 101
• 100111049: Blower Assembly, BTH 150
• 100111050: Blower Assembly, BTH 199/250
• 100111055: Burner Assembly, BTH 199/250
• 100111056: Switch, Blower Prover
• 100111058: Switch, Blocked Outlet
• 100111061: Gas Valve/Venturi, BTH 199/250, 100
• 100111064: Switch, Blocked Inlet
• 100111065: Switch, Blocked Outlet
• 100111077: Controller, SUF 199, 100 Series
• 100111122: Ignitor Assembly, Hot Surface
• 100111184: Blower Assembly, Vertex 100
• 100111274: Communications Cable
• 100111302: Thermostat with ECO, WH10C, APCom, Upper
• 100111333: Final Burner Assembly, Natural Gas, 16 in., #29 Orifice
• 100111335: Final Burner Assembly, Natural Gas, 18 in., #37 Orifice
• 100111336: Final Burner Assembly, Natural Gas, 16 in., #37 Orifice
• 100111337: Final Burner Assembly, Natural Gas, 18 in., #37 Orifice
• 100111338: Final Burner Assembly, Propane (LP), 18 in., #51 Orifice
• 100111369: Gas Control Valve, Natural
• 100111371: Gas Control Valve, Natural
• 100111372: Gas Control Valve, Propane (LP)
• 100111381: Pilot Assembly with Tubing, Propane (LP)
• 100111395: Blower Assembly, Vertex
• 100111590: Quad Thermistor Tank Probe
• 100111593: Burner Gasket, Silicone
• 100111597: Gasket, Cleanout
• 100111631: Switch, Air Pressure,.82 in.
• 100111644: Ignitor
• 100111645: Wire Harness, with Silicone Grommet
• 100111651: Final Burner Assembly, Natural Gas, #31 Orifice
• 100111666: Final Burner Assembly, Natural Gas, #32 Orifice
• 100111708: Pilot Assembly with Tubing, Natural
• 100111732: Switch, Air Pressure,.75 in.
• 100111745: Silicone Gasket
• 100111778: PCB Assembly, with Base
• 100111830: Flame Rod
• 100111913: Gas Control Valve, Black Natural Gas
• 100111914: Switch, Air Pressure
• 100112---
• 100112701: Coupling Blower Outlet 3X3
• 100112706: Gas Control Valve, Natural Gas
• 100112746: Display Board
• 100113---
• 100113130: Non Return Valve
  
• 100113143: Switch, Blocked Inlet
• 100113150: Igniter, Series 130/131
• 100113151: Flame Sensor Rod
• 100113155: Power Supply Assembly
• 100113157: Transformer
• 100113158: Spark Module
• 100187---
• 100187858: Switch, Blower Prover, 1.0 in.
• 100187859: Switch, Blocked Outlet, 2.0 in.
• 100187862: AL Exhaust/Condensate Elbow, 3 in.
• 100187864: Blower Assembly
• 100187867: Gasket, Burner
• 100187874: Gas Valve/Venturi Assembly, Natural Gas
• 100187878: Gasket, Burner Plate
• 100187881: Spark Igniter Assembly
• 100187882: Flame Sensor
• 100187914: Final Burner Assembly, Natural Gas, 18 in., #34 Orifice
• 100187918: Final Burner Assembly, Natural Gas, 14 in., #37 Orifice
• 100187919: Final Burner Assembly, Natural Gas, 16 in., #37 Orifice
• 100187920: Final Burner Assembly, Propane (LP), 16 in., #51Orifice
• 100187922: Final Burner Assembly, Natural Gas, 18 in., #34 Orifice
• 100187931: Final Burner Assembly, Natural Gas, 16 in., #34 Orifice
• 100191120: Spark Igniter Assembly, Series 200/201

Beginning with 1002:

• 100210041: Pilot Thermopile Assembly
• 100210064: Anode Outlet, 23 in., 5 in. Nipple/HT, AL
• 100210066: Anode Outlet, 19 in., 5.5 in. Nipple/HT, MAG
• 100223203: Final Burner Assembly, 18 in., 3.5 in. Ext. AL, #34TP
• 100223770: Thermostat, TOD, Elect., 181 Degree
• 100223771: Thermostat, TOD, Elect., 120-181 Degree
• 100262938: Service, HW, N3, Gas Valve, Natural Gas, 1 in. CAV
• 100262939: Service, HW, N3, Gas Valve, Natural Gas, 2 in., CAV
• 100271885: Probe, Temp, Upper, with Integrated Conn.
• 100271886: Probe, Temp, Lower, with Integrated Conn.
• 100271887: FASCO GPM 7.9 Assembly
• 100271888: Spark Igniter Assembly, Straight
• 100271889: Spark Igniter Assembly, Angled
• 100271921: Danfoss Ignition Transformer
• 100271923: RG148 Enhanced Blower Assembly with O Press
• 100275612: Paint, Window Grey
• 100281540: FBA, Natural Gas, 75 Gallon, Cast Iron
• 100281574: Valve Assembly, HWL, Natural Gas, 2 in. CAV, 181 Deg., 4 in.
• 100293211: Conversion, LTE/DCE, 2 Element, 4500W208V
• 100293455: Pilot / Thermopile with Tubing, Natural Gas

Beginning with 1003:

• 100304360: MDA, 18 in. , Natural Gas, 3.75 in. EXT, 450D, TC, BFG40S, RS
• 100306288: Hot Water Recirc. Sys., Retrofit, FT1
• 100306289: Undersink Hot Water Recirc. Sys., UT1
• 100306290: Hot Water Recirc. Sy.s / Return, RT1
• 100309396: Thermost, PCB Assembly, Universal ET
• 100324744: Powered Anode, RES-LG, Prod. Pres.

Beginning with RM:

• RM7897 A 1002: Honeywell Automatic Programming Burner Control (7800 Series)