Suburban Nt Series NT23M Parts Diagram · Exploded View › Burner Assembly

Furnace · 5 assemblies · 5 diagram sheets · 124 parts · by Andrew Strick, mobile RV technician

OEM exploded parts diagrams for the Suburban Nt Series NT23M RV furnace: 5 assemblies (Exploded View › Burner Assembly, Exploded View › Combustion Chamber, Exploded View › Blower Assembly, Replacement Furnace, Exploded View › Cabinet Assembly) and 124 manufacturer part numbers. 26 parts are marked as superseded — the description gives the replacement number to order instead.

The rating plate is on the furnace chassis — slide the unit's front panel off or look just inside the exterior access door. Suburban models (SF-30F, NT-34SP …) changed burners and boards over the years, so the serial number's date range matters as much as the model.

Exploded View › Burner Assembly

Components

21 items

1. #SCREW, BURNER MOUNTING #10 - 24 X 3/8 (2 REQ.) MFR # 121460
2. #APPLIANCE COMPONENTS RV; Elbow 90 Deg MFR # 170082
3. #Furnace Gasket; Furnace Gas Inlet Tube Gasket; Fits Suburban Furnace NT-45S MFR # 70432
4. #Screw; For Suburban Furnace NT-Series; Fits Suburban Furnace Combustion Chamber; #10 x 3/8 Inch MFR # 121252
5. #COVER PLATE, GAS INLET MFR # 62143
6. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
7. #PIPE, GAS INLET MFR # 170772
8. #SUBURBAN VALVE MFR # 161123
9. #VALVE, GAS USE 161123 MFR # 161078 Superseded: see description
10. #VALVE,GAS USE 161078 MFR # 160832 Superseded: see description
11. #MANIFOLD ASM MFR # 170771
12. #Furnace Burner Orifice; For Suburban Furnace NT-30M/ NT-30S/ NT-30SP/ SF-30/ SF-30F/ P-30S/ NT-30K MFR # 180214
13. #Furnace Burner Orifice; For Suburban Furnace NT-34/ NT-34M/ NT-34S/ NT-34SP/ NT-35K/ SF-35/ SF-35F MFR # 180222
14. #Furnace Burner Orifice; Number 54 Orifice; For Suburban Furnace NT-20T/ NT-23M/ NT-24BW/ NT-24HA/ NT-24HS/ NT-24M/ NT-24MD/ NT-24MP/ NT-24MPD/ NT-24S/ NT-24SP/ NT-25K/ NT-30BW/ NT-30H/ NT-30HA/ NT-30HS/ NT-30MA/ NT-30MD/ NT-34H/ NT-34HS/ NT-34L/ NT-34MM/ NT-34MMD/ NT-34S/ NT-45M/ NT-45S/ P-45M/ P-45S MFR # 180215
15. #Furnace Gasket; Furnace Manifold Gasket; Fits Suburban Furnace NT-24SP/ NT-30SP/ NT-34SP/ NT-40/ P-30S/ P-40/ P-40B MFR # 70408
16. #SHUTTER,AIR BURNER MFR # 10582
17. #SPRING MFR # 150026
18. #APPLIANCE COMPONENTS RV; Washer Flat 7/32Idx1/2Od MFR # 120684
19. #POWER CONTROL MODULE MFR # 10609
20. #BURNER ONLY USE 10609 MFR # 10581 Superseded: see description
21. #PIN,ROLL STEEL MFR # 121250

Exploded View › Combustion Chamber

Components

52 items

1. #SCREW, BURNER MOUNTING #10 - 24 X 3/8 (2 REQ.) MFR # 121460
2. #APPLIANCE COMPONENTS RV; #8 Screw MFR # 120158
3. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
4. #COVER,AIR ADJ HOLE MFR # 290119
5. #APPLIANCE COMPONENTS RV; Gskt Cov Air Adj MFR # 70389
6. #APPLIANCE COMPONENTS RV; Electrode MFR # 230590
7. #ELECTRODE USE 230590 MFR # 230480 Superseded: see description
8. #GASKET, PILOT BURNER USE 71076 MFR # 70163 Superseded: see description
9. #Furnace Gasket; Furnace Burner Access Door Gasket And Electrode Gasket; Fits Suburban Furnace NT-12/ NT-16/ NT-20/ NT-12S/ NT-16S/ NT-20S/ NT-12SP/ NT-16SP/ NT-20SP/ NT-24/ NT-30/ NT-34/ NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S/ NT-24SP/ NT-30SP/ NT-34SP/ NT-40/ P-30/ P-40; Also Use New Number 525011 MFR # 71076 Superseded: see description
10. #SCREW 8-32 X 1/2 SLOT HEX MFR # 121387
11. #STRAP, GROUND MFR # 230173
12. #DOOR,COMBUSTION CHAMBER MFR # 30451
13. #Furnace Access Door Sight Glass; Replacement For Suburban Furnace NT-Series/ P-45M/ P-45S MFR # 310026
14. #APPLIANCE COMPONENTS RV; Cover Plate MFR # 290120
15. #GASKET,BURNER USE 71076 MFR # 70398 Superseded: see description
16. #CHAMBER,COMBUSTION W/RA DIATION SHIELD MFR # 20786
17. #Furnace Limit Switch; For Suburban Furnace NT-30SP/ NT-34SP/ NT-24/ NT-30/ NT-34/ NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S/ P-30S; Also Use New Number 525020 MFR # 231244 Superseded: see description
18. #Furnace Limit Switch; For Suburban Furnace P-30S/ NT-34SP/ NT-24/ NT-30/ NT-34/ NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S MFR # 230496
19. #Furnace Limit Switch; For Suburban Furnace Models P-30S/ NT-34SP/ NT-24/ NT-30/ NT-34/ NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S MFR # 230496MC
20. #SWITCH,LIMIT MFR # 232578
21. #BUSHING MFR # 230362S
22. #INSULATOR, MODULE BOARD MFR # 70587
23. #ignition Control Circuit Board; Replacement For Suburban 520741 Or 520820 Boards And Fits All Suburban 12 Volt Furnaces; Will Not Replace 24 Volt AC Boards MFR # 521099
24. #ignition Control Circuit Board; For Suburban Furnace SF Series/ NT Series And All Water Heater DSI Series/ SW Series/ VDSI Series; Also Use New Number 521099 For Furnaces Or 520814 For Water Heaters MFR # 520741 Superseded: see description
25. #UNIVERSAL IGN BRD LARGE MFR # UIBL
26. #UIB WITH FAN CONTROL MFR # FAN50PLUS
27. #Ignition Control Circuit Board Cover; Replacement For Dinosaurs Universal Igniter Boards; Large; White; Fire Retardant ABS Plastic MFR # LCVR
28. #UIB S WITH POST TOP MFR # UIBSPOST
29. #Furnace Wiring Harness; For Suburban Furnace DD17DSI/ NT-Series MFR # 232161
30. #UNIVERSAL IGN BRD SMALL MFR # UIBS
31. #COVER FOR UIB S MFR # SMALLCOVER
32. #UIB L WITH POST TOP MFR # UIBLPOST
33. #BOARD,MODULE USE 520741 (05152435103) MFR # 230587 Superseded: see description
34. #APPLIANCE COMPONENTS RV; NUT HEX 6-32 MFR # 120744
35. #CAP LUG #1-3/8 RED INSULATOR CAP F/ CIR BD MFR # 70549
36. #Screw; For Suburban Furnace NT-Series; Fits Suburban Furnace Combustion Chamber; #10 x 3/8 Inch MFR # 121252
37. #THERMOSTAT RELAY MFR # 230423
38. #WATER FLANGE WHIT PLASTC MFR # 62135
39. #Furnace Limit Switch; For Suburban Furnace Models NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S MFR # 230575MC
40. #Furnace Limit Switch; For Suburban Furnace NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S (Below Serial Number 1600851) MFR # 230575
41. #BRAKE CONTROL WIRIING ADAPTER TIMED & INERTIA MFR # 20270
42. #RADIATION SHIELD ASSEMBLY MFR # 110426
43. #BAFFLE, EXHAUST TUBE MFR # 40293
44. #APPLIANCE COMPONENTS RV; Screw #10-16 X 1/2 MFR # 121436
45. #APPLIANCE COMPONENTS RV; Screw 10 X 3/4 Ph Ph MFR # 121224
46. #SCREW,8 X 3 1/4 USE 121711 MFR # 121256 Superseded: see description
47. #Screw; For Suburban Furnace Exhaust Vent; 8 X 3-1/4; Set Of 2 MFR # 121711
48. #VENT CAP AND TUBE ASSEMBLY MFR # 260096
49. #BURNER ACCESS DOOR ASSY MFR # 30506
50. #APPLIANCE COMPONENTS RV; Wire Electrode - N.L.A. MFR # 231713
51. #WIRE,ELECTRODE USE 318060002 MFR # 230491 Superseded: see description
52. #WIRE,HIGH VOLTAGE USE 231713 MFR # 318060002 Superseded: see description

Exploded View › Blower Assembly

Components

35 items

1. #Furnace Blower Wheel; For Suburban Furnace NT-30SP/ NT-34SP MFR # 350113
2. #WHEEL,ROOM AIR USE 350113 MFR # 350076 Superseded: see description
3. #Screw; For Suburban Furnace NT-Series; Fits Suburban Furnace Combustion Chamber; #10 x 3/8 Inch MFR # 121252
4. #HOUSING, ROOM AIR BLOWER ASSEMBLY MFR # 390269
5. #SWITCH,MICRO USE 230510 W/WIRE ASSM MFR # 230747 Superseded: see description
6. #Furnace Low Air Flow Switch; For Suburban Furnace Models NT-30/ NT-34/ NT-30M/ NT-34M/ NT-30S/ NT-34S/ NT-30SP/ NT-34SP/ NT-25/ NT-30/ NT-35/ NT-35K/ P-30S/ SF-20/ SF-25/ SF-30/ SF-35/ SF-20F/ SF-25F/ SF-30F/ SF-35F MFR # 230509MC
7. #Furnace Low Air Flow Switch; For Suburban Furnace NT-30/ NT-34/ NT-30M/ NT-34M/ NT-30S/ NT-34S/ NT-30SP/ NT-34SP/ NT-25/ NT-30/ NT-35/ NT-35K/ P-30S/ SF-20/ SF-25/ SF-30/ SF-35/ SF-20F/ SF-25F/ SF-30F/ SF-35F; Also Use New Number 525024 MFR # 233356 Superseded: see description
8. #Furnace Low Air Flow Switch; For Suburban Furnace NT-40; Also Use New Number 233355 MFR # 232279 Superseded: see description
9. #MICROSWITCH ASSEMBLY USE 230509 MFR # 230748 Superseded: see description
10. #Furnace Low Air Flow Switch; For Suburban Furnace NT-30/ NT-34/ NT-30M/ NT-34M/ NT-30S/ NT-34S/ NT-30SP/ NT-34SP/ NT-25/ NT-30/ NT-35/ NT-35K/ P-30S/ SF-20/ SF-25/ SF-30/ SF-35/ SF-20F/ SF-25F/ SF-30F/ SF-35F; Also Use New Number 233356 MFR # 68406 Superseded: see description
11. #Furnace Low Air Flow Switch; For Suburban Furnace NT-40 MFR # 233355
12. #Screw; Use With Suburban Furnace Part Numbers NT-16SE/ NT-20SE; # 2; 56 Inch x 5/8 Inch; Hex Head MFR # 121247 Superseded: see description
13. #APPLIANCE COMPONENTS RV; Washer Lock #2 MFR # 121364
14. #NUT HEX 2-56 MFR # 120672
15. #Screw; Use With Suburban Furnace Model NT40; Phillips Head; 10-24 x 1/2 MFR # 121227 Superseded: see description
16. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
17. #Furnace Motor Bracket; For Suburban NT-40 MFR # 62138
18. #Nut; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; Fits Furnace Combustion Air Housing; Locking; #10-24 Thread Size MFR # 120717
19. #Furnace Motor; For Suburban Furnace Models NT-24 M/ NT-24S/ NT-24SP MFR # 231206MC
20. #Furnace Motor; For Suburban Furnace NT-24 M/ NT-24S/ NT-24SP MFR # 231206
21. #Furnace Gasket; Motor Mount Gasket; Fits Suburban Furnace NT-40 MFR # 70384
22. #APPLIANCE COMPONENTS RV; Suburban Comb Air Housing MFR # 390179
23. #APPLIANCE COMPONENTS RV; Screw #10-16 X 1/2 MFR # 121436
24. #WHEEL COMB AIR - obsolete MFR # 350077
25. #Furnace Gasket; Furnace Combustion Air Housing Gasket; Fits Suburban Furnace NT-24/ NT-30/ NT-34H/ NT-HA/ NT-34S/ NT-30SP/ NT-34HS/ NT-30MA/ NT-34L/ NT-34MM/ P-30S/ P-40S/ NT-42S/ NT-42ST MFR # 70386
26. #CHAMBER,COMBUSTION MFR # 390173
27. #Furnace Gasket; Furnace Crossover Tube Gasket; Fits Suburban Furnace NT-24M/ NT-30M/ NT-30SP/ NT-34SP/ NT-40 MFR # 70385
28. #TUBE,CROSSOVER USE 50751 MFR # 50439 Superseded: see description
29. #APPLIANCE COMPONENTS RV; Ac/Dc Switching Relay MFR # 230255
30. #DIODE RECTIFIER MFR # 230297
31. #TRANSFORMER BE 8192 OR BE 8912 MFR # 230323
32. #CONVERTER/CHARGER USE DLS15 MFR # PC15 Superseded: see description
33. #Power Converter; DLS Series; Converts 108 To 132 Volt AC To 13.6 Volt DC; 200 Continuous Watts; 15 Amps Continuous Output; 80 Percent Efficiency; With Short Circuit/ Reverse Polarity/ Over Load/ Thermal Protection; 9.7 Inch Length x 6.7 Inch Width x 3.4 Inch Height; With 36 Inch Length Power Cord; Compatible With IOTA IQ4 Charge Controller MFR # DLS15
34. #CONVERTER,9 AMP USE 6712N W/O CHARGER MFR # 6509X Superseded: see description
35. #VALVE,SHUTOFF MFR # 160740

Replacement Furnace

Exploded View › Cabinet Assembly

Components

24 items

1. #CABINET ASSEMBLY MFR # 100950
2. #Stove Mounting Bracket; For Suburban Range; Angled; Single MFR # 122060
3. #APPLIANCE COMPONENTS RV; Sububan Tinnerman Fastene MFR # 121662
4. #Furnace Gasket; Furnace Bottom Duct Adapter Gasket; Fits Suburban Furnace NT-24/ NT-30/ NT-34S/ NT-24/ NT-30SP/ NT-25/ NT-30/ NT-35K/ NT-24/ NT-30/ NT-34HS/ P-30S MFR # 62164
5. #Fifth Wheel Trailer Hitch; 16000 Pound Weight Carrying Capacity; With Mounting Rails MFR # 70546
6. #APPLIANCE COMPONENTS RV; Screw 10 X 3/4 Ph Ph MFR # 121224
7. #FRONT,CABINET GRAY ***SEE NOTES FOR USE #'S MFR # 100808 Superseded: see description
8. #Furnace Adapter Plate; For Suburban Furnace NT-30SP MFR # 101871DG
9. #PUMP ASM, OIL MFR # 70547G
10. #Screw; For Suburban Furnace NT-Series; Fits Suburban Furnace Combustion Chamber; #10 x 3/8 Inch MFR # 121252
11. #Furnace Gasket; Furnace Disk Cover Gasket; Fits Suburban Furnace NT-20T/ NT-23M/ NT-24M/ NT-24MD/ NT-24S/ NT-24SP/ NT-30M/ NT-30MD/ NT-30S/ NT-30SP/ NT-34MM/ NT-34MMD/ NT-34S/ NT-34SP/ P-30S/ P-45S/ NT-45SE MFR # 70534
12. #DISC COVER, GAS INLET PIPE MFR # 52408
13. #Wall Thermostat; Single Stage; Snap-Action; Low Voltage; Heat Only; 24 Volt; White MFR # 01C20102S1
14. #T-STAT USE 161154 MFR # 160813 Superseded: see description
15. #APPLIANCE COMPONENTS RV; Thermostat 3 Day Program MFR # 1F80R850
16. #Wall Thermostat; Single Stage; For Heat And Cool Control; Programmable; Digital Display; 24 Volt; Battery Powered MFR # 1F87R875
17. #Wall Thermostat; Heat; Not Programmable; Mechanical Readout; Black MFR # 161210
18. #Wall Thermostat; Single Stage; For Heat/ Cool Control; Mechanical Readout; 12 Volt; Without Fan Speed Control; Without Fan On Mode MFR # 100402
19. #Wall Thermostat; Single Stage; For Heat Control; Mechanical Readout; White Case MFR # 161154
20. #Wall Thermostat; Heat Only; Mechanical; 1 Stage; White; MFR # 1C20101
21. #APPLIANCE COMPONENTS RV;;Collar Duct MFR # 50296
22. #CABINET DOOR ASSEMBLY INCLUDES: MFR # 100949
23. #APPLIANCE COMPONENTS RV; Cab Front MFR # 100942
24. #Furnace Duct Cover Plate; Fits Suburban 4 Inch Duct MFR # 50733