Suburban Nt Series NT12LE Parts Diagram · Exploded View › Combustion Chamber-blower Asm

Furnace · 4 assemblies · 8 diagram sheets · 85 parts · by Andrew Strick, mobile RV technician

OEM exploded parts diagrams for the Suburban Nt Series NT12LE RV furnace: 4 assemblies (Exploded View › Combustion Chamber-blower Asm, Exploded View › Cabinet Assembly, Replacement Furnace, Exploded View › Burner Assembly) and 85 manufacturer part numbers. 15 parts are marked as superseded — the description gives the replacement number to order instead.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 › Combustion Chamber-blower Asm

Components

48 items

1. #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NT-34M/ NT-24S/ NT-30S/ NT-34S/ NT-24SP/ NT-30SP/ NT-34SP/ NT-40/ P-30/ P-40; Also Use New Number 525011 MFR # 71076 Superseded: see description
2. #GASKET,BURNER USE 71076 MFR # 70398 Superseded: see description
3. #APPLIANCE COMPONENTS RV; Sail Switch MFR # 230933
4. #Furnace Low Air Flow Switch; For Suburban Furnace NT-12S/ NT-12SE/ NT-16S/ NT-16SE/ NT-20S/ NT-20SE; Also Use New Number 233352 MFR # 233100 Superseded: see description
5. #SCREW MFR # 121451
6. #Furnace Low Air Flow Switch; For Suburban Furnace NT-12S/ NT-12SE/ NT-16S/ NT-16SE/ NT-20S/ NT-20SE; Also Use New Number 525028 MFR # 233352 Superseded: see description
7. #CHAMBER MFR # 20839
8. #Nut; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; Fits Furnace Combustion Air Housing; Locking; #10-24 Thread Size MFR # 120717
9. #CHAMBER/SHIELD MFR # 20833
10. #APPLIANCE COMPONENTS RV; #8 Screw MFR # 120158
11. #APPLIANCE COMPONENTS RV; GROMMET MFR # 70243
12. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
13. #RADIATION SHIELD BACKWALL ASSEMBLY MFR # 110366
14. #APPLIANCE COMPONENTS RV; BRKT HSG COMB AIR MTG MFR # 62290
15. #Furnace Room Air Impeller; For Suburban Furnace NT-12S/ NT-16S/ NT-20S/ NT-12SE/ NT-16SE/ NT-20SE MFR # 350083
16. #MOTOR USE 232877 MFR # 230616 Superseded: see description
17. #APPLIANCE COMPONENTS RV; Washer Flat 7/32Idx1/2Od MFR # 120684
18. #Furnace Motor Mounting Grommet; Replacement For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; Rubber MFR # 530089
19. #Furnace Motor; For Suburban Furnace NT-12S/ NT-12SE/ NT12-LE/ NT-16LE/ NT-16SE (Below Serial Number 000303844) MFR # 520949
20. #APPLIANCE COMPONENTS RV; Nut 10-32 Hex Lock MFR # 120716
21. #APPLIANCE COMPONENTS RV; Motor MFR # 232877
22. #Furnace Gasket; Furnace Motor Gasket; Fits Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE MFR # 70448
23. #Furnace Combustion Air Housing; Replacement For Suburban NT12/ NT16/ NT20 Series Furnaces MFR # 390223
24. #APPLIANCE COMPONENTS RV; BRKT COMB AIR HSG MFR # 62392
25. #BOX,COMBUSTION AIR USE 390222BK MFR # 390222 Superseded: see description
26. #Furnace Combustion Air Housing Cover; For Suburban Furnace NT-12/ NT-16/ NT-20 Series MFR # 390222BK
27. #Furnace Gasket; Furnace Combustion Air Box Gasket; Fits Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE MFR # 70446
28. #Furnace Combustion Wheel; For Suburban Furnace NT-12S/ NT-12SE/ NT-16S/ NT-16SE/ NT-20S/ NT-20SE MFR # 350082
29. #APPLIANCE COMPONENTS RV; Gskt Burner Tunnel MFR # 70450
30. #APPLIANCE COMPONENTS RV; Screw 6 X 5/8 Ph Ph MFR # 121357
31. #Furnace Time Delay Relay; For Suburban Furnace NT-12S/ NT-16S/ NT-20S/ NT-12SE/ NT-16SE/ NT-20SE/ NT-25/ NT-30/ NT-35/ SF-20/ SF-25/ SF-30/ SF-35/ SF-42/ SF-20F/ SF-25F/ SF-30F/ SF-35F/ SF-42F/ NT-24S/ NT-30S/ NT-34S/ NT-24SP/ NT-30SP/ NT-34SP/ NT-40 (NT24/30/34 S And SP Only Above Serial Number 1600851); 12 Volt MFR # 521069
32. #APPLIANCE COMPONENTS RV; Relay MFR # 230625
33. #LIMIT SW MFR # 233484
34. #Furnace Limit Switch; For Suburban Furnace NT-12/ NT-16/ NT-20/ NT-12S/ NT-16S/ NT-20S MFR # 230621
35. #SCREW #6 x 1/4 (2 REQ.) MFR # 120714
36. #GATEKING-F150 (04-14) MFR # 230714
37. #UNIVERSAL IGN BRD SMALL MFR # UIBS
38. #UIB L WITH POST TOP MFR # UIBLPOST
39. #UIB S WITH POST TOP MFR # UIBSPOST
40. #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
41. #FUSE MFR # 230709
42. #UNIVERSAL IGN BRD LARGE MFR # UIBL
43. #Furnace Wiring Harness; For Suburban Furnace DD17DSI/ NT-Series MFR # 232161
44. #Ignition Control Circuit Board Cover; Replacement For Dinosaurs Universal Igniter Boards; Large; White; Fire Retardant ABS Plastic MFR # LCVR
45. #SCREW, #8 X 3/4 MFR # 121296
46. #BOARD,MODULE USE 520741 (05152435103) MFR # 230587 Superseded: see description
47. #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
48. #COVER FOR UIB S MFR # SMALLCOVER

Exploded View › Cabinet Assembly

Components

16 items

1. #FRONT,CABINET MFR # 30490
2. #CABINET ASSEMBLY MFR # 100885
3. #NUT, #8-32 HEX LOCK (4 REQUIRED) MFR # 121402
4. #DOOR STRIKE MFR # 150065
5. #LATCH DOOR -NLA MFR # 150064
6. #APPLIANCE COMPONENTS RV; Screw 10 X 3/4 Ph Ph MFR # 121224
7. #APPLIANCE COMPONENTS RV; BUSHING UNIV MFR # 70486
8. #NR616319BWH WHITE BASE MFR # 50603
9. #APPLIANCE COMPONENTS RV; Tube Exh Int MFR # 50454
10. #NR61633030 MOUNTING MFR # 50605
11. #Screw; For Suburban Furnace Exhaust Vent; 8 X 3-1/4; Set Of 2 MFR # 121711
12. #VENT CAP/RANGE SHIELD MFR # 260572
13. #Furnace Vent; For Suburban Furnace NT-12S/ NT-12SE/ NT-16S/ NT-16SE/ NT-20S/ NT-20SE; Exhaust Vent Cap; With Vent Extension Tube MFR # 260098
14. #THERMOSTAT MFR # 160819
15. #CABINET COMPLETE ASSEMBLY (NOT SHOWN) MFR # 100927
16. #Furnace Duct Cover Plate; Fits Suburban 4 Inch Duct MFR # 50733

Replacement Furnace

Components

2 items

1. #USE 79-1814 MFR # NT12SEN Superseded: see description
2. #USE 79-1806 MFR # NT12SN Superseded: see description

Exploded View › Burner Assembly

Components

22 items

1. #APPLIANCE COMPONENTS RV; Orifice #60 MFR # 180225
2. #APPLIANCE COMPONENTS RV; #8 Screw MFR # 120158
3. #MANIFOLD W/ORIFICE MFR # 170616
4. #Furnace Gasket; Furnace Manifold Gasket; Fits Suburban Furnace NT-12S/ NT-16S/ NT-16SE/ NT-16SQ/ NT-20S/ NT-20SE/ NT-20SQ MFR # 70449
5. #REPLMT METAL SOCKET MFR # 10595
6. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
7. #GASKET, PILOT BURNER USE 71076 MFR # 70163 Superseded: see description
8. #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
9. #BRAKET, MANIFOLD MFR # 62288
10. #Screw; For Suburban Furnace NT-Series; Fits Suburban Furnace Combustion Chamber; #10 x 3/8 Inch MFR # 121252
11. #APPLIANCE COMPONENTS RV; Cover Plate MFR # 290120
12. #Furnace Access Door Sight Glass; Replacement For Suburban Furnace NT-Series/ P-45M/ P-45S MFR # 310026
13. #5 WIRE FLAT VEHICLE END MFR # 30485
14. #APPLIANCE COMPONENTS RV;;Screw 8-32 X 3/8 Hex Hd MFR # S6U121407
15. #STRAP, GROUND MFR # 230173
16. #VALVE,SHUTOFF MFR # 160740
17. #SUBURBAN VALVE MFR # 161123
18. #VALVE,GAS USE 161078 MFR # 160832 Superseded: see description
19. #VALVE, GAS USE 161123 MFR # 161078 Superseded: see description
20. #WIRE, IGNITION USE 318060002 MFR # 230350 Superseded: see description
21. #WIRE,HIGH VOLTAGE USE 231713 MFR # 318060002 Superseded: see description
22. #APPLIANCE COMPONENTS RV; Wire Electrode - N.L.A. MFR # 231713