Suburban Nt Series NT12F Parts Diagram · Replacement

Furnace · 4 assemblies · 8 diagram sheets · 77 parts · by Andrew Strick, mobile RV technician

OEM exploded parts diagrams for the Suburban Nt Series NT12F RV furnace: 4 assemblies (Replacement, Exploded View › Cabinet & Vent Asm. & T-stat, Exploded View › Burner Assembly, Exploded View › Combustion Chamber-blower Asm) and 77 manufacturer part numbers. 14 parts are marked as superseded — the description gives the replacement number to order instead.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.

Replacement

Components

2 items

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 #USE 79-1814 MFR # NT12SEN Superseded: see description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 #USE 79-1806 MFR # NT12SN Superseded: see description

Exploded View › Cabinet & Vent Asm. & T-stat

Components

17 items

1. #MOKI ASCENT MFR # 100662
2. #SIDE MOUNT BOLT-LONG STUD MFR # 30400
3. #CABINET,FRONT OUTER MFR # 100608
4. #CABINET,OUTER ASM MFR # 100735
5. #APPLIANCE COMPONENTS RV;;Collar Duct MFR # 50296
6. #BACK,CABINET MFR # 100604
7. #VENT CAP USE 260541 MFR # 260126 Superseded: see description
8. #Furnace Vent; For Suburban Furnace NT-Series MFR # 260541
9. #CAP,VENT USE 260126 NT16F MFR # 260097 Superseded: see description
10. #N/A SCREW #10 X 1 3/4" MFR # 121383
11. #Wall Thermostat; Single Stage; Snap-Action; Low Voltage; Heat Only; 24 Volt; White MFR # 01C20102S1
12. #Wall Thermostat; Single Stage; For Heat/ Cool Control; Mechanical Readout; 12 Volt; Without Fan Speed Control; Without Fan On Mode MFR # 100402
13. #APPLIANCE COMPONENTS RV; Thermostat 3 Day Program MFR # 1F80R850
14. #Wall Thermostat; Heat Only; Mechanical; 1 Stage; White; MFR # 1C20101
15. #T-STAT USE 100402 MODEL NT30M MFR # 160737 Superseded: see description
16. #Wall Thermostat; Single Stage; For Heat And Cool Control; Programmable; Digital Display; 24 Volt; Battery Powered MFR # 1F87R875
17. #Furnace Duct Cover Plate; Fits Suburban 4 Inch Duct MFR # 50733

Exploded View › Burner Assembly

Components

24 items

1. #APPLIANCE COMPONENTS RV; Orifice Main Burner #62 MFR # 180106
2. #MOUNTING BRACKETMEDIUM1220 AMP MFR # 10532
3. #VALVE KIT USE 160911 & 170545 MFR # 520423 Superseded: see description
4. #Propane Adapter Fitting; Fits Suburban Part Numbers 171171/ 171172/ 171325/ 171326/ 171334/ 171406/ 171407/ 171443/ 171444/ 171445/ 211497/ 520423 MFR # 170545
5. #VALVE USE 520423 MFR # 160762 Superseded: see description
6. #VALVE,GAS MFR # 160911
7. #BURNER ASM W/AIR SHUTTER ROD MFR # 10519
8. #BURNER ASM MFR # 140091
9. #PIPE,MANIFOLD MFR # 170550
10. #ELBOW, SQUARE (1/8 NPT) MFR # 170549
11. #WINCH HANDLE #6307 MFR # 70304
12. #303 MARINE TOUCHLESS SEALANT 1 GAL MFR # 30399
13. #APPLIANCE COMPONENTS RV; Holder Orifice MFR # 170543
14. #NIPPLE,PIPE 1/8" MFR # 170554
15. #NIPPLE, PIPE (3/8" x 4 1/4" BLACK IRON) MFR # 170353
16. #NIPPLE (3/8 x 2") MFR # 170373
17. #APPLIANCE COMPONENTS RV; Elbow 90 Deg MFR # 170082
18. #BRACKET, VALVE MOUNTING MFR # 62229
19. #BRACKET, VALVE MOUNTING, TOP MFR # 62232
20. #GASKET,BURNER USE 71076 MFR # 70398 Superseded: see description
21. #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
22. #Furnace Gasket; Furnace Manifold Gasket; Fits Suburban Furnace NT-12S/ NT-16S/ NT-16SE/ NT-16SQ/ NT-20S/ NT-20SE/ NT-20SQ MFR # 70449
23. #COMPLETE MANIFOLD ASSEMBLY MFR # 170551
24. #VALVE,SHUT OFF MFR # 160683

Exploded View › Combustion Chamber-blower Asm

Components

35 items

1. #CHAMBER,COMBUSTION NT12 C MFR # 110337
2. #SWITCH,LIMIT MFR # 230303
3. #APPLIANCE COMPONENTS RV; Fan Switch MFR # 230316
4. #HOUSING, BLOWER ASSY MFR # 390180
5. #10-INCH 4-OHM MARINE SUBWOOFER MFR # 92622
6. #MOUNT,MOTOR USE 92622 NT12C/16C MFR # 61873 Superseded: see description
7. #N/A HOUSING,COMBUSTION AIR BLOWER MFR # 390209
8. #APPLIANCE COMPONENTS RV; SCOOP BLOWER MFR # 62239
9. #WHEEL,COMBUSTION MFR # 350063
10. #WHEEL,BLOWER NT12/12F MFR # 350067
11. #APPLIANCE COMPONENTS RV; Motor MFR # 230306
12. #THERMOSTAT RELAY MFR # 230423
13. #GASKET,CROSSOVER TUBE MFR # 70412
14. #TUBE,CROSSOVER MFR # 50475
15. #TUBE FOR GASKET USE 70412 MFR # 70290 Superseded: see description
16. #APPLIANCE COMPONENTS RV; Hole Cover MFR # 290117
17. #APPLIANCE COMPONENTS RV;;Gskt Cov Obs Hole N /L/A MFR # S6U70367
18. #APPLIANCE COMPONENTS RV; Electrode MFR # 230511
19. #GASKET, PILOT BURNER USE 71076 MFR # 70163 Superseded: see description
20. #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
21. #BOARD,MODULE USE 520741 (05152435103) MFR # 230587 Superseded: see description
22. #COVER FOR UIB S MFR # SMALLCOVER
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. #UNIVERSAL IGN BRD LARGE MFR # UIBL
25. #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
26. #UIB L WITH POST TOP MFR # UIBLPOST
27. #Furnace Wiring Harness; For Suburban Furnace DD17DSI/ NT-Series MFR # 232161
28. #UIB S WITH POST TOP MFR # UIBSPOST
29. #UNIVERSAL IGN BRD SMALL MFR # UIBS
30. #Ignition Control Circuit Board Cover; Replacement For Dinosaurs Universal Igniter Boards; Large; White; Fire Retardant ABS Plastic MFR # LCVR
31. #UIB WITH FAN CONTROL MFR # FAN50PLUS
32. #SWITCH,SAIL NT12F/NT12C MFR # 230447
33. #BRACKET, CROSSOVER TUBE MFR # 62218
34. #BLOWER ASSY, COMPLETE MFR # 520027
35. #AC/DC CONVERTER PACKAGE (NDP-24) MFR # 520011S