Suburban Nt Series NT25K Parts Diagram · Exploded View › Cabinet Assembly

Furnace · 5 assemblies · 5 diagram sheets · 91 parts · by Andrew Strick, mobile RV technician

OEM exploded parts diagrams for the Suburban Nt Series NT25K RV furnace: 5 assemblies (Exploded View › Cabinet Assembly, Exploded View › Blower Assembly, Exploded View › Burner Assembly, Exploded View › Combustion Chamber, Replacement) and 91 manufacturer part numbers. 13 parts are marked as superseded — the description gives the replacement number to order instead.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 › Cabinet Assembly

Components

16 items

1. #APPLIANCE COMPONENTS RV; Screw 10 X 3/4 Ph Ph MFR # 121224
2. #VENT CAP - NLA MFR # 260156
3. #APPLIANCE COMPONENTS RV; Vent Cap/Tube MFR # 260157
4. #TUBE INT MFR # 50869
5. #Furnace Duct Cover Plate; Fits Suburban 4 Inch Duct MFR # 50733
6. #NR627947 RETAINER-PANEL-12 UPR-BLK MFR # 50715
7. #APPLIANCE COMPONENTS RV; Cabinet Front MFR # 101082
8. #APPLIANCE COMPONENTS RV; #8 Screw MFR # 120158
9. #APPLIANCE COMPONENTS RV; Bushing Snap MFR # 70472
10. #Wall Thermostat; Heat Only; Mechanical; 1 Stage; White; MFR # 1C20101
11. #Wall Thermostat; Single Stage; For Heat/ Cool Control; Mechanical Readout; 12 Volt; Without Fan Speed Control; Without Fan On Mode MFR # 100402
12. #Wall Thermostat; Single Stage; Snap-Action; Low Voltage; Heat Only; 24 Volt; White MFR # 01C20102S1
13. #T-STAT, WALL USE 100402 MFR # 160902 Superseded: see description
14. #APPLIANCE COMPONENTS RV; Thermostat 3 Day Program MFR # 1F80R850
15. #Wall Thermostat; Single Stage; For Heat And Cool Control; Programmable; Digital Display; 24 Volt; Battery Powered MFR # 1F87R875
16. #APPLIANCE COMPONENTS RV; Cab MFR # 101087

Exploded View › Blower Assembly

Components

21 items

1. #APPLIANCE COMPONENTS RV; #8 Screw MFR # 120158
2. #HOUSING,COMBUSTION AIR HSG LEFT MFR # 390365
3. #WHEEL,COMBUSTION AIR NT30 K MFR # 350118
4. #APPLIANCE COMPONENTS RV; Motor MFR # 231166
5. #Furnace Gasket; Furnace Combustion Air Housing Gasket; Fits Suburban Furnace NT-25K/ NT-30K/ NT-35K MFR # 70406
6. #APPLIANCE COMPONENTS RV; Hsg Comb Air MFR # 390376
7. #GSKT MOTOR - NA MFR # 70706
8. #GSKT TUBE CROSSOVER MFR # 70704
9. #CROSSOVER TUBE ASSEMBLY MFR # 50825
10. #SPRING SUPPORT HINGE MFR # 70705
11. #APPLIANCE COMPONENTS RV; Bushing MFR # 70362
12. #APPLIANCE COMPONENTS RV; Nut 10-32 Hex Lock MFR # 120716
13. #APPLIANCE COMPONENTS RV; Hsg Blower MFR # 390371
14. #APPLIANCE COMPONENTS RV; Fastener Tinnerman MFR # 121661
15. #Furnace Low Air Flow Switch; For Suburban Furnace NT-40 MFR # 233355
16. #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 # 230509 Superseded: see description
17. #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
18. #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
19. #Furnace Low Air Flow Switch; For Suburban Furnace NT-40; Also Use New Number 233355 MFR # 232279 Superseded: see description
20. #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
21. #APPLIANCE COMPONENTS RV; Wheel Room Air MFR # 350105

Exploded View › Burner Assembly

Components

13 items

1. #GSKT MANIFOLD MFR # 70698
2. #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
3. #APPLIANCE COMPONENTS RV; #8 Screw MFR # 120158
4. #96' TOP MOUNT BOX MFR # 170961
5. #SUBURBAN VALVE MFR # 161123
6. #VALVE,GAS USE 161078 MFR # 160832 Superseded: see description
7. #VALVE, GAS USE 161123 MFR # 161078 Superseded: see description
8. #APPLIANCE COMPONENTS RV; Screw 8-32 X 3/8 Hex Hd MFR # 121407
9. #BRACKET, VALVE MOUNTING MFR # 62711
10. #APPLIANCE COMPONENTS RV; Tinnerman "U" Clip MFR # 121595
11. #VALVE,SHUTOFF MFR # 160740
12. #Nut; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; Fits Furnace Combustion Air Housing; Locking; #10-24 Thread Size MFR # 120717
13. #BURNER MFR # 10693

Exploded View › Combustion Chamber

Components

42 items

1. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
2. #APPLIANCE COMPONENTS RV; #8 Screw MFR # 120158
3. #APPLIANCE COMPONENTS RV; Electrode MFR # 231168
4. #APPLIANCE COMPONENTS RV; Hole Cover MFR # 290117
5. #APPLIANCE COMPONENTS RV; Gskt Cov Obs Hole N /L/A MFR # 70367
6. #GASKET, PILOT BURNER USE 71076 MFR # 70163 Superseded: see description
7. #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
8. #APPLIANCE COMPONENTS RV; Suburban Nut MFR # 121669
9. #APPLIANCE COMPONENTS RV; Bushing MFR # 70362
10. #Screw; For Suburban Furnace NT-Series; Fits Suburban Furnace Combustion Chamber; #10 x 3/8 Inch MFR # 121252
11. #LIMIT SW MFR # 231203
12. #APPLIANCE COMPONENTS RV; Screw 6X3/8 Ph Rh Black MFR # 121502
13. #APPLIANCE COMPONENTS RV; Relay MFR # 230625
14. #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
15. #Screw; For Suburban Furnace NT-24SP/ NT-30SP/ NT-34SP; 6 x 1/4 Inch MFR # 121244
16. #GATEKING-F150 (04-14) MFR # 230714
17. #COVER,BURNER ACCESS MFR # 90320
18. #Stove Mounting Bracket; For Suburban Range; Angled; Single MFR # 122060
19. #APPLIANCE COMPONENTS RV; Sububan Tinnerman Fastene MFR # 121662
20. #PANEL,MOUNTING F/MODULE BOARD MFR # 101081
21. #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
22. #Water Heater Burner; Large; For Suburban Water Heater SSRV6/ SSRV6M/ ESSRV6/ SSRV8/ SSRV8M/ ESSRV8/ SSRV10/ SSRV10M/ ESSWRV10/ 10ARVM/ E10ARV; With Target/ Burner Support Bracket/ Shutter/ Screw/ Nut/ Pilot Bracket/ Pilot Burner/ Thermocouple/ Tube/ Tube Fitting MFR # 520564
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. #UIB WITH FAN CONTROL MFR # FAN50PLUS
25. #APPLIANCE COMPONENTS RV; Insul Mod Board MFR # 70807
26. #BOARD,MODULE USE 520741 MFR # 231741 Superseded: see description
27. #UNIVERSAL IGN BRD SMALL MFR # UIBS
28. #UIB S WITH POST TOP MFR # UIBSPOST
29. #UIB L WITH POST TOP MFR # UIBLPOST
30. #Ignition Control Circuit Board Cover; Replacement For Dinosaurs Universal Igniter Boards; Large; White; Fire Retardant ABS Plastic MFR # LCVR
31. #COVER FOR UIB S MFR # SMALLCOVER
32. #BOARD,MODULE MFR # 231427
33. #Furnace Wiring Harness; For Suburban Furnace DD17DSI/ NT-Series MFR # 232161
34. #UNIVERSAL IGN BRD LARGE MFR # UIBL
35. #CAP LUG #1-3/8 RED INSULATOR CAP F/ CIR BD MFR # 70549
36. #APPLIANCE COMPONENTS RV; Screw 6 X 5/8 Ph Ph MFR # 121357
37. #CLIP,TINNERMAN 1/8 PUSH-ON MFR # 121336
38. #6 STACKED SMALL PARTS BINS MFR # 40341
39. #FIREWALL ASSEMBLY MFR # 110529
40. #CHAMBER,COMBUSTION USE 20989 MFR # 20988 Superseded: see description
41. #CHAMBER,COMBUSTION W/FIRE WALL MFR # 20989
42. #APPLIANCE COMPONENTS RV; Screw 8-32 X 3/8 Hex Hd MFR # 121407

Replacement

Components

4 items

1. #HEATERS & FURNACES RV; 35 000 Btu Sf-35Q Heater MFR # SF35N
2. #DOOR,COL WHITE USE 6258ACW MFR # 520574 Superseded: see description
3. #HEATERS & FURNACES RV; 30 000 Btu Sf-30Q Heater MFR # SF30N
4. #FURNACE,COMPLETE 9 12H X 12 1/2W X 23D MFR # NT25KN