Suburban Nt Series NT42T Parts Diagram · Exploded View › Cabinet Assembly

Furnace · 5 assemblies · 10 diagram sheets · 103 parts · by Andrew Strick, mobile RV technician

OEM exploded parts diagrams for the Suburban Nt Series NT42T RV furnace: 5 assemblies (Exploded View › Cabinet Assembly, Replacement, Exploded View › Burner Assembly, Exploded View › Combustion Chamber, Exploded View › Blower Assembly) and 103 manufacturer part numbers. 24 parts are marked as superseded — the description gives the replacement number to order instead.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

13 items

1. #NR627947 RETAINER-PANEL-12 UPR-BLK MFR # 50715
2. #GSKT COLLAR FLUE MFR # 70612
3. #CABINET FRONT ASSY COMPLETE ITEMS 4, 5, 6 MFR # 101002
4. #APPLIANCE COMPONENTS RV; Screw 10 X 3/4 Ph Ph MFR # 121224
5. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
6. #T-STAT, WALL USE 100402 MFR # 160902 Superseded: see description
7. #Wall Thermostat; Single Stage; For Heat/ Cool Control; Mechanical Readout; 12 Volt; Without Fan Speed Control; Without Fan On Mode MFR # 100402
8. #Wall Thermostat; Single Stage; Snap-Action; Low Voltage; Heat Only; 24 Volt; White MFR # 01C20102S1
9. #Wall Thermostat; Single Stage; For Heat And Cool Control; Programmable; Digital Display; 24 Volt; Battery Powered MFR # 1F87R875
10. #Wall Thermostat; Heat Only; Mechanical; 1 Stage; White; MFR # 1C20101
11. #APPLIANCE COMPONENTS RV; Thermostat 3 Day Program MFR # 1F80R850
12. #Furnace Power Supply Wiring Harness; For Suburban Furnace; With 3-Pin Female Connector MFR # 230789
13. #Furnace Duct Cover Plate; Fits Suburban 4 Inch Duct MFR # 50733

Replacement

Components

2 items

1. #Furnace Core; NT Series; LP Gas; Model Number NT-40; 40,000 BTU; 9.5 Amp Draw; 12 Inch Width x 12-1/2 Inch Height x 23 Inch Depth; 25.55 Pounds; With Energy-Saving Electronic Ignition; With Gasket-Sealed Vent Assembly MFR # NT40N
2. #FURNACE 45000 BTU 13 1/2H X 20 1/4W X 24D MFR # NT45SN

Exploded View › Burner Assembly

Components

12 items

1. #BURNER - NLA NT42T MFR # 10639
2. #Furnace Burner Orifice; For Suburban Furnace SF-42/ SF-42/ NT-40/ P-40 MFR # 180216
3. #Furnace Gasket; Furnace Manifold Gasket; Fits Suburban Furnace NT-24SP/ NT-30SP/ NT-34SP/ NT-40/ P-30S/ P-40/ P-40B MFR # 70408
4. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
5. #MANIFOLD ASM MFR # 170924
6. #VALVE, GAS USE 161123 MFR # 161078 Superseded: see description
7. #VALVE,GAS USE 161078 MFR # 160832 Superseded: see description
8. #SUBURBAN VALVE MFR # 161123
9. #BRACKET, VALVE MOUNTING MFR # 62571
10. #APPLIANCE COMPONENTS RV; #8 Screw MFR # 120158
11. #APPLIANCE COMPONENTS RV; St Ell MFR # 170012
12. #VALVE,SHUTOFF MFR # 160740

Exploded View › Combustion Chamber

Components

53 items

1. #APPLIANCE COMPONENTS RV; Screw 8-32 X 3/8 Hex Hd MFR # 121407
2. #Igniter Electrode; For Suburban Furnace Models NT-24M/ NT-30M/ NT-34M; Without Gasket MFR # 520733MC
3. #APPLIANCE COMPONENTS RV; Ignitor Wire MFR # 230949
4. #APPLIANCE COMPONENTS RV; Wire Electrode - N.L.A. MFR # 231713
5. #Furnace Wiring Harness; Use With All Suburban Model NT And P Series Electrode Furnaces; 22 Inch Length MFR # 231261 Superseded: see description
6. #Igniter Electrode; For Suburban Furnace Models P-30S/ P-40S/ NT-30/ NT-34/ NT-24/ NT-30/ NT-34/ NT-24/ NT-30S/ NT-34S/ NT-24S/ NT-34S/ NT-30SP/ NT-34SP/ NT-24SP/ NT-30SP/ NT-34SP; Without Gasket MFR # 230956mc
7. #Igniter Electrode; For Suburban Furnace P-30S/ P-40S/ NT-30/ NT-34/ NT-24/ NT-30/ NT-34/ NT-24/ NT-30S/ NT-34S/ NT-24S/ NT-34S/ NT-30SP/ NT-34SP/ NT-24SP/ NT-30SP/ NT-34SP; Without Gasket; Also Use New Number 525019 MFR # 230956 Superseded: see description
8. #Igniter Electrode; For Suburban Furnace NT-24M/ NT-30M/ NT-34M; Without Gasket MFR # 520733
9. #WIRE,HIGH VOLTAGE USE 231713 MFR # 318060002 Superseded: see description
10. #APPLIANCE COMPONENTS RV; Nut 10-24 Hex Lock (Std) MFR # 121421
11. #Furnace Access Door; For Suburban Furnace NT40; Burner Access Panel Assembly MFR # 30764
12. #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
13. #GASKET, PILOT BURNER USE 71076 MFR # 70163 Superseded: see description
14. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
15. #GASKET,BURNER USE 71076 MFR # 70398 Superseded: see description
16. #CHAMBER/SHIELD - NLA MFR # 20928S
17. #CHAMBER USE 20928S MFR # 20927 Superseded: see description
18. #APPLIANCE COMPONENTS RV; #8 Screw MFR # 120158
19. #Furnace Limit Switch; For Suburban Furnace NT-42TS/ NT-42T MFR # 230888
20. #Screw; For Suburban Furnace NT-Series; Fits Suburban Furnace Combustion Chamber; #10 x 3/8 Inch MFR # 121252
21. #APPLIANCE COMPONENTS RV; Bushing MFR # 70362
22. #GATEKING-F150 (04-14) MFR # 230714
23. #SCREW #6 x 1/4 (2 REQ.) MFR # 120714
24. #APPLIANCE COMPONENTS RV; Bushing Snap 1/2" MFR # 70270
25. #WATER FLANGE WHIT PLASTC MFR # 62135
26. #UNIVERSAL IGN BRD LARGE MFR # UIBL
27. #Furnace Wiring Harness; For Suburban Furnace DD17DSI/ NT-Series MFR # 232161
28. #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
29. #Ignition Control Circuit Board Cover; Replacement For Dinosaurs Universal Igniter Boards; Large; White; Fire Retardant ABS Plastic MFR # LCVR
30. #COVER FOR UIB S MFR # SMALLCOVER
31. #UIB WITH FAN CONTROL MFR # FAN50PLUS
32. #UIB L WITH POST TOP MFR # UIBLPOST
33. #UNIVERSAL IGN BRD SMALL MFR # UIBS
34. #UIB S WITH POST TOP MFR # UIBSPOST
35. #BOARD,MODULE USE 520741 (05152435103) MFR # 230587 Superseded: see description
36. #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
37. #APPLIANCE COMPONENTS RV; Screw 6 X 5/8 Ph Ph MFR # 121357
38. #APPLIANCE COMPONENTS RV; Insulation MFR # 70538
39. #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
40. #BOARD,CHANNEL USE 520741 MFR # 231328 Superseded: see description
41. #BURNER, LARGE W/AIR SHUTTER USE 520564 MFR # 3000003 Superseded: see description
42. #APPLIANCE COMPONENTS RV; Panel Mod Board MFR # 90301
43. #Furnace Time Delay Relay; Use With Suburban Furnace Models NT-24-S/ NT-24-SP/ NT-30-S/ NT-30-SP/ NT-34-S/ NT-40/ P-30-S/ P-40-S; 24 Volt MFR # 231202MC Superseded: see description
44. #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
45. #APPLIANCE COMPONENTS RV; Relay Switch MFR # 231202
46. #IGNITOR BOARDS AND ACCESS MFR # 12VDCTDR
47. #Furnace Time Delay Relay; Replacement For Older Furnaces That Use A Standard 12 Volt DC Igniter Board; Micro Controlled; 12 Volt DC; 1-1/2 Inch x 1-1/2 Inch; 4 Second Delay; 2 Minute Cool Down Period At The End Of The Heat Cycle; Also Use New Number 12VDCTDR MFR # 48000D Superseded: see description
48. #APPLIANCE COMPONENTS RV; VENT CAP WITH RAIN SHIELD MFR # 260560
49. #CAP,VENT/EXH TUBE -USE 79-8862 OR 260350 MFR # 260123 Superseded: see description
50. #TUBE VENT USE 47-1893 OR 52041 MFR # 50933 Superseded: see description
51. #SHIELD ASM MFR # 110506S
52. #NR619033 BIN-DOOR SHELF MFR # 50633
53. #APPLIANCE COMPONENTS RV; Screw 10 X 3/4 Ph Ph MFR # 121224

Exploded View › Blower Assembly

Components

29 items

1. #Furnace Blower Wheel; For Suburban Furnace NT-40 MFR # 350098
2. #Screw; For Suburban Furnace NT-Series; Fits Suburban Furnace Combustion Chamber; #10 x 3/8 Inch MFR # 121252
3. #APPLIANCE COMPONENTS RV; Hsg Blower MFR # 390384
4. #APPLIANCE COMPONENTS RV; Hsg Blower MFR # 390384BK
5. #Screw; Use With Suburban Furnace Model NT40; Phillips Head; 10-24 x 1/2 MFR # 121227 Superseded: see description
6. #Furnace Low Air Flow Switch; For Suburban Furnace NT-40; Also Use New Number 233355 MFR # 232279 Superseded: see description
7. #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
8. #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
9. #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
10. #Furnace Low Air Flow Switch; For Suburban Furnace NT-40 MFR # 233355
11. #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
12. #APPLIANCE COMPONENTS RV; Fastener Tinnerman MFR # 121661
13. #Screw; Furnace Blower Screw; #10 x 1/4 Inch; Single MFR # 121577
14. #Furnace Motor Bracket; For Suburban NT-40 MFR # 62138
15. #Nut; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; Fits Furnace Combustion Air Housing; Locking; #10-24 Thread Size MFR # 120717
16. #Furnace Gasket; Furnace Crossover Tube Gasket; Fits Suburban Furnace NT-24M/ NT-30M/ NT-30SP/ NT-34SP/ NT-40 MFR # 70385
17. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
18. #KIT MOTOR/MTG BRKTS MFR # 521138
19. #Furnace Motor; For Suburban Furnace Models NT-34M/ NT-34S/ NT-34SP/ NT-40S/ NT-42S/ NT-42T; Also Use New Number 521138MC MFR # 231208MC Superseded: see description
20. #MOTOR, BLOWER (169) 231208 MFR # PE2787Q
21. #Furnace Motor; For Suburban Furnace NT-34M/ NT-34S/ NT-34SP/ NT-40S/ NT-42S/ NT-42T MFR # 231208
22. #Furnace Gasket; Motor Mount Gasket; Fits Suburban Furnace NT-40 MFR # 70384
23. #APPLIANCE COMPONENTS RV; Suburban Comb Air Housing MFR # 390179
24. #APPLIANCE COMPONENTS RV; Screw #10-16 X 1/2 MFR # 121436
25. #WHEEL COMB AIR - obsolete MFR # 350077
26. #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
27. #Furnace Combustion Air Housing Cover; For Suburban Furnace NT30SP/ NT34SP/ NT40 MFR # 390424
28. #Furnace Combustion Air Housing Cover Mounting Clip; For Suburban Furnace NT24BW/ NT30SP/ NT24SP/ NT34SP/ NT40/ NT42T/ NT34BW/ NT30BW/ P30S/ P40/ P40S MFR # 121712
29. #APPLIANCE COMPONENTS RV; Screw 8 X 1/2 Ph Ph MFR # 120615