Suburban Nt Series NT34MM W-johnson-fenwal Valve Parts Diagram · Exploded View › Blower Assembly

Furnace · 5 assemblies · 10 diagram sheets · 121 parts · by Andrew Strick, mobile RV technician

OEM exploded parts diagrams for the Suburban Nt Series NT34MM W-johnson-fenwal Valve RV furnace: 5 assemblies (Exploded View › Blower Assembly, Exploded View › Combustion Chamber Assembly, Exploded View › Burner Assembly, Exploded View › Cabinet Assembly, Replacement) and 121 manufacturer part numbers. 27 parts are marked as superseded — the description gives the replacement number to order instead.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 › Blower Assembly

Components

32 items

1. #WHEEL,ROOM AIR USE 350113 MFR # 350076 Superseded: see description
2. #Furnace Blower Wheel; For Suburban Furnace NT-30SP/ NT-34SP MFR # 350113
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. #Furnace Low Air Flow Switch; For Suburban Furnace NT-40; Also Use New Number 233355 MFR # 232279 Superseded: see description
6. #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NT-35K/ P-30S/ SF-20/ SF-25/ SF-30/ SF-35/ SF-20F/ SF-25F/ SF-30F/ SF-35F; Also Use New Number 525024 MFR # 233356 Superseded: see description
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. #MICROSWITCH ASSEMBLY USE 230509 MFR # 230748 Superseded: see description
9. #Furnace Low Air Flow Switch; For Suburban Furnace NT-40 MFR # 233355
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NT-35K/ P-30S/ SF-20/ SF-25/ SF-30/ SF-35/ SF-20F/ SF-25F/ SF-30F/ SF-35F; Also Use New Number 233356 MFR # 230509 Superseded: see description
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 #Screw; Use With Suburban Furnace Part Numbers NT-16SE/ NT-20SE; # 2; 56 Inch x 5/8 Inch; Hex Head MFR # 121247 Superseded: see description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; Washer Lock #2 MFR # 121364
13. #NUT HEX 2-56 MFR # 120672
14. #Screw; Use With Suburban Furnace Model NT40; Phillips Head; 10-24 x 1/2 MFR # 121227 Superseded: see description
15. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
16. #Furnace Motor Bracket; For Suburban NT-40 MFR # 62138
17. #Nut; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; Fits Furnace Combustion Air Housing; Locking; #10-24 Thread Size MFR # 120717
18. #Furnace Motor; For Suburban Furnace NT-34M/ NT-34S/ NT-34SP/ NT-40S/ NT-42S/ NT-42T MFR # 231208
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. #KIT MOTOR/MTG BRKTS MFR # 521138
21. #MOTOR, BLOWER (169) 231208 MFR # PE2787Q
22. #MOTOR,BLOWER USE 231381 MFR # 230744 Superseded: see description
23. #Furnace Gasket; Motor Mount Gasket; Fits Suburban Furnace NT-40 MFR # 70384
24. #APPLIANCE COMPONENTS RV; Suburban Comb Air Housing MFR # 390179
25. #APPLIANCE COMPONENTS RV; Screw #10-16 X 1/2 MFR # 121436
26. #WHEEL COMB AIR - obsolete MFR # 350077
27. #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
28. #CHAMBER,COMBUSTION MFR # 390173
29. #Furnace Gasket; Furnace Crossover Tube Gasket; Fits Suburban Furnace NT-24M/ NT-30M/ NT-30SP/ NT-34SP/ NT-40 MFR # 70385
30. #TUBE,CROSSOVER USE 50751 MFR # 50439 Superseded: see description
31. #DIODE RECTIFIER MFR # 230297
32. #VALVE,SHUTOFF MFR # 160740

Exploded View › Combustion Chamber Assembly

Components

55 items

1. #Screw; For Suburban Furnace NT-Series; Fits Suburban Furnace Combustion Chamber; #10 x 3/8 Inch MFR # 121252
2. #SCREW, BURNER MOUNTING #10 - 24 X 3/8 (2 REQ.) MFR # 121460
3. #APPLIANCE COMPONENTS RV; #8 Screw MFR # 120158
4. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
5. #COVER,AIR ADJ HOLE MFR # 290119
6. #APPLIANCE COMPONENTS RV; Gskt Cov Air Adj MFR # 70389
7. #ELECTRODE USE 230590 MFR # 230480 Superseded: see description
8. #APPLIANCE COMPONENTS RV; Electrode MFR # 230590
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. #GASKET, PILOT BURNER USE 71076 MFR # 70163 Superseded: see description
11. #SCREW 8-32 X 1/2 SLOT HEX MFR # 121387
12. #STRAP, GROUND MFR # 230173
13. #DOOR,COMBUSTION CHAMBER MFR # 30451
14. #Furnace Access Door Sight Glass; Replacement For Suburban Furnace NT-Series/ P-45M/ P-45S MFR # 310026
15. #APPLIANCE COMPONENTS RV; Cover Plate MFR # 290120
16. #GASKET,BURNER USE 71076 MFR # 70398 Superseded: see description
17. #CHAMBER,COMBUSTION W/RA DIATION SHIELD MFR # 20786
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. #SWITCH,LIMIT MFR # 232578
20. #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
21. #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
22. #BUSHING MFR # 230362S
23. #COVER FOR UIB S MFR # SMALLCOVER
24. #BOARD,CHANNEL USE 520741 MFR # 231328 Superseded: see description
25. #Ignition Control Circuit Board Cover; Replacement For Dinosaurs Universal Igniter Boards; Large; White; Fire Retardant ABS Plastic MFR # LCVR
26. #UIB WITH FAN CONTROL MFR # FAN50PLUS
27. #UIB S WITH POST TOP MFR # UIBSPOST
28. #UNIVERSAL IGN BRD LARGE MFR # UIBL
29. #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
30. #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
31. #APPLIANCE COMPONENTS RV; Insulation MFR # 70538
32. #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
33. #UIB L WITH POST TOP MFR # UIBLPOST
34. #UNIVERSAL IGN BRD SMALL MFR # UIBS
35. #Furnace Wiring Harness; For Suburban Furnace DD17DSI/ NT-Series MFR # 232161
36. #BOARD,MODULE USE 520741 (05152435103) MFR # 230587 Superseded: see description
37. #APPLIANCE COMPONENTS RV; NUT HEX 6-32 MFR # 120744
38. #CAP LUG #1-3/8 RED INSULATOR CAP F/ CIR BD MFR # 70549
39. #THERMOSTAT RELAY MFR # 230423
40. #WATER FLANGE WHIT PLASTC MFR # 62135
41. #Furnace Limit Switch; For Suburban Furnace NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S (Below Serial Number 1600851) MFR # 230575
42. #Furnace Limit Switch; For Suburban Furnace Models NT-24M/ NT-30M/ NT-34M/ NT-24S/ NT-30S/ NT-34S MFR # 230575MC
43. #BRAKE CONTROL WIRIING ADAPTER TIMED & INERTIA MFR # 20270
44. #RADIATION SHIELD ASSEMBLY MFR # 110426
45. #BAFFLE, EXHAUST TUBE MFR # 40293
46. #APPLIANCE COMPONENTS RV; Screw #10-16 X 1/2 MFR # 121436
47. #SCREW,8 X 3 1/4 USE 121711 MFR # 121256 Superseded: see description
48. #Screw; For Suburban Furnace Exhaust Vent; 8 X 3-1/4; Set Of 2 MFR # 121711
49. #CAP,VENT USE 520730 MFR # 260093 Superseded: see description
50. #KIT VENT CAP MFR # 520730
51. #APPLIANCE COMPONENTS RV; Wire Electrode - N.L.A. MFR # 231713
52. #BURNER ACCESS DOOR ASSY MFR # 30506
53. #WIRE,HIGH VOLTAGE USE 231713 MFR # 318060002 Superseded: see description
54. #APPLIANCE COMPONENTS RV; Screw 10 X 3/4 Ph Ph MFR # 121224
55. #WIRE,ELECTRODE USE 318060002 MFR # 230491 Superseded: see description

Exploded View › Burner Assembly

Components

26 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. #VALVE, GAS USE 161123 MFR # 161078 Superseded: see description
9. #SUBURBAN VALVE MFR # 161123
10. #VALVE KIT USE 160911 & 170545 MFR # 520423 Superseded: see description
11. #VALVE,GAS MFR # 160911
12. #Propane Adapter Fitting; Fits Suburban Part Numbers 171171/ 171172/ 171325/ 171326/ 171334/ 171406/ 171407/ 171443/ 171444/ 171445/ 211497/ 520423 MFR # 170545
13. #VALVE,GAS USE 520423 W/MANIFOLD MFR # 160781 Superseded: see description
14. #COUPLING 1/8NPT X 3/4 MFR # 170628
15. #APPLIANCE COMPONENTS RV; Close Nipple MFR # 170546
16. #MANIFOLD ASM MFR # 170597
17. #Furnace Burner Orifice; For Suburban Furnace NT-34/ NT-34M/ NT-34S/ NT-34SP/ NT-35K/ SF-35/ SF-35F MFR # 180222
18. #Furnace Gasket; Furnace Manifold Gasket; Fits Suburban Furnace NT-24SP/ NT-30SP/ NT-34SP/ NT-40/ P-30S/ P-40/ P-40B MFR # 70408
19. #SHUTTER,AIR BURNER MFR # 10582
20. #APPLIANCE COMPONENTS RV; Pin Roll 5/32 X 1 MFR # 121398
21. #SPRING MFR # 150026
22. #APPLIANCE COMPONENTS RV; Washer Flat 7/32Idx1/2Od MFR # 120684
23. #BURNER ONLY USE 10609 MFR # 10581 Superseded: see description
24. #POWER CONTROL MODULE MFR # 10609
25. #PIN,ROLL STEEL MFR # 121250
26. #MANIFOLD & VALVE ASSEMBLY NT-34MM MFR # 170641

Exploded View › Cabinet Assembly

Components

13 items

1. #LATCH,CABINET FRONT NT24 M MFR # 62230
2. #NUT,TINNERMAN 1/4 X 1/4 MFR # 121395
3. #KNOB MFR # 140149
4. #DOOR, CABINET MFR # 100861
5. #CABINET ASSEMBLY (NT30MA) MFR # 100880
6. #APPLIANCE COMPONENTS RV;;Collar Duct MFR # 50296
7. #Wall Thermostat; Single Stage; For Heat And Cool Control; Programmable; Digital Display; 24 Volt; Battery Powered MFR # 1F87R875
8. #Wall Thermostat; Heat Only; Mechanical; 1 Stage; White; MFR # 1C20101
9. #Wall Thermostat; Single Stage; Snap-Action; Low Voltage; Heat Only; 24 Volt; White MFR # 01C20102S1
10. #T-STAT USE 100402 MODEL NT30M MFR # 160737 Superseded: see description
11. #Wall Thermostat; Single Stage; For Heat/ Cool Control; Mechanical Readout; 12 Volt; Without Fan Speed Control; Without Fan On Mode MFR # 100402
12. #APPLIANCE COMPONENTS RV; Thermostat 3 Day Program MFR # 1F80R850
13. #Furnace Duct Cover Plate; Fits Suburban 4 Inch Duct MFR # 50733

Replacement

Components

1 item

1. #Furnace Core; NT Series; LP Gas; Model Number NT-34SP; 34,000 BTU; Direct Discharge; 7.5 Amp Draw; 12 Inch Width x 12-1/2 Inch Height x 23 Inch Depth; 10.3 Pounds; With Energy-Saving Electronic Ignition; With Gasket-Sealed Vent Assembly MFR # NT34SPN