Suburban Nt Series NT45S Parts Diagram · Exploded View › Cabinet Assembly

Furnace · 5 assemblies · 10 diagram sheets · 99 parts · by Andrew Strick, mobile RV technician

OEM exploded parts diagrams for the Suburban Nt Series NT45S RV furnace: 5 assemblies (Exploded View › Cabinet Assembly, Exploded View › Burner Assembly, Replacement, Exploded View › Combustion Chamber, Exploded View › Blower Assembly) and 99 manufacturer part numbers. 13 parts are marked as superseded — the description gives the replacement number to order instead.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

19 items

1. #SCREW,8 X 3 1/4 USE 121711 MFR # 121256 Superseded: see description
2. #Screw; For Suburban Furnace Exhaust Vent; 8 X 3-1/4; Set Of 2 MFR # 121711
3. #APPLIANCE COMPONENTS RV; Screw 10 X 3/4 Ph Ph MFR # 121224
4. #KIT VENT MFR # 520510
5. #APPLIANCE COMPONENTS RV; Vent Cap- Na MFR # 260105
6. #APPLIANCE COMPONENTS RV;;Collar Duct MFR # 50296
7. #Furnace Duct Cover Plate; Fits Suburban 4 Inch Duct MFR # 50733
8. #APPLIANCE COMPONENTS RV; Sububan Tinnerman Fastene MFR # 121662
9. #Stove Mounting Bracket; For Suburban Range; Angled; Single MFR # 122060
10. #APPLIANCE COMPONENTS RV; Gskt Bottom Duct MFR # 70306
11. #APPLIANCE COMPONENTS RV; Cab Front MFR # 100942
12. #Wall Thermostat; Heat Only; Mechanical; 1 Stage; White; MFR # 1C20101
13. #T-STAT USE 161154 MFR # 160849 Superseded: see description
14. #Wall Thermostat; Single Stage; Snap-Action; Low Voltage; Heat Only; 24 Volt; White MFR # 01C20102S1
15. #APPLIANCE COMPONENTS RV; Thermostat 3 Day Program MFR # 1F80R850
16. #Wall Thermostat; Single Stage; For Heat And Cool Control; Programmable; Digital Display; 24 Volt; Battery Powered MFR # 1F87R875
17. #Wall Thermostat; Single Stage; For Heat/ Cool Control; Mechanical Readout; 12 Volt; Without Fan Speed Control; Without Fan On Mode MFR # 100402
18. #Wall Thermostat; Single Stage; For Heat Control; Mechanical Readout; White Case MFR # 161154
19. #CABINET ASSEMBLY MFR # 100944

Exploded View › Burner Assembly

Components

19 items

1. #COVER PLATE, GAS INLET MFR # 62143
2. #Furnace Gasket; Furnace Gas Inlet Tube Gasket; Fits Suburban Furnace NT-45S MFR # 70432
3. #APPLIANCE COMPONENTS RV; Elbow 90 Deg MFR # 170082
4. #PIPE, GAS INLET (SHORT) MFR # 170675
5. #GASKET, DISC COVER MFR # 170534
6. #APPLIANCE COMPONENTS RV; Disc Cov Gas Inlet MFR # 62408
7. #VALVE,SHUTOFF MFR # 160740
8. #PIPE, GAS INLET (LONG) MFR # 170671
9. #NIPPLE MFR # 170688
10. #APPLIANCE COMPONENTS RV; Gas Valve MFR # 161135
11. #Water Heater Gas Valve; Fits Maxitrol Direct Burner Electric Ignition System; 4 Terminals; 12 Volts DC MFR # CV20033
12. #VALVE, GAS USE 45-3428 3/8 X 3/8 CHECK SIZE MFR # 161090 Superseded: see description
13. #VALVE, GAS USE 45-3428 OR 161135 MFR # 160840 Superseded: see description
14. #MANIFOLD ASSEMBLY MFR # 170791
15. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
16. #APPLIANCE COMPONENTS RV; Gskt Manifold MFR # 70591
17. #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
18. #APPLIANCE COMPONENTS RV; Burner MFR # 10623
19. #APPLIANCE COMPONENTS RV; Burner MFR # 10621

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 # 2455A
2. #FURNACE 45000 BTU 13 1/2H X 20 1/4W X 24D MFR # NT45SN

Exploded View › Combustion Chamber

Components

28 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. #Nut; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; Fits Furnace Combustion Air Housing; Locking; #10-24 Thread Size MFR # 120717
4. #APPLIANCE COMPONENTS RV; Nut 10-24 Hex Lock (Std) MFR # 121421
5. #Furnace Access Door; For Suburban Furnace NT40; Burner Access Panel Assembly MFR # 30764
6. #DOOR,BURNER NT45S/P45S MFR # 30529
7. #GASKET,BURNER USE 71076 MFR # 70398 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. #Furnace Access Door Sight Glass; Replacement For Suburban Furnace NT-Series/ P-45M/ P-45S MFR # 310026
10. #APPLIANCE COMPONENTS RV; Cover Plate MFR # 290120
11. #GASKET, PILOT BURNER USE 71076 MFR # 70163 Superseded: see description
12. #APPLIANCE COMPONENTS RV; Electrode MFR # 230832
13. #WIRE ELECTRODE <NLA> MFR # 231001
14. #Screw; For Suburban Furnace NT-Series; Fits Suburban Furnace Combustion Chamber; #10 x 3/8 Inch MFR # 121252
15. #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
16. #SWITCH,LIMIT MFR # 232578
17. #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
18. #APPLIANCE COMPONENTS RV; Bushing MFR # 70362
19. #Furnace Power Supply Wiring Harness; For Suburban Furnace; With 3-Pin Female Connector MFR # 230789
20. #WATER FLANGE WHIT PLASTC MFR # 62135
21. #NORCO/BAL JACK MOTOR MFR # 231000
22. #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
23. #APPLIANCE COMPONENTS RV; Relay MFR # 230625
24. #APPLIANCE COMPONENTS RV; Screw 6 X 5/8 Ph Ph MFR # 121357
25. #APPLIANCE COMPONENTS RV; Screw #6X3/8 Ph Ph Blck Z MFR # 120198
26. #GATEKING-F150 (04-14) MFR # 230714
27. #RADIATION SHIELD ASSEMBLY (CHAMBER WRAPPER) MFR # 110422
28. #CHAMBER MFR # 20977

Exploded View › Blower Assembly

Components

37 items

1. #Screw; For Suburban Furnace NT-Series; Fits Suburban Furnace Combustion Chamber; #10 x 3/8 Inch MFR # 121252
2. #RING,INLET BLOWER MFR # 390027
3. #WHEEL ROOM AIR MFR # 350080
4. #APPLIANCE COMPONENTS RV; Hsg Blower MFR # 390328
5. #APPLIANCE COMPONENTS RV; Fastener Tinnerman MFR # 121661
6. #APPLIANCE COMPONENTS RV; Gskt Hsg Blower MFR # 70638
7. #Screw; Use With Suburban Furnace Model NT40; Phillips Head; 10-24 x 1/2 MFR # 121227 Superseded: see description
8. #Furnace Low Air Flow Switch; For Suburban Furnace NT-40; Also Use New Number 233355 MFR # 232279 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 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
11. #Furnace Low Air Flow Switch; For Suburban Furnace NT-40 MFR # 233355
12. #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
13. #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
14. #APPLIANCE COMPONENTS RV; #8 Screw MFR # 120158
15. #Nut; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; Fits Furnace Combustion Air Housing; Locking; #10-24 Thread Size MFR # 120717
16. #APPLIANCE COMPONENTS RV; Cov Comb Air MFR # 390205
17. #GSKT COV COMB AIR MFR # 70570
18. #Screw; For Suburban Furnace NT-12SE/ NT-16SE/ NT-20SE; 10 x 1/2; Serrated Head; Single MFR # 121388
19. #HOUSING, COMBUSTION AIR & MOTOR COVER ASSEMBLY MFR # 390329
20. #APPLIANCE COMPONENTS RV; Bushing MFR # 70362
21. #Furnace Gasket; Furnace Combustion Air Housing Gasket; Fits Suburban Furnace NT-25K/ NT-30K/ NT-35K MFR # 70406
22. #BUSHING, MOTOR MOUNTING (2 REQUIRED) MFR # 70571
23. #APPLIANCE COMPONENTS RV; CLAMP WIRE 3/8" NYLON MFR # 61663
24. #MOTOR USE 231646 MFR # 230772 Superseded: see description
25. #APPLIANCE COMPONENTS RV; Motor MFR # 231646
26. #BRACKET, MOTOR SUPPORT MFR # 62307
27. #APPLIANCE COMPONENTS RV; Wheel Blower Small 6-1/4 MFR # 350069
28. #Furnace Gasket; Furnace Motor Gasket; Fits Suburban Furnace NT20A/ NT20C/ NT20CD/ NT22C/ NT22CD/ NT30A/ NT30C/ NT30CD/ NT32C/ NT30CD/ NT45S MFR # 70165
29. #APPLIANCE COMPONENTS RV; Hsg Blower MFR # 390201
30. #WHEEL ROOM AIR MFR # 350079
31. #CHANNEL, RUBBER MFR # 70494
32. #BRACKET, MODULE BOARD MOUNTING ASSEMBLY MFR # 62433
33. #INSULATOR, MODULE BOARD MFR # 70539
34. #APPLIANCE COMPONENTS RV; Module Board MFR # 520612
35. #APPLIANCE COMPONENTS RV; Wire Mod Board MFR # 230935
36. #CAP LUG #1-3/8 RED INSULATOR CAP F/ CIR BD MFR # 70549
37. #Nut; For Suburban Furnace NT-45S MFR # 121271