The NT30K service reference starts with the cabinet and ventilation hardware, continues into the ignition components and gas assembly, and ends at the blower and motor. The four images correspond to the numbered parts below them.
Select a linked manufacturer number for product details and availability. Check the furnace model, serial-number range and any replacement notes before ordering.
1. Cabinet, ducts and wiring
| Reference | Manufacturer part number | Quantity | Component description |
|---|---|---|---|
| 1 | 101082 | 1 | FRONT, CABINET |
| 2 | 260156 | 1 | CAP AND EXHAUST TUBE ASSM |
| 3 | 260157 | 1 | CAP AND EXHAUST TUBE ASSM |
| 4 | 50869 | 1 | AIR INTAKE TUBE ASSY |
| 5 | 50715 | 1 | DUCT COLLAR, 4 IN. |
| 6 | 50733 | 1 | COVER, DUCT |
| 7 | 121224 | 1 | SCREW, #10 X 3/4 |
| 8 | 120158 | 1 | SCREW, #8 X 3/8 |
| 9 | 70472 | 1 | BUSHING |
| 10 | 121224 | 1 | SCREW, #10 X 3/4 |
| 11 | 161154 | 1 | THERMOSTAT, WALL (WHITE) |
| 12 | 101087 | 1 | CABINET ASSY, NT-35K |
2. Electrodes, chamber and exhaust
| Reference | Manufacturer part number | Quantity | Component description |
|---|---|---|---|
| 13 | 121388 | 1 | SCREW, #10 X 1/2 |
| 14 | 120158 | 1 | SCREW, #8 X 3/8 |
| 15 | 231168 | 1 | ELECTRODE |
| NS | 231261 | 1 | ELECTRODE WIRE |
| 16 | 290117 | 1 | COVER, OBSERVATION HOLE |
| 17 | 70367 | 1 | GASKET, OBSERVATION HOLE |
| 18 | 71076 | 1 | BURNER/ELECTRODE GASKET SET USE 72103 |
| 18 | 72103 | 1 | GASKET KIT, BURNER /ELECTRODE |
| 18 | 525011 | 1 | SERVICE KIT, GASKETS BURNER / ELECTRODE |
| 19 | 120158 | 1 | SCREW, #8 X 3/8 |
| 20 | 70362 | 1 | BUSHING, SNAP |
| 21 | 121252 | 1 | SCREW 10 X 3/8 PH PH |
| 22 | 231204 | 1 | LIMIT SWITCH |
| 23 | 120158 | 1 | SCREW, #8 X 3/8 |
| 24 | 121502 | 1 | SCREW 6X3/8 PH RH BLACK |
| 25 | 230625 | 1 | TIME DELAY RELAY |
| 26 | 121244 | 1 | SCREW, #6 X 1/4IN |
| 27 | 230714 | 1 | SPLICER |
| 28 | 120158 | 1 | SCREW, #8 X 3/8 |
| 29 | 121388 | 1 | SCREW, #10 X 1/2 |
| 30 | 90320 | 1 | COVER, BURNER ACCESS |
| 31 | 121378 | 1 | TINNERMAN U TYPE |
| 32 | 101081 | 1 | PANEL, MODULE BOARD MNTG. |
| 33 | 70807 | 1 | INSULATOR, MODULE BOARD |
| 34 | 520741 | 1 | MODULE BOARD, WAS SUPERCEEDED BY 520820. USE 521099 |
| 34 | 520820 | 1 | MODULE BOARD, WAS SUPERCEEDED USE 521099 |
| 34 | 521099 | 1 | IGNITION CONTROL MODULE |
| 35 | 70549 | 1 | INSULATOR CAP |
| 36 | 121357 | 1 | SCREW 6 X 5/8 PH PH |
| 37 | 121336 | 1 | TINNERMAN 1/8 PUSH ON |
| 38 | 120158 | 1 | SCREW, #8 X 3/8 |
| 39 | 120158 | 1 | SCREW, #8 X 3/8 |
| 40 | 40341 | 1 | BAFFLE, BURNER AIR |
| 41 | 110529 | 1 | FIREWALL ASSY |
| 42 | 20988 | 1 | COMBUSTION CHAMBER |
3. Gas system and burner
| Reference | Manufacturer part number | Quantity | Component description |
|---|---|---|---|
| 43 | 70698 | 1 | GASKET, MANIFOLD |
| 44 | 180193 | 1 | ORIFICE, MAIN BURNER |
| 45 | 170961 | 1 | MANIFOLD PIPE ASSY |
| 46 | 120158 | 1 | SCREW, #8 X 3/8 |
| 47 | 161123 | 1 | GAS VALVE 3/8 X 1/8 |
| 48 | 121407 | 1 | SCREW 8-32 X 3/8 HEX BK |
| 49 | 62711 | 1 | BRACKET, VALVE MOUNTING |
| 50 | 121595 | 1 | TINNERMAN U-CLIP |
| 51 | 160740 | 1 | VALVE, SHUTOFF |
| 52 | 120717 | 1 | NUT, HEX # 10-24 KEPS |
| 53 | 10693 | 1 | BURNER ASSEMBLY |
4. Blower, motor and air intake
| Reference | Manufacturer part number | Quantity | Component description |
|---|---|---|---|
| 54 | 120158 | 1 | SCREW, #8 X 3/8 |
| 55 | 350105 | 1 | WHEEL ROOM AIR NT-25/30/35 K |
| 56 | 350118 | 1 | WHEEL, COMBUSTION AIR |
| 57 | 231166 | 1 | MOTOR, 12V DC |
| 58 | 70406 | 1 | GASKET, COMB. AIR HOUSING |
| 59 | 390376 | 1 | COMBUSTION AIR HOUSING |
| 60 | 70706 | 1 | GASKET, MOTOR |
| 61 | 120158 | 1 | SCREW, #8 X 3/8 |
| 62 | 70704 | 1 | GASKET, CROSSOVER TUBE |
| 63 | 120158 | 1 | SCREW, #8 X 3/8 |
| 64 | 50825 | 1 | CROSSOVER TUBE ASSY |
| 65 | 70705 | 1 | GASKET |
| 66 | 120158 | 1 | SCREW, #8 X 3/8 |
| 67 | 70362 | 1 | BUSHING, SNAP |
| 68 | 120716 | 1 | NUT 10-32 HEX LOCK |
| 69 | 390371 | 1 | BLOWER HOUSING ASSY |
| 70 | 120158 | 1 | SCREW, #8 X 3/8 |
| 71 | 121661 | 1 | FASTENER TINNERMAN #2-56 |
| 73 | 230509 | 1 | MICRO SWITCH & PADDLE USE 233356 |
| 73 | 233356 | 1 | MICRO SWITCH & PADDLE |
| 73 | 525024 | 1 | SERVICE KIT, SAIL SWITCH |
| 73 | 525024 | 1 | SERVICE KIT, SAIL SWITCH |
| 74 | 121247 | 1 | SCREW, 2-56 X 5/8 HEX |
| 75 | 390365 | 1 | HOUSING, COMBUSTION AIR |
Replacement parts shown in the diagrams
The products pictured below have manufacturer numbers linked in the reference tables above. Confirm the furnace model, serial number and production revision before ordering. See individual listings for current availability.
Diagram ref 11 · MPN 161154
Suburban 161154 White Heat-Only Mechanical RV Furnace Thermostat
View product and availability
Diagram ref NS · MPN 231261
Suburban 231261 22-Inch Electrode Wire for NT/P Furnaces
View product and availability
Diagram ref 18 · MPN 525011
Suburban 525011 Furnace Burner & Electrode Gasket Kit | NT/P
View product and availability
Diagram ref 34 · MPN 521099
Suburban 521099 12V Furnace Fan-Control Ignition Module
View product and availability
Diagram ref 47 · MPN 161123
Suburban 161123 12V Gas Valve | Selected NT/VT Furnaces
View product and availability
Diagram ref 52 · MPN 120717
Suburban 120717 #10-24 Plastic Hex Replacement Nut
View product and availability
Diagram ref 73 · MPN 525024
Suburban 525024 Furnace Sail Switch | Select NT, SF & P-30S
View product and availability