The NT20SE diagrams cover the cabinet and vent, switch and blower assembly, and burner and gas components. Match numbered callouts to the original manufacturer part number in each section.
Links appear only where the manufacturer number matches a current NewRVParts listing without a conflicting model. Parts without a confirmed match remain as plain-text references.
1. Cabinet, intake and exhaust fittings
| Reference | Manufacturer part number | Quantity | Component details |
|---|---|---|---|
| 1 | 161154 | 1 | THERMOSTAT, WALL (WHITE) |
| 1 | 161210 | 1 | THERMOSTAT, WALL (BLACK) |
| 2 | 121224 | 2 | SCREW, #10 X 3/4 |
| 3 | 121520 | 2 | SCREW, #8 X 3/8 PHPH BK OXIDE |
| 4 | 30520 | 1 | FRONT, CABINET USE 30785 |
| 4 | 30785 | 1 | FRONT, CABINET |
| 5 | 101887 | 1 | CABINET |
| 6 | 70569 | 1 | BUSHING SNAP |
| 7 | 50711 | 1 | TUBE, INTAKE 2-3/4IN LONG |
| 7 | 50712 | 1 | TUBE, INTAKE 5IN LONG (STANDARD) |
| 7 | 50708 | 1 | TUBE, INTAKE 7-1/4IN LONG |
| 8 | 260098 | 1 | CAP & EXHAUST TUBE ASSM USE 260572 |
| 8 | 260572 | 1 | VENT CAP & EXHAUST TUBE ASSEMBLY |
| 9 | 121853 | 6 | SCREW, #10 X 3/4 |
2. Switches, blower and combustion-air parts
| Reference | Manufacturer part number | Quantity | Component details |
|---|---|---|---|
| 10 | 62476 | 1 | BRACKET, MICRO SW MOUNTING |
| 10A | 121247 | 2 | SCREW, 2-56 X 5/8 HEX |
| 11 | 230933 | 1 | MICRO SWITCH USE 233100 |
| 11 | 233100 | 1 | MICRO SWITCH ASM USE 525028 |
| 11 | 233352 | 1 | MICRO SWITCH |
| 11 | 525028 | 1 | SERVICE KIT, SAIL SWITCH |
| 11A | 121951 | 2 | NUT #2-56 |
| 12 | 20884BK | 1 | COMBUSTION CHAMBER/ SHIELD ASSEMBLY |
| 13 | 121388 | 2 | SCREW, #10 X 1/2 |
| 14 | 120158 | 2 | SCREW, #8 X 3/8 |
| 15 | 70243 | 1 | GROMMET |
| 17 | 230849 | 1 | LIMIT SWITCH |
| 17 | 233020 | 1 | LIMIT SWITCH USE 233484 - Above Serial# 094000057 |
| 17 | 233484 | 1 | LIMIT SWITCH |
| 18 | 120158 | 2 | SCREW, #8 X 3/8 |
| 19 | 120714 | 2 | SCREW, #6 X 1/4 |
| 20 | 230714 | 1 | SPLICER |
| 21 | 120158 | 2 | SCREW, #8 X 3/8 |
| 21A | 120158 | 2 | SCREW, #8 X 3/8 |
| 22 | 70270 | 1 | BUSHING, SNAP 1/2 IN. |
| 23 | 121357 | 1 | SCREW 6 X 5/8 PH PH |
| 24 | 520741 | 1 | MODULE BOARD, WAS SUPERCEEDED BY 520820. USE 521099 |
| 24 | 520820 | 1 | MODULE BOARD, WAS SUPERCEEDED USE 521099 |
| 24 | 521099 | 1 | IGNITION CONTROL MODULE |
| 27 | 62392 | 1 | BRACKET, COMBUSTION AIR HOUSING MOUNTING |
| 28 | 120158 | 2 | SCREW, #8 X 3/8 |
| 29 | 70450 | 1 | GASKET, BURNER TUNNEL |
| 30 | 120717 | 2 | NUT, HEX # 10-24 KEPS |
| 31 | 120158 | 2 | SCREW, #8 X 3/8 |
| 32 | 350082 | 1 | WHEEL, COMBUSTION AIR |
| 33 | 120158 | 9 | SCREW, #8 X 3/8 |
| 34 | 390876 | 1 | HOUSING, COMBUSTION AIR (REAR) |
| 35 | 121329 | 2 | NUT, 10-32 HEX LOCK |
| 36 | 71161 | 1 | GASKET, COMBUSTION AIR BOX USE 70446 |
| 36 | 70446 | 1 | GASKET COMBUSTION AIR BOX |
| 37 | 120722 | 2 | WASHER - FLAT |
| 38 | 390874 | 1 | HOUSING, COMBUSTION AIR (FRONT) |
| 39 | 121928 | 8 | SCREW 6-19 X 1/2 PH PH |
| 40 | 71085 | 1 | MOTOR GASKET |
| 41 | 230634 | 1 | MOTOR USE 232878 |
| 41 | 232878 | 1 | MOTOR USE 520950 |
| 41 | 520950 | 1 | MOTOR KIT W/ GASKETS - NLA |
| 42 | 350083 | 1 | IMPELLER ROOM AIR |
| 43 | 63447 | 1 | BRACKET, COMBUSTION AIR HOUSING MOUNTING |
| 63 | 63249 | 1 | BRACKET, SWITCH MOUNITNG |
| 64 | 232351 | 1 | ON/OFF SWITCH |
| 65 | 120158 | 1 | SCREW, #8 X 3/8 |
3. Burner, gas valve and ignition components
| Reference | Manufacturer part number | Quantity | Component details |
|---|---|---|---|
| 44 | 121407 | 2 | SCREW 8-32 X 3/8 HEX BK |
| 45 | 231931 | 1 | ELECTRODE (SINGLE PROBE) |
| 45 | 525033 | 1 | SERVICE KIT, ELECTRODE |
| NS | 231261 | 1 | ELECTRODE WIRE |
| 46 | 70163 | 1 | GASKET, ELECTRODE USE 071076 |
| 46 | 71076 | 1 | BURNER/ELECTRODE GASKET SET USE 72103 |
| 46 | 72103 | 1 | GASKET KIT, BURNER /ELECTRODE |
| 46 | 525011 | 1 | SERVICE KIT, GASKETS BURNER / ELECTRODE |
| 47 | 121388 | 4 | SCREW, #10 X 1/2 |
| 48 | 120717 | 2 | NUT, HEX # 10-24 KEPS |
| 50 | 30621 | 1 | BURNER ACCESS DOOR |
| 51 | 70398 | 1 | GASKET, BURNER ACCESS DOOR USE 071076 |
| 51 | 71076 | 1 | BURNER/ELECTRODE GASKET SET USE 72103 |
| 51 | 72103 | 1 | GASKET KIT, BURNER /ELECTRODE |
| 51 | 525011 | 1 | SERVICE KIT, GASKETS BURNER / ELECTRODE |
| 54 | 170374 | 1 | GAS FITTING, 90° ELBOW |
| 54 | 525025 | 1 | SERVICE KIT, FITTING BRASS 3/8 90 DEG ELBOW |
| 55 | 161123 | 1 | GAS VALVE 3/8 X 1/8 |
| 56 | 62288 | 1 | BRACKET, MANIFOLD MOUNTING |
| 57 | 120158 | 2 | SCREW, #8 X 3/8 |
| 58 | 170744 | 1 | MANIFOLD |
| 59 | 120615 | 4 | SCREW 8 X 1/2 PH PH |
| 60 | 180231 | 1 | ORIFICE, MAIN BURNER |
| 61 | 70449 | 1 | GASKET, MANIFOLD PIPE |
| 62 | 10614 | 1 | BURNER ASSEMBLY USE 10978 |
| 62 | 10978 | 1 | BURNER ASM. W/ACCESS DOOR |
Replacement parts shown in the diagrams
These products have matching manufacturer part numbers in the reference tables above. Confirm the furnace model, serial range and product details before ordering; check each listing for current availability.
Ref 1 · MPN 161154
Suburban 161154 White Heat-Only Mechanical RV Furnace Thermostat
View product and availability
Ref 1 · MPN 161210
Suburban 161210 Black Heat-Only Mechanical RV Furnace Thermostat
View product and availability
Ref 8 · MPN 260572
Suburban 260572 Furnace Vent with Rain Shield, Exhaust Tube with Cap
View product and availability
Ref 17 · MPN 230849
Suburban 230849 Furnace Limit Switch, Replacement for NT-20SE Model, OEM
View product and availability
Ref 24 · MPN 521099
Suburban 521099 12V Furnace Fan-Control Ignition Module
View product and availability
Ref 48 · MPN 120717
Suburban 120717 #10-24 Plastic Hex Replacement Nut
View product and availability
Ref 64 · MPN 232351
Suburban 232351 Furnace On/Off Switch | Select SF, SH & NT
View product and availability
Ref 45 · MPN 525033
Suburban 525033 NT-Series Furnace Single-Probe Igniter
View product and availability
Ref NS · MPN 231261
Suburban 231261 22-Inch Electrode Wire for NT/P Furnaces
View product and availability
Ref 51 · MPN 525011
Suburban 525011 Furnace Burner & Electrode Gasket Kit | NT/P
View product and availability
Ref 55 · MPN 161123
Suburban 161123 12V Gas Valve | Selected NT/VT Furnaces
View product and availability