Consult the NT20S furnace model illustrations for exterior housing, the combustion chamber and the blower and controls. Match each drawing callout with the manufacturer part number in the table before choosing a replacement.
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 | 120158 | 2 | SCREW, #8 X 3/8 |
| 4 | 100960 | 1 | FRONT, CABINET USE 101884 |
| 4 | 101884 | 1 | FRONT, CABINET |
| 5 | 100959 | 1 | WRAP, CABINET USE 101885 |
| 5 | 101885 | 1 | CABINET |
| 6 | 50715 | 2 | DUCT COLLAR, 4 IN. |
| 7 | 70569 | 1 | BUSHING SNAP |
| 8 | 50906 | 1 | SUBURBAN INTAKE TUBE 3 IN |
| 8 | 50712 | 1 | TUBE, INTAKE 5IN LONG (STANDARD) |
| 8 | 50708 | 1 | TUBE, INTAKE 7-1/4IN LONG |
| 9 | 260098 | 1 | CAP & EXHAUST TUBE ASSM USE 260572 |
| 9 | 260572 | 1 | VENT CAP & EXHAUST TUBE ASSEMBLY |
| 10 | 121853 | 6 | SCREW, #10 X 3/4 |
2. Switches, blower and combustion-air parts
| Reference | Manufacturer part number | Quantity | Component details |
|---|---|---|---|
| 11 | 62476 | 1 | BRACKET, MICRO SW MOUNTING |
| 11A | 121247 | 2 | SCREW, 2-56 X 5/8 HEX |
| 12 | 230933 | 1 | MICRO SWITCH USE 233100 |
| 12 | 233100 | 1 | MICRO SWITCH ASM USE 525028 |
| 12 | 233352 | 1 | MICRO SWITCH |
| 12 | 525028 | 1 | SERVICE KIT, SAIL SWITCH |
| 13 | 121951 | 2 | NUT #2-56 |
| 14 | 20890BK | 1 | COMBUSTION CHAMBER |
| 15 | 121388 | 1 | SCREW, #10 X 1/2 |
| 16 | 70362 | 1 | BUSHING, SNAP |
| 17 | 121927 | 1 | SCREW 8 X 1/4 PH.P.H. (NO SUBSTITUTE) |
| 18 | 230621 | 1 | LIMIT SWITCH 180 DEGREE - Below Serial# 093800203 |
| 18 | 233022 | 1 | LIMIT SWITCH 170 DEGREE - Above Serial# 093800203 |
| 19 | 120158 | 2 | SCREW, #8 X 3/8 |
| 20 | 121244 | 2 | SCREW, #6 X 1/4IN |
| 21 | 230714 | 1 | SPLICER |
| 22 | 120158 | 1 | SCREW, #8 X 3/8 |
| 22A | 120158 | 2 | SCREW, #8 X 3/8 |
| 23 | 70270 | 1 | BUSHING, SNAP 1/2 IN. |
| 24 | 121388 | 1 | SCREW, #10 X 1/2 |
| 26 | 231741 | 1 | MODULE BOARD, WAS SUPERCEEDED BY 520741. USE 521099 |
| 26 | 520741 | 1 | MODULE BOARD, WAS SUPERCEEDED BY 520820. USE 521099 |
| 26 | 520820 | 1 | MODULE BOARD, WAS SUPERCEEDED USE 521099 |
| 26 | 521099 | 1 | IGNITION CONTROL MODULE |
| 27 | 121271 | 2 | NUT, #6 32 HEX |
| 29 | 62392 | 1 | BRACKET, COMBUSTION AIR HOUSING MOUNTING |
| 31 | 70450 | 1 | GASKET, BURNER TUNNEL |
| 32 | 120717 | 2 | NUT, HEX # 10-24 KEPS |
| 33 | 120158 | 2 | SCREW, #8 X 3/8 |
| 34 | 71161 | 1 | GASKET, COMBUSTION AIR BOX USE 70446 |
| 34 | 70446 | 1 | GASKET COMBUSTION AIR BOX |
| 35 | 120158 | 2 | SCREW, #8 X 3/8 |
| 36 | 390876 | 1 | HOUSING, COMBUSTION AIR (REAR) |
| 37 | 120158 | 9 | SCREW, #8 X 3/8 |
| 38 | 350082 | 1 | WHEEL, COMBUSTION AIR |
| 39 | 121329 | 2 | NUT, 10-32 HEX LOCK |
| 40 | 120722 | 2 | WASHER - FLAT |
| 41 | 390874 | 1 | HOUSING, COMBUSTION AIR (FRONT) |
| 42 | 121928 | 8 | SCREW 6-19 X 1/2 PH PH |
| 43 | 71085 | 1 | MOTOR GASKET |
| 44 | 230634 | 1 | MOTOR USE 232878 |
| 44 | 232878 | 1 | MOTOR USE 520950 |
| 44 | 520950 | 1 | MOTOR KIT W/ GASKETS - NLA |
| 45 | 350083 | 1 | IMPELLER ROOM AIR |
| 46 | 63447 | 1 | BRACKET, COMBUSTION AIR HOUSING MOUNTING |
| NS | 2611A | 1 | FURNACE CORE REPLACEMENT RP-16NQ |
3. Burner, gas valve and ignition components
| Reference | Manufacturer part number | Quantity | Component details |
|---|---|---|---|
| 48 | 121407 | 2 | SCREW 8-32 X 3/8 HEX BK |
| 49 | 231931 | 1 | ELECTRODE (SINGLE PROBE) |
| 49 | 525033 | 1 | SERVICE KIT, ELECTRODE |
| 50 | 70163 | 1 | GASKET, ELECTRODE USE 071076 |
| 50 | 71076 | 1 | BURNER/ELECTRODE GASKET SET USE 72103 |
| 50 | 72103 | 1 | GASKET KIT, BURNER /ELECTRODE |
| 50 | 525011 | 1 | SERVICE KIT, GASKETS BURNER / ELECTRODE |
| 51 | 121388 | 4 | SCREW, #10 X 1/2 |
| 52 | 120717 | 2 | NUT, HEX # 10-24 KEPS |
| 53 | 120158 | 1 | SCREW, #8 X 3/8 |
| 54 | 30621 | 1 | BURNER ACCESS DOOR |
| 55 | 70398 | 1 | GASKET, BURNER ACCESS DOOR USE 071076 |
| 55 | 71076 | 1 | BURNER/ELECTRODE GASKET SET USE 72103 |
| 55 | 72103 | 1 | GASKET KIT, BURNER /ELECTRODE |
| 55 | 525011 | 1 | SERVICE KIT, GASKETS BURNER / ELECTRODE |
| 56 | 63262 | 1 | BRACKET, SWITCH MOUNTING |
| 57 | 232351 | 1 | ON/OFF SWITCH |
| 58 | 171428 | 1 | ELBOW 90 |
| 59 | 170374 | 1 | GAS FITTING, 90° ELBOW |
| 59 | 525025 | 1 | SERVICE KIT, FITTING BRASS 3/8 90 DEG ELBOW |
| 60 | 121388 | 1 | SCREW, #10 X 1/2 |
| 61 | 71034 | 1 | GASKET, GAS INLET |
| 62 | 62143 | 1 | PLATE COVER, GAS INLET |
| 63 | 170758 | 1 | PIPE, GAS INLET |
| 64 | 161123 | 1 | GAS VALVE 3/8 X 1/8 |
| 67 | 170746 | 1 | MANIFOLD ASSY |
| 68 | 120615 | 4 | SCREW 8 X 1/2 PH PH |
| 69 | 180231 | 1 | ORIFICE, MAIN BURNER |
| 70 | 70449 | 1 | GASKET, MANIFOLD PIPE |
| 71 | 10614 | 1 | BURNER ASSEMBLY USE 10978 |
| 71 | 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 9 · MPN 260572
Suburban 260572 Furnace Vent with Rain Shield, Exhaust Tube with Cap
View product and availability
Ref 26 · MPN 521099
Suburban 521099 12V Furnace Fan-Control Ignition Module
View product and availability
Ref 52 · MPN 120717
Suburban 120717 #10-24 Plastic Hex Replacement Nut
View product and availability
Ref 49 · MPN 525033
Suburban 525033 NT-Series Furnace Single-Probe Igniter
View product and availability
Ref 55 · MPN 525011
Suburban 525011 Furnace Burner & Electrode Gasket Kit | NT/P
View product and availability
Ref 57 · MPN 232351
Suburban 232351 Furnace On/Off Switch | Select SF, SH & NT
View product and availability
Ref 64 · MPN 161123
Suburban 161123 12V Gas Valve | Selected NT/VT Furnaces
View product and availability