Suburban NT34S Furnace Parts Diagrams and Service Guide

Use the four NT34S illustrations to separate the housing and ductwork from electrode, combustion, gas and blower components. Tables retain both the original manufacturer numbers and source notes about revised service parts.

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

Suburban NT34S cabinet and ducts service parts exploded view 1
View 1 of four — use the callout numbers to identify parts in the following list.
Reference Manufacturer part number Quantity Component description
1 100962 1 CABINET ASSY USE 101874
1 101874 1 CABINET ASM COMPLETE
2 121378 1 TINNERMAN U TYPE
3 62164 1 BOTTOM DUCT GASKET
4 121388 1 SCREW, #10 X 1/2
5 100808 1 CABINET FRONT
5A 121224 2 SCREW, #10 X 3/4
6 50715 4 DUCT COLLAR, 4 IN.
7 160849 1 THERMOSTAT USE 161154
7 161154 1 THERMOSTAT, WALL (WHITE)
8 520322 1 POWER SUPPLY HARNESS

2. Electrodes, chamber and exhaust

Suburban NT34S ignition and combustion chamber service parts exploded view 2
View 2 of four — use the callout numbers to identify parts in the following list.
Reference Manufacturer part number Quantity Component description
9 121407 2 SCREW 8-32 X 3/8 HEX BK
10 230956 1 ELECTRODE 3 PRONG - Below Serial# 920500001
10 525019 1 SERVICE KIT, ELECTRODE - Below Serial# 920500001
10 231933 1 ELECTRODE - Above Serial# 920500001
10 525029 1 SERVICE KIT, ELECTRODE - Above Serial# 920500001
NS 231261 1 ELECTRODE WIRE
11 121421 2 NUT, 10-24 HEX(THREAD LOCKING)
12 30523 1 ACCESS DOOR
13 70163 1 GASKET, ELECTRODE USE 071076
13 71076 1 BURNER/ELECTRODE GASKET SET USE 72103
13 72103 1 GASKET KIT, BURNER /ELECTRODE
13 525011 1 SERVICE KIT, GASKETS BURNER / ELECTRODE
14 120158 2 SCREW, #8 X 3/8
15 121388 4 SCREW, #10 X 1/2
16 310026 1 DISC, OBSERVATION GLASS
17 290120 1 OBSERVATION HOLE COVER
18 70398 1 GASKET, BURNER ACCESS DOOR USE 071076
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 20925 1 COMBUSTION CHAMBER
20 120158 2 SCREW, #8 X 3/8
21 230496 1 LIMIT SWITCH 230 DEGREE
22 121252 1 SCREW 10 X 3/8 PH PH
23 121252 1 SCREW 10 X 3/8 PH PH
24 70362 1 BUSHING, SNAP
25 121252 2 SCREW 10 X 3/8 PH PH
26 60270 1 WIRE CLAMP
27 230714 1 SPLICER
28 120714 2 SCREW, #6 X 1/4
29 120158 1 SCREW, #8 X 3/8
30 70270 1 BUSHING, SNAP 1/2 IN.
31 62135 1 BRACKET, POWER SUPPLY
32 120158 2 SCREW, #8 X 3/8
33 60270 1 WIRE CLAMP
34 120158 1 SCREW, #8 X 3/8
35 230587 1 MODULE BOARD USE 520741
35 520741 1 MODULE BOARD, WAS SUPERCEEDED BY 520820. USE 521099
35 520820 1 MODULE BOARD, WAS SUPERCEEDED USE 521099
35 521099 1 IGNITION CONTROL MODULE
36 121357 2 SCREW 6 X 5/8 PH PH
37 70549 1 INSULATOR CAP
38 70538 1 INSULATOR, MODULE BOARD
40 231202 1 TIME DELAY RELAY USE 521069
40 521069 1 TIME DELAY RELAY
41 121357 2 SCREW 6 X 5/8 PH PH
42 260164 1 VENT CAP, EXHAUST TUBE ASSY
43 50906 1 SUBURBAN INTAKE TUBE 3 IN
44 110504 1 RADIATION SHIELD ASSEMBLY
45 121224 4 SCREW, #10 X 3/4
46 121256 1 SCREW #8 X 3 1/4
46 121711 1 SCREW #8X3.25 PH PH 410SS
NS 230575 1 FAN SWITCH - Below Serial# 1600851

3. Gas system and burner

Suburban NT34S gas valve and burner service parts exploded view 3
View 3 of four — use the callout numbers to identify parts in the following list.
Reference Manufacturer part number Quantity Component description
22 121252 1 SCREW 10 X 3/8 PH PH
48 10619 1 BURNER
49 180222 1 ORIFICE #51
50 70408 1 GASKET, MANIFOLD PIPE
51 121388 4 SCREW, #10 X 1/2
52 170757 1 MANIFOLD ASM
53 160832 1 VALVE USE 161078
53 161078 1 VALVE USE 161123
53 161123 1 GAS VALVE 3/8 X 1/8
54 170858 1 PIPE GAS INLET
56 70432 1 GASKET, GAS INLET
57 170082 1 ELBOW 90 DEG X 3/8 NPT
58 70534 1 GASKET DISC COVER
59 62408 1 DISC COVER, GAS INLET
60 160740 1 VALVE, SHUTOFF

4. Blower, motor and air intake

Suburban NT34S motor and blower service parts exploded view 4
View 4 of four — use the callout numbers to identify parts in the following list.
Reference Manufacturer part number Quantity Component description
61 350076 1 WHEEL, ROOM AIR USE 350113
61 350113 1 WHEEL, ROOM AIR
62 121252 4 SCREW 10 X 3/8 PH PH
63 390283 1 HOUSING, BLOWER
64 121227 3 SCREW,10-24 X 1/2
65 230509 1 MICRO SWITCH & PADDLE USE 233356
65 233356 1 MICRO SWITCH & PADDLE
65 525024 1 SERVICE KIT, SAIL SWITCH
66 121247 2 SCREW, 2-56 X 5/8 HEX
67 121364 2 WASHER, LOCK #2
68 120672 2 NUT, HEX #2 -56
69 121388 3 SCREW, #10 X 1/2
70 62138 3 BRACKET MOTOR MOUNTING
71 120717 3 NUT, HEX # 10-24 KEPS
72 70385 2 GASKET CROSSOVER TUBE
73 50751 1 TUBE, CROSSOVER
74 121388 2 SCREW, #10 X 1/2
75 231208 1 MOTOR ASSY USE 521138
75 521138 1 MOTOR NT34 M,S,SP NT40
76 70384 1 GASKET, MOTOR MOUNT
77 390179 1 HOUSING COMBUSTION AIR ASSY
78 121436 2 SCREW #10-16 X 1/2
79 350069 1 WHEEL, COMBUSTION AIR USE 350110
79 350110 1 WHEEL COMBUSTION AIR
80 121436 3 SCREW #10-16 X 1/2
81 70386 1 GASKET, COMBUSTION AIR
82 390240 1 HOUSING, CUMBUSTION AIR OUTSIDE USE 390424
82 390424 1 HOUSING, COMBUSTION AIR (OUTSIDE)
83 121252 9 SCREW 10 X 3/8 PH PH

Save on Parts & Accessories

Sign up for special offers, new product updates, and deals on RV, truck camper, towing, truck, and marine parts and accessories.

About NewRVParts

NewRVParts is an online-only source for brand-new RV parts and accessories, truck camper equipment, towing and trailer parts, truck accessories, and marine products. We serve customers throughout Canada and the United States, with products from trusted manufacturers shipped through a large North American distribution network. Shop online for replacement parts, equipment, and accessories delivered directly to your door.

Shop RV Parts