Suburban DD12P Pilot Furnace Parts Drawing and Service List
The Suburban DD12P uses pilot ignition. Its original illustration and parts references cover the thermostat and wiring, combustion-air motor and venting, pilot burner and gas train, and the cabinet and grille. The pilot-specific components must not be confused with DD17DSI electronic-ignition parts.
Use the drawing positions and Suburban part numbers below to identify each component. Check the furnace model, fuel type and serial number before choosing a replacement.
1. Thermostat and electrical control references
Illustration 1 — Thermostat and electrical control references. Match the drawing callout to the manufacturer number below.
Drawing reference
Manufacturer part number
Quantity
Component description
0
231760
1
FUSE HOLDER - *** Not shown
0
232351
1
ON/OFF SWITCH - *** Not shown Aft SN 951102950
0
520577
1
PIEZO IGNITOR KIT - *** Not shown
1
161154
1
THERMOSTAT, WALL (WHITE)
24
231769
1
RELAY, TIME DELAY
29
231770
1
TERMINAL STRIP
30
90352
1
CONTROL BOX
39
230709
1
THERMAL FUSE LINK
55
231768
1
LIMIT SWITCH 260 DEGREE
2. Combustion-air drive, motor and venting
Drawing reference
Manufacturer part number
Quantity
Component description
2
121717
2
SCREW
3
62945
1
BRACE, COMBUSTION AIR HOUSING
4
70849
1
GASKET, MOTOR
5
51074
1
CUP, INTAKE AIR
6
390536
1
HOUSING, COMBUSTION AIR (FRONT)
7
70862
1
GASKET, COMBUSTION AIR HOUSING (FRONT)
8
230877
1
GASKET, MICRO SWTICH
9
231759
1
SWITCH, MICRO - Below SN 912000061
9
231930
1
MICROSWITCH - Above SN 912000061
10
121451
1
SCREW
11
390540
1
COMBUSTION AIR PANEL ASSY
12
390535
1
COMBUSTION AIR HOUSING REAR
13
260197
1
VENT ASSY 2 - 4 IN.
13
260198
1
VENT ASSY 4 - 6 IN.
13
260199
1
VENT ASSY 6 - 9 IN.
14
121717
1
SCREW
15
121715
1
SCREW
16
350126
1
WHEEL, COMBUSTION AIR
17
70860
1
GASKET, COMBUSTION AIR HOUSING, REAR
37
231916
1
MOTOR(231916)
38
350125
1
IMPELLER, ROOM AIR
3. Pilot burner, LP valve and gas manifold
Drawing reference
Manufacturer part number
Quantity
Component description
18
70859
1
GASKET, BURNER TUNNEL
19
51075
1
BURNER TUNNER
20
10763
1
BURNER ASSY
21
70847
1
GASKET, MANIFOLD
22
121717
1
SCREW
23
171110
1
MANIFOLD
25
121717
1
SCREW
26
171108
1
TUBE, PILOT
27
170440
1
1/4 IN. LOXIT NUT
28
62943
1
BRACKET, MANIFOLD
31
121719
1
SCREW
32
121717
1
SCREW
33
121714
1
SCREW
34
180258
1
ORRIFICE
35
70848
1
GASKET, BURNER TUNNEL (CHAMBER END)
42
170374
1
GAS FITTING, 90° ELBOW
42
525025
1
SERVICE KIT, FITTING BRASS 3/8 90 DEG ELBOW
42
525025
1
SERVICE KIT, FITTING BRASS 3/8 90 DEG ELBOW
44
160949
1
VALVE
46
70851
1
GASKET, PILOT BURNER
47
160955
1
PILOT BURNER W/ ELECTRODE
48
121694
1
NUT #8-32 KEPS
60
231765
1
THERMOCOUPLE
4. Cabinet, grille, access door and chamber
Drawing reference
Manufacturer part number
Quantity
Component description
36
101329
1
CABINET BACK
40
70856
1
BUSHING
41
121717
1
SCREW
43
70854
1
BUSHING, OPEN/CLOSE
45
62942
1
BARACKET, CABINET TIE-DOWN
49
30769
1
GRILLE ASSY
50
30767
1
DOOR, BURNER ACCESS
51
70850
1
GASKET, BURNER ACCESS DOOR
52
121474
1
NUT, 1/4 HEX
53
62944
1
BRACKET, LIMIT SWITCH
54
21049
1
COMBUSTION CHAMBER ASSY - Incl: #5
56
121502
1
SCREW 6X3/8 PH RH BLACK
57
101328
1
CABINET WRAP
58
230798
1
ADAPTER, SPLIT MOUNT
59
231798
1
MAG ADAPTER ASSY
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