Use these three exploded illustrations for the Suburban SF-20FQ furnace to locate the cabinet and duct fittings, burner components, and fan-control assemblies. The reference number beside each drawing corresponds to an original service part entry below.
Select a linked part number to view its details and availability. Match the furnace model and serial-number range before ordering.
1. Cabinet, thermostat and duct layout
| Reference | Manufacturer part number | Quantity | Component details |
|---|---|---|---|
| 1A | 102316 | 1 | CABINET FRONT ASSEMBLY 2-HOLE |
| 2 | 161154 | 1 | THERMOSTAT, WALL (WHITE) |
| 5 | 102327 | 1 | CABINET ASSEMBLY |
| 6 | 50733 | 1 | COVER, DUCT |
| 7 | 50715 | 1 | DUCT COLLAR, 4 IN. |
2. Burner, manifold and electrode references
| Reference | Manufacturer part number | Quantity | Component details |
|---|---|---|---|
| 9 | 171743 | 1 | MANIFOLD ASSY, COMPLETE |
| 11 | 180305 | 1 | ORIFICE #55 METRIC THREADS |
| 12 | 71263 | 1 | GASKET, BURNER ACCESS COVER |
| 12 | 525031 | 1 | SERVICE KIT, GASKET BURNER ACCESS COVER |
| 13 | 121704 | 1 | PLATE, TINNERMAN |
| 16 | 62933 | 1 | PLATE, SECONDARY AIR (FRONT) |
| 19 | 62935 | 1 | PLATE, SECONDARY AIR, BOTTOM |
| 22 | 232286 | 1 | ELECTRODE, SINGLE PROBE W/ WIRE (L SHAPE) - Above Serial No 934701426 Ending Serial No 171416095 |
| 22 | 525009 | 1 | SERVICE KIT, ELECTRODE W/GROMMET (L SHAPE) - Above Serial No 934701426 Ending Serial No 171416095 |
| 22 | 233222 | 1 | ELECTRODE, SINGLE PROBE WITH WIRE USE 233306 |
| 22 | 233306 | 1 | ELECTRODE & WIRE ASSY (STRAIGHT) - Above Serial No 171416095 |
| 22 | 525051 | 1 | SERVICE KIT ELECTRODE, STRAIGHT - Above Serial No 171416095 |
| 23 | 10767 | 1 | BURNER ASSEMBLY |
| 24 | 70963 | 1 | GROMMET |
| 26 | 161122 | 1 | GAS VALVE, 3/8 INLET NPT X 3/8 INVERTED OUTLET |
| NS | 521074 | 1 | SOLENOID KIT FOR WHITE RODGERS VALVES |
| NS | 521075 | 1 | SOLENOID KIT FOR SEVEN UNIVERSE VALVES |
| 27 | 171576 | 1 | PIPE ASSY, GAS INLET |
| 29 | 170374 | 1 | GAS FITTING, 90° ELBOW |
| 29 | 525025 | 1 | SERVICE KIT, FITTING BRASS 3/8 90 DEG ELBOW |
3. Vent, blower and ignition assemblies
| Reference | Manufacturer part number | Quantity | Component details |
|---|---|---|---|
| 31 | 260553 | 1 | VENT CAP AND EXHAUST TUBE ASSEMBLY |
| 32 | 51249 | 1 | VENT TUBE ASSEMBLY INTAKE |
| 34 | 390852 | 1 | COMBUSTION AIR HOUSING (FRONT) |
| 35 | 121929 | 1 | SCREW, #8 - 18 X 2 1/4 |
| 36 | 121928 | 1 | SCREW 6-19 X 1/2 PH PH |
| 37 | 390849 | 1 | COMBUSTION AIR HOUSING (REAR) |
| 38 | 350189 | 1 | WHEEL, COMBUSTION AIR USE 350211 |
| 38 | 350211 | 1 | COMBUSTION AIR WHEEL |
| 39 | 71084 | 1 | GASKET, FIREWALL COMBUSTION AIR |
| 40 | 233004 | 1 | MOTOR ASSEMBLY W/GASKET |
| 41 | 121945 | 2 | SCREW # 4-20 X 5/8 |
| 42 | 391039 | 1 | BLOWER ASSY, ROOM AIR, FRONT |
| 43 | 121857 | 4 | SCREW #8-18 X 1/2 |
| 44 | 391035 | 1 | BLOWER HOUSING, ROOM AIR, REAR |
| 45 | 232261 | 1 | SWITCH, SAIL USE 233382 |
| 45 | 233382 | 1 | SAIL SWITCH |
| 45 | 525003 | 1 | SERVICE KIT, SAIL SWITCH |
| 48 | 232351 | 1 | ON/OFF SWITCH |
| 49 | 63446 | 1 | BRACKET, ON/OFF SWITCH |
| 50 | 520820 | 1 | MODULE BOARD, WAS SUPERCEEDED USE 521099 |
| 50 | 521099 | 1 | IGNITION CONTROL MODULE |
| 51 | 70973 | 1 | INSULATOR CAP, MODULE BOARD COIL |
| 52 | 350206 | 1 | WHEEL, ROOM AIR |
| 54 | 70362 | 1 | BUSHING, SNAP |
| 56 | 71206 | 1 | BUSHING, STRAIN RELIEF |
| 57 | 71262 | 1 | GASKET, FIREWALL, CHAMBER SIDE |
| 58 | 21225BK | 1 | CHAMBER ASSEMBLY, FINAL |
| 59 | 232503 | 1 | SWITCH, LIMIT |
| 62 | 110792 | 1 | FIREWALL |
| 63 | 122001 | 4 | SCREW, #6-19 X 3/4 |
| 64 | 63610 | 1 | STOP, MODULE BOARD |
| 67 | 63616 | 1 | BRACKET HOUSING, ROOM & COMB AIR |
| NS | 2606A | 1 | FURNACE CORE REPLACEMENT RP-20FQ |
Photos of linked replacement parts
These images come from the linked NewRVParts product listings. Match the part number to the diagram and review model and serial-number details before ordering.
