Find SF-42Q parts in three numbered drawing groups for cabinet, gas and air-moving assemblies. Each table retains the source callout positions and factory part numbers.
Select a linked manufacturer part number to view product details and availability. Check the furnace model and any serial-number restrictions before ordering.
See parts referenced in this guide
These photos are from the linked NewRVParts listings. Compare the part number and installed component before ordering.
1. Cabinet and duct fittings
| Reference | Manufacturer part number | Quantity | Component description |
|---|---|---|---|
| 1 | 101242 | 1 | CABINET, FRONT, 3 - HOLE |
| 2 | 161154 | 1 | THERMOSTAT, WALL (WHITE) |
| 5 | 102359 | 1 | CABINET ASSEMBLY |
| 6 | 50733 | 1 | COVER, DUCT |
| 7 | 50715 | 1 | DUCT COLLAR, 4 IN. |
2. Burner, manifold and gas valve
| Reference | Manufacturer part number | Quantity | Component description |
|---|---|---|---|
| 9 | 171743 | 1 | MANIFOLD ASSY, COMPLETE |
| 11 | 180309 | 1 | ORIFICE #50 METRIC THREADS |
| 12 | 71263 | 1 | GASKET, BURNER ACCESS COVER |
| 12 | 525031 | 1 | SERVICE KIT, GASKET BURNER ACCESS COVER |
| 13 | 121704 | 1 | PLATE, TINNERMAN |
| 14 | 63198 | 1 | PLATE, SECONDARY (BACK) |
| 15 | 121651 | 1 | SCREW 8-18 X 1/2 |
| 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 210651046 |
| 22 | 525009 | 1 | SERVICE KIT, ELECTRODE W/GROMMET (L SHAPE) - Above Serial No 934701426 Ending Serial No 210651046 |
| 22 | 233306 | 1 | ELECTRODE & WIRE ASSY (STRAIGHT) - Above Serial No 210651046 |
| 22 | 525051 | 1 | SERVICE KIT ELECTRODE, STRAIGHT - Above Serial No 210651046 |
| 23 | 10799 | 1 | BURNER ASSY, MAIN |
| 24 | 70963 | 1 | GROMMET |
| 26 | 161122 | 1 | GAS VALVE, 3/8 INLET NPT X 3/8 INVERTED OUTLET |
| 27 | 171574 | 1 | PIPE ASSEMBLY,GAS INLET |
| 28 | 62180 | 1 | CLAMP, WIRE |
3. Vent, blower and ignition assemblies
| Reference | Manufacturer part number | Quantity | Component description |
|---|---|---|---|
| 31 | 260231 | 1 | VENT CAP & EXHAUST TUBE ASSY |
| 32 | 51248 | 1 | VENT TUBE, INTAKE USE 51446 |
| 32 | 51446 | 1 | VENT TUBE, INTAKE |
| 33 | 280582 | 1 | RAIN SHIELD |
| 34 | 390852 | 1 | COMBUSTION AIR HOUSING (FRONT) |
| 35 | 121929 | 4 | SCREW, #8 - 18 X 2 1/4 |
| 36 | 121928 | 8 | SCREW 6-19 X 1/2 PH PH |
| 37 | 390848 | 1 | COMBUSTION AIR HOUSING (REAR) |
| 38 | 350183 | 1 | WHEEL, COMBUSTION AIR |
| 39 | 71084 | 1 | GASKET, FIREWALL COMBUSTION AIR |
| 40 | 233043 | 1 | MOTOR ASSY W/ GASKET |
| 41 | 121971 | 2 | SCREW # 4-24 X 5/8 |
| 42 | 391052 | 1 | BLOWER ASSY, ROOM AIR, FRONT HALF |
| 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 | 21226 | 1 | CHAMBER ASSY, FINAL |
| 59 | 232505 | 1 | LIMIT SWITCH 195 DEGREE |
| 59 | 525035 | 1 | SERVICE KIT, LIMIT SWITCH 195 OPEN/155 CLOSED |
| 62 | 110792 | 1 | FIREWALL |
| 65 | 102078 | 1 | PANEL ASSY, MODULE BOARD |
| 67 | 70807 | 1 | INSULATOR, MODULE BOARD |
| 68 | 63616 | 1 | BRACKET HOUSING, ROOM & COMB AIR |
| NS | 6258ACW | 1 | FURNACE, ACCESS DOOR SF- COLONIAL WHITE |
| NS | 6258APW | 1 | FURNACE, ACCESS DOOR SF- POLAR WHITE |
| NS | 2609A | 1 | FURNACE CORE REPLACEMENT RP-35Q |