The Suburban SF-20VHFQ is a 20,000 BTU low-profile furnace configuration that does not require an exterior access door. Its illustrated parts guide separates cabinet items, burner and fuel components, and the motor, circulating air and exhaust system.
Use the diagrams and parts tables together to identify each component, its quantity and any serial-number restrictions. Match the full furnace model and original part number before ordering.
SF-20VHFQ cabinet and thermostat references
| Drawing reference | Manufacturer part number | Quantity | Component description |
|---|---|---|---|
| 1A | 102316 | 1 | CABINET FRONT ASSEMBLY 2-HOLE |
| 2 | 161154 | 1 | THERMOSTAT, WALL (WHITE) |
| 3 | 71195 | 1 | GASKET, BOTTOM DUCT |
| 3 | 521260 | 1 | GASKET, VERICAL BOTTOM (10 PACK) |
| 5 | 103134 | 1 | CABINET ASSEMBLY |
| 5B | 63516 | 1 | BRACKET, CABINET MOUNTING |
| 5C | 63514 | 1 | BRACKET, REAR VERTICAL MOUNTING |
| 6 | 50733 | 2 | COVER, DUCT |
| 7 | 50715 | 2 | DUCT COLLAR, 4 IN. |
SF-20VHFQ burner, gas valve and electrode group
| Drawing reference | Manufacturer part number | Quantity | Component description |
|---|---|---|---|
| 9 | 171743 | 1 | MANIFOLD ASSY, COMPLETE |
| 11 | 180305 | 1 | ORIFICE #55 METRIC THREADS |
| 12 | 71263 | 1 | GASKET, BURNER ACCESS COVER |
| 15 | 121651 | 1 | SCREW 8-18 X 1/2 |
| 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 |
| 22.1 | 525009 | 1 | SERVICE KIT, ELECTRODE W/GROMMET (L SHAPE) - Above Serial No 934701426 Ending Serial No 171416095 |
| 22 | 233497 | 1 | ELECTRODE 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 |
| 26 | 161122 | 1 | GAS VALVE, 3/8 INLET NPT X 3/8 INVERTED OUTLET |
| 27 | 171574 | 1 | PIPE ASSEMBLY,GAS INLET |
| 27A | 171576 | 1 | PIPE ASSY, GAS INLET |
| 29A | 170374 | 1 | GAS FITTING, 90° ELBOW |
SF-20VHFQ motor, blower and exhaust system
| Drawing reference | Manufacturer part number | Quantity | Component description |
|---|---|---|---|
| 31 | 260553 | 1 | VENT CAP AND EXHAUST TUBE ASSEMBLY |
| 32 | 51248 | 1 | VENT TUBE, INTAKE USE 51446 |
| 32 | 51446 | 1 | VENT TUBE, INTAKE |
| 33 | 280582 | 1 | RAIN SHIELD |
| 36 | 122001 | 2 | SCREW, #6-19 X 3/4 |
| 38 | 521234 | 1 | WHEEL, COMBUSTION AIR |
| 39 | 72087 | 1 | GASKET, FIREWALL |
| 40 | 521230 | 1 | MOTOR ASSEMBLY, W/GASKET |
| 41 | 121971 | 1 | SCREW # 4-24 X 5/8 |
| 42 | 521259 | 1 | BLOWER HOUSING, FRONT HALF |
| 43 | 121857 | 5 | SCREW #8-18 X 1/2 |
| 44 | 521254 | 1 | BLOWER HOUSING , REAR HALF |
| 45 | 232261 | 1 | SWITCH, SAIL USE 233382 |
| 45 | 233382 | 1 | SAIL SWITCH |
| 48 | 232351 | 1 | ON/OFF SWITCH |
| 50 | 521099 | 1 | IGNITION CONTROL MODULE |
| 52 | 521233 | 1 | BLOWER WHEEL, ROOM AIR |
| 54 | 70362 | 1 | BUSHING, SNAP |
| 56 | 71206 | 1 | BUSHING, STRAIN RELIEF |
| 58 | 21373 | 1 | CHAMBER/FIREWALL ASSY, FRONT GAS MODELS |
| 58 | 21374 | 1 | CHAMBER/FIREWALL ASSY, REAR GAS MODELS |
| 59 | 232504 | 1 | SWITCH, LIMIT USE 233532 |
| 59 | 233532 | 1 | SWITCH, LIMIT 160 DEGREE |
Replacement parts pictured at NewRVParts
The linked product listings correspond to manufacturer numbers shown in the reference tables. Confirm the complete furnace model, applicable serial range and component revision before ordering. Check individual listings for current availability.
Diagram ref 2 · MPN 161154
Suburban 161154 White Heat-Only Mechanical RV Furnace Thermostat
View product and availability
Diagram ref 40 · MPN 521230
Suburban 521230 12V Furnace Motor | SF Q/FQ & Select VHQ
View product and availability
Diagram ref 48 · MPN 232351
Suburban 232351 Furnace On/Off Switch | Select SF, SH & NT
View product and availability