The DFSD16121 is the less-door variant of the 16K small furnace. Its parts reference includes vent cover components and extended manifold fittings not present in the normal access-door configuration.
Match the drawing callout to the manufacturer part number and quantity in the table. Select a linked number for product details and availability, and check the furnace model and serial-number restrictions before ordering.
Parts pictured in this guide
Select an image for product details, or jump to the numbered diagram and parts list. Match the part number and furnace model before ordering.
Original DFSD16121 part references
| Drawing reference | Manufacturer part number | Quantity | Component description |
|---|---|---|---|
| 4503 | 30320 | 1 | CIRCUIT BREAKER, 5 AMP |
| 4510 | 35100 | 1 | ELECTRODE |
| 4516 | 31098 | 1 | VALVE 12VDC TOP |
| 4524 | 31093 | 1 | SAIL SWITCH-WHITE - For S# 72498929 & Below |
| 4524 | 33063 | 1 | SAIL SWITCH-DF-BLACK USE 33082 |
| 4524 | 33081 | 1 | SAIL SWITCH - For S# After 72498929 |
| 4527 | 33065 | 1 | SAIL SWITCH MOUNT |
| 4541 | 31501 | 1 | CIRCUIT BOARD |
| 4550 | 30758 | 1 | MOTOR S12-16 |
| 4560 | 31091 | 1 | LIMIT SWITCH 190 DEG |
| 4565 | 35712 | 1 | MANIFOLD EXT ASSM |
| 4575 | 36688 | 1 | DUCT ADAPTER 2 INCH |
| 4576 | 31474 | 1 | DUCT ADAPTER 4 INCH |
| 4577 | 31361 | 1 | DUCT COVER PLATE 4 INCH |
| 4579 | 31388 | 1 | DUCT ADAPTER 5 INCH |
| 4581 | 30268 | 1 | BURNER HEAD, LP GAS |
| 4583 | 32223 | 1 | ADAPTER PLATE 5 INCH-4 INCH |
| 4598 | 31083 | 1 | ORIFICE #56 LP |
| 4610 | 31244 | 1 | CASING LEG |
| 4626 | 31113 | 1 | BLOWER WHEEL |
| 4630 | 33128 | 1 | COMBUSTION AIR WHEEL |
| 4681 | 30456 | 1 | VENT COVER PANEL USE 31367 |
| 4681 | 31367 | 1 | VENT COVER PANEL V3-V4 |
| 4689 | 33055 | 1 | VENT PANEL EXTENSION |
| 4705 | 33050 | 1 | DOOR VENT ASSEMBLY |
| 4745 | 30260 | 1 | FRONT GRILL-LD |
| 4746 | 30259 | 1 | FRONT GRILL-OD |
| 4755 | 32300 | 1 | WALL THERMOSTAT, HEAT ONLY BLACK |
| 4756 | 38452 | 1 | WALL THERMOSTAT, HEAT ONLY BROWN |
| 4757 | 38453 | 1 | WALL THERMOSTAT, HEAT ONLY WHITE |
| 4846 | 30745 | 1 | BLOWER HOUSING |
| 4851 | 32446 | 1 | BLOWER HOUSING COVER |
| 4855 | 33060 | 1 | WIRING HARNESS DC |
| 4862 | 33170 | 1 | EXHAUST ADAPTER .830 |
| 4868 | 33300 | 1 | HEAT EXCHANGER SMALL |