Atwood AFSD20131 — standard door with rear LP-gas connection. The AFSD20131 has a rear-gas connection in addition to its standard door arrangement. Its model-specific service references distinguish the extended manifold and door-vent configuration from other AFSD20 furnaces.
AFSD20 input rating: 18,000 BTU/hr according to Atwood's AFS technical data. Check the complete furnace identification plate and serial number. The original component references below do not confirm interchangeability across vent and gas-fitting configurations.
AFSD20131 numbered exploded furnace parts
| Reference | Manufacturer part number | Quantity | Historical description |
|---|---|---|---|
| 1 | 30322 | 1 | CIRCUIT BREAKER, 7 AMP |
| 2 | 32343 | 1 | DOOR ASM. SMALL #34 WHITE |
| 2 | 32344 | 1 | DOOR ASM, SMALL #44 BLACK |
| 4 | 30259 | 1 | FRONT GRILL, OD |
| 5 | 31876 | 1 | VENT ADAPTER DOOR |
| 6 | 36688 | 1 | DUCT ADAPTER 2 INCH |
| 7 | 31474 | 1 | DUCT ADAPTER 4 INCH |
| 8 | 31361 | 1 | DUCT COVER PLATE, 4 INCH |
| 9 | 35100 | 1 | ELECTRODE ASM. SMALL |
| 10 | 35711 | 1 | HEAT EXCHANGER, SMALL |
| 11 | 31244 | 1 | CASING LEG |
| 12 | 35706 | 1 | GAS LINE GROMMET |
| 14 | 31501 | 1 | ELECTRONIC IGNITION BOARD |
| 14 | 32353 | 1 | UNIVERSAL IGNITION DC SMT — verify model and service revision |
| 15 | 35712 | 1 | MANIFOLD EXT ASM KIT, SML — verify model and service revision |
| NS | 32349 | 1 | MANIFOLD, INLET SMALL — manifold inlet, not illustrated |
| 16 | 30760 | 1 | MOTOR, S20 — verify model and service revision |
| 17 | 30789 | 1 | ORIFICE 1.25MM LP |
| 18 | 31091 | 1 | LIMIT SWITCH, 190 DEGREE |
| 19 | 31093 | 1 | SAIL SWITCH, SMALL-WHITE - Serial# 724xxxxx and Lower — verify model and service revision |
| 19 | 33063 | 1 | SAIL SWITCH DF-BLACK - NLA - Serial# 724xxxxx and Higher — obsolete; confirm serial |
| 20 | 32300 | 1 | THERMOSTAT, HEAT ONLY, BLACK |
| 20 | 38452 | 1 | T-STAT HEAT ONLY - BROWN |
| 20 | 38453 | 1 | THERMOSTAT HEAT ONLY- WHITE |
| 21 | 31098 | 1 | VALVE 12VDC TOP SMALL — verify model and service revision |
| 22 | 30268 | 1 | BURNER HEAD, LP GAS |
| 24 | 31808 | 1 | DOOR VENT ASM, .750 V4 — verify model and service revision |
| 29 | 31113 | 1 | BLOWER WHEEL, SMALL |
| 30 | 33128 | 1 | COMBUSTION AIR WHEEL |
| 32 | 30641 | 1 | DOOR SMALL, #34 ARCTIC WHITE |
| 32 | 31840 | 1 | DOOR SMALL, #44 BLACK |
| 34 | 31114 | 1 | WIRING HARNESS, DC |
| NS | 32394 | 1 | GASKET, SMALL DOOR V2 |
| NS | 32399 | 1 | GASKET, SMALL DOOR V4 |
Replacement parts pictured at NewRVParts
These linked product listings match manufacturer part numbers shown in the parts table. Check the exact furnace model, serial range and component version before ordering; product listings show current availability.
Diagram ref 6 · MPN 36688
Dometic 36688 Atwood 2-Inch RV Furnace Duct Adapter
View product and availability
Diagram ref 7 · MPN 31474
Atwood 31474 Aluminum 4-Inch RV Furnace Duct Collar
View product and availability
Diagram ref 8 · MPN 31361
Dometic 31361 4-Inch RV Furnace Duct Knockout Cover Plate
View product and availability
Diagram ref 14 · MPN 31501
Atwood 31501 12V DSI Furnace Ignition Board With Fan Control
View product and availability
Diagram ref 18 · MPN 31091
Atwood 31091 190°F RV Furnace High-Limit Safety Switch
View product and availability
Diagram ref 20 · MPN 32300
Dometic 32300 Black 12V Heat-Only RV Furnace Thermostat
View product and availability
Diagram ref 20 · MPN 38453
Dometic 38453 White HFH-2000 RV Furnace Thermostat
View product and availability
Diagram ref 22 · MPN 30268
Atwood 30268 LP-Gas Furnace Burner Head
View product and availability
Diagram ref 30 · MPN 33128
Dometic 33128 Atwood RV Furnace Combustion Wheel Kit
View product and availability
Diagram ref 34 · MPN 31114
Dometic 31114 DC Wiring Harness for Atwood AFMD Furnaces
View product and availability