Atwood AFMD20121 Furnace Parts Diagram & OEM Parts List
Use this Atwood AFMD20121 20,000 BTU ducted furnace (less door) parts breakdown to identify replacement ignition boards, motors, sail switches, thermostats, gas valves, blower wheels, vent kits, duct adapters and other OEM RV furnace service parts.

Atwood AFMD20121 Parts List
| Reference # | Mfg Part Number | Qty | Description |
|---|---|---|---|
| 1 | 30322 | 1 | CIRCUIT BREAKER, 7 AMP |
| 5 | 36688 | 1 | DUCT ADAPTER 2 INCH |
| 6 | 31474 | 1 | DUCT ADAPTER 4 INCH |
| 7 | 30205 | 1 | ADAPTER PLATE KIT, SIDE DISCH |
| 8 | 30261 | 1 | BOTTOM PLATE ADAPTER ASM. |
| 9 | 31361 | 1 | DUCT COVER PLATE, 4 INCH |
| 10 | 35100 | 1 | ELECTRODE ASM. SMALL |
| 11 | 35710 | 1 | HEAT EXCHANGER KIT, M |
| 12 | 31244 | 1 | CASING LEG |
| 13 | 35706 | 1 | GAS LINE GROMMET |
| 14 | 30268 | 1 | BURNER HEAD, LP GAS |
| 15 | 31501 | 1 | ELECTRONIC IGNITION BOARD |
| 15 | 32353 | 1 | UNIVERSAL IGNITION DC SMT |
| 16 | 35712 | 1 | MANIFOLD EXT ASM KIT, SML |
| NS | 32349 | 1 | MANIFOLD, INLET SMALL |
| 17 | 30730 | 1 | MOTOR KIT |
| 18 | 30829 | 1 | ORIFICE KIT 1.30MM LP |
| 19 | 31091 | 1 | LIMIT SWITCH, 190 DEGREE |
| 20 | 31093 | 1 | SAIL SWITCH, SMALL-WHITE - Serial# 724xxxxx and Lower |
| 20 | 33063 | 1 | SAIL SWITCH DF-BLACK - NLA - Serial# 724xxxxx and Higher |
| 21 | 32300 | 1 | THERMOSTAT, HEAT ONLY, BLACK |
| 21 | 38452 | 1 | T-STAT HEAT ONLY - BROWN |
| 21 | 38453 | 1 | THERMOSTAT HEAT ONLY - WHITE |
| 23 | 31098 | 1 | VALVE 12VDC TOP SMALL |
| 23 | 31096 | 1 | VALVE KIT, 12VDC -V1 SML |
| 25 | 30578 | 1 | VENT LD KIT, NB V3 |
| 25 | 31813 | 1 | VENT LD KIT, NB V4 |
| 27 | 32296 | 1 | VENT LD KIT, NB V4 MW |
| 29 | 30197 | 1 | VENT COVER PANEL SM V2-W |
| 29 | 30456 | 1 | VENT PANEL EXTENSION SML V3 |
| 29 | 30457 | 1 | VENT PANEL EXTENSION SML V3 |
| 30 | 30611 | 1 | VENT PANEL EXTENSION SML V4 |
| 31 | 33128 | 1 | COMBUSTION AIR WHEEL |
| 32 | 33126 | 1 | BLOWER WHEEL KIT |
| 33 | 31114 | 1 | WIRING HARNESS, DC |
| NS | 31923 | 1 | VENT PANEL EXTENSION SM V1 |
Click any manufacturer part number above to search our inventory. If you cannot find the part you need, contact us with your furnace model number, serial number and part number.
Recently viewed
New & Updated RV Parts Inventory — Check Back Often
We’re always adding new and used RV parts to our inventory, so be sure to check back regularly.
If you don’t see the part you need today, we may still have it in stock—our internal database includes thousands of new RV parts that are not yet listed online.
Text or email us with the product number or model, and we’ll check availability for you right away.
Our Products