Dometic DFMD25121 Less-Door Furnace Service Parts

The DFMD25121 has the less-door small-vent arrangement, rather than the conventional medium access door. Its manufacturer-numbered table identifies the vent cover panel, extension, manifold hardware and core 25K furnace components separately.

Use the diagram callouts to find the original manufacturer number in the table below. Select a linked part number for product details and availability. Check the full furnace model, serial-number range and any replacement notes 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.

Atwood 30335 AFMD25 Furnace Circuit Breaker - 10 Amp — DFMD25121 reference 4501Atwood 30335 AFMD25 Furnace Circuit Breaker - 10 AmpPart 30335 · Drawing reference 4501
Atwood / Dometic 35100 Small Furnace Ignition Electrode Kit - AFMD — DFMD25121 reference 4510Atwood / Dometic 35100 Small Furnace Ignition Electrode Kit - AFMDPart 35100 · Drawing reference 4510
Atwood 31501 12V DSI Furnace Ignition Board With Fan Control — DFMD25121 reference 4541Atwood 31501 12V DSI Furnace Ignition Board With Fan ControlPart 31501 · Drawing reference 4541
Dometic 30722 Furnace Blower Motor Kit for AFMD25/30 — DFMD25121 reference 4549Dometic 30722 Furnace Blower Motor Kit for AFMD25/30Part 30722 · Drawing reference 4549
Atwood 31091 190°F RV Furnace High-Limit Safety Switch — DFMD25121 reference 4560Atwood 31091 190°F RV Furnace High-Limit Safety SwitchPart 31091 · Drawing reference 4560
Dometic 36688 Atwood 2-Inch RV Furnace Duct Adapter — DFMD25121 reference 4575Dometic 36688 Atwood 2-Inch RV Furnace Duct AdapterPart 36688 · Drawing reference 4575
Atwood 31474 Aluminum 4-Inch RV Furnace Duct Collar — DFMD25121 reference 4576Atwood 31474 Aluminum 4-Inch RV Furnace Duct CollarPart 31474 · Drawing reference 4576
Dometic 31361 4-Inch RV Furnace Duct Knockout Cover Plate — DFMD25121 reference 4577Dometic 31361 4-Inch RV Furnace Duct Knockout Cover PlatePart 31361 · Drawing reference 4577
Atwood 30268 LP-Gas Furnace Burner Head — DFMD25121 reference 4581Atwood 30268 LP-Gas Furnace Burner HeadPart 30268 · Drawing reference 4581
Dometic 33050 Mojave RV Furnace Exhaust Vent Kit, 5-1/2 in — DFMD25121 reference 4705Dometic 33050 Mojave RV Furnace Exhaust Vent Kit, 5-1/2 inPart 33050 · Drawing reference 4705
Dometic 32300 Black 12V Heat-Only RV Furnace Thermostat — DFMD25121 reference 4755Dometic 32300 Black 12V Heat-Only RV Furnace ThermostatPart 32300 · Drawing reference 4755
Dometic 38453 White HFH-2000 RV Furnace Thermostat — DFMD25121 reference 4757Dometic 38453 White HFH-2000 RV Furnace ThermostatPart 38453 · Drawing reference 4757
Dometic DFMD25 Mojave medium furnace exploded parts reference for DFMD25121
DFMD25-family service illustration — match the numbered positions with the DFMD25121 reference list.

Original Dometic reference parts for DFMD25121

Reference Manufacturer part number Quantity Component description
4501 30335 1 CIRCUIT BREAKER, 10 AMP
4510 35100 1 ELECTRODE
4516 31098 1 VALVE 12VDC TOP
4524 31094 1 SAIL SWITCH-WHITE - (For S# 72489156 & Below)
4524 33063 1 SAIL SWITCH-DF-BLACK USE 33082
4524 33082 1 SAIL SWITCH
4528 33053 1 SAIL SWITCH MOUNT M-L
4541 31501 1 CIRCUIT BOARD
4549 30722 1 MOTOR 25-30
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
4581 30268 1 BURNER HEAD, LP GAS
4601 30845 1 ORIFICE 1.45MM LP
4610 31244 1 CASING LEG
4615 30205 1 BOTTOM ADAPTER PLATE-VERTICAL
4620 30261 1 BOTTOM ADAPTER PLATE-HORIZONTAL
4625 33126 1 BLOWER WHEEL W/CLAMP
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
4755 32300 1 WALL THERMOSTAT, HEAT ONLY BLACK
4756 38452 1 WALL THERMOSTAT, HEAT ONLY BROWN
4757 38453 1 WALL THERMOSTAT, HEAT ONLY WHITE
4848 30751 1 BLOWER HOUSING-MEDIUM
4852 32444 1 BLOWER HOUSING COVER-MEDIUM
4855 33060 1 WIRING HARNESS DC
4856 33052 1 BOARD & BREAKER BRACKET
4863 33171 1 EXHAUST ADAPTER .875
4869 33301 1 HEAT EXCHANGER-MEDIUM

Save on Parts & Accessories

Sign up for special offers, new product updates, and deals on RV, truck camper, towing, truck, and marine parts and accessories.

About NewRVParts

NewRVParts is an online-only source for brand-new RV parts and accessories, truck camper equipment, towing and trailer parts, truck accessories, and marine products. We serve customers throughout Canada and the United States, with products from trusted manufacturers shipped through a large North American distribution network. Shop online for replacement parts, equipment, and accessories delivered directly to your door.

Shop RV Parts