RV Furnace Parts
When an RV furnace runs the blower but never lights, the culprit is almost never the whole unit. It's usually a sail switch that isn't sensing airflow, a combustion wheel packed with dust, or a cracked burner gasket. This category covers those wear items plus the floor and wall registers the ducting feeds, in OEM Suburban parts and universal pieces from RV Designer, JR Products, and MC Enterprises.
89 products
RV Designer Dampered Provent Register | 4" Black
RV Designer Provent Dampened Vent | 4" White Furnace/AC Register
RV Designer Rotaire Register | 4" Beige Furnace/AC Vent with Damper
B&B Molders 2x10 Floor Register | No Damper, Polar White HVAC Vent
4" x 10" Steel Floor Register | Undampered, Black Powder-Coat
AP Products Floor Register | 4 in. x 10 in., White
AP Products Floor Register | 4 in. x 8 in., White
RV Heat Vent, 2" Duct Connection | No Damper, Black
Suburban Furnace Air Housing Gasket | NT/P Series
Fixing an RV furnace with the right part
Furnace troubleshooting follows the same sequence the furnace runs at startup: 12-volt power comes on, the blower spins up, the sail switch senses airflow and closes, then the board lets the gas valve and igniter fire. Find where that chain breaks and the failed part is usually obvious.
- Sail switches. The most common no-heat culprit. The blower has to move enough air to push the sail switch closed before the burner will light, a safety interlock so the furnace never fires without airflow. A stuck or misadjusted switch like the MC Enterprises 36165MC normally-closed unit stops ignition cold.
- Combustion air wheels. The Suburban combustion air wheel feeds air to the burner. Caked with dust or with bent blades, it gives you poor combustion or none at all. Match the OEM wheel to your Suburban model rather than guessing.
- Burner gaskets and service kits. The Suburban burner access gasket kit (525031) reseals the burner box after you clean or inspect it. Skip the fresh gasket and you invite a combustion leak.
- Vent caps. The exterior cap, like the Suburban 260231 twist-on, keeps weather and pests out of the exhaust. A missing or crushed cap is worth replacing before it lets water into the furnace.
- Registers. The floor and wall outlets your ducting terminates at: RV Designer's Rotaire and Provent dampered registers and JR Products steel floor registers. Dampered versions let you close off heat to a room, and the same 4-inch registers also serve A/C ducting.
Match OEM parts like the combustion wheel and gaskets to your exact Suburban or Dometic model number. If the furnace itself is past saving, the full units are in RV Furnaces, and a plug-in backup lives in Portable & Space Heaters.