The Dinosaur Electronics FAN50PLUSPINS Fan 50 Plus Ignitor Board is a drop-in upgrade that brings modern fan control logic and reliable 3-try ignition to older 12V DC DSI RV furnaces. It eliminates cold-air blowback, protects your battery, and shuts down safely when propane is absent or ignition fails -- all in a compact 3-1/4" x 4-1/4" board backed by a 3-year limited manufacturer warranty.
Older RV furnace control boards often lack integrated fan control logic, which means the blower motor can keep running even when the burner fails to light -- pumping cold air into your rig and draining your 12V system. The Dinosaur Fan 50 Plus board solves this with a purpose-built fan control circuit that monitors the entire ignition cycle and responds intelligently to what the furnace is actually doing.
On every call for heat, the board manages the ignition sequence, watches for a confirmed flame, and controls the blower accordingly. If propane runs out or the burner does not light, the board attempts ignition up to three times, then locks out and shuts the fan off. No cold air, no wasted battery, no guessing.
Attempts ignition three times before shutting the fan motor off, preventing extended cold-air blowing and unnecessary battery drain during a failed ignition event.
Actively monitors for a confirmed burner flame. If flame is not sensed after three attempts, the board shuts down safely rather than continuing to cycle.
Fully compatible with Fan 50 Plus and UIB fan control board wiring schemes, including Suburban and Hydro Flame furnaces that use the factory fan control feature.
The circuit detects when propane has been exhausted and the furnace cannot light, triggering lockout without repeated failed ignition attempts that waste power.
This board is designed for RV owners and technicians who need to either replace a failed ignitor board or add fan control capability to an older furnace that did not originally include it. If your furnace is blowing cold air, failing to light reliably, or running the blower after a failed ignition attempt, this board addresses all three issues in a single replacement.
It is also a popular upgrade for 12V DC DSI furnaces that were originally equipped with a basic ignitor board lacking fan control logic. Installing the Fan 50 Plus board implements that feature without modifying the furnace cabinet or replacing the entire unit.
The FAN50PLUSPINS is compatible with the following furnace and board types:
The Fan 50 Plus board is designed as a direct replacement for the boards listed above. Standard board-swap procedure applies: disconnect 12V power and propane before beginning, remove the existing board, transfer connectors to the new board matching pin positions, and restore power before testing. Board dimensions of 3-1/4" x 4-1/4" are consistent with original Suburban and Hydro Flame board footprints in most applications.