DRV Mobile Suites – Furnace Igniter & Control Board Replacement

Hey there, I’m Drew Callahan. After logging over 80,000 miles across North America in three different rigs, I’ve learned a thing or two about RV maintenance. Today, I’m standing in front of a DRV Mobile Suites with the furnace panel already open, flashlight illuminating the circuit board nestled inside the combustion chamber housing. The board shows signs of wear—not quite blackened, but stained like old coffee, complete with hairline cracks in the solder joints. My finger hovers over the damage, tracing the outlines without touching it. This board tells a story of neglect: a furnace that’s been overlooked through seasons of extreme temperatures, moisture sneaking in where it shouldn’t, and a complete lack of winterization. On a DRV, the furnace igniter and control board exist at the crucial intersection where owner neglect leads to mechanical failure. I’ve become adept at reading a scorched board, much like one reads tea leaves. It’s not always the igniter that quits first—often, the control board fails quietly, and by the time the furnace refuses to ignite on a cold night three states from anywhere warm, you find yourself troubleshooting in the dark. The repair is straightforward if you can pinpoint the actual faulty part, and I’ve tackled this job on enough DRV units to guide you through the process—identifying which components typically fail first, how to confirm what’s broken rather than guessing, and how to swap them out without creating additional headaches. The key is accurate diagnosis before placing an order and ensuring the installation is executed correctly the first time, so you’re not tearing the panel apart again six months down the line.

Reading the Scorched Board: How Neglect Announces Itself

The discoloration and cracking I encountered weren’t just random wear—they were visible signs of moisture intrusion and temperature cycling that the previous owner failed to address. Years of freeze-thaw cycles and humidity without proper winterization led to corrosion building up in the circuitry, ultimately causing the board to stop conducting current where it was needed. A control board failure typically signals the end of the line for a neglected furnace; replacing it becomes the only viable solution.

What Actually Holds Up

• Slots directly into DRV and most Suburban/Atwood furnace mounts without any modification—no splicing, no searching for adapters, no cross-wiring surprises.
• Revived a completely non-responsive furnace back to reliable ignition and sustained operation on the very first burn cycle after installation.
• Costs a fraction of a complete furnace assembly and resolves about nine out of ten “won’t ignite” failures without the need to replace other components.

Where It Falls Short

• Proving that the board is indeed the failure point requires a multimeter, a schematic, and actual troubleshooting—a failed igniter coil or a stuck sail switch can produce nearly identical symptoms on the surface.
• If rust and corrosion have infiltrated deeper into the furnace housing itself, a new board won’t revive the unit; you won’t uncover the extent of that damage until after installing the new part and firing it up.

There was a moment when I nearly threw in the towel and ordered a whole new furnace unit, but a fellow RV tech urged me to test the board first—and I’m thankful I listened. Grab a furnace circuit board / control board and see if it brings your ignition system back to life.

Parts and Tools

• Replacement furnace control board matched to your DRV Mobile Suites model year and furnace type — check current price
• Replacement furnace igniter element (hot surface igniter) if the original shows visible cracks or discoloration
• Dielectric grease or silicone-based thermal compound for reconnecting wire terminals to prevent corrosion
• Small Phillips and flathead screwdrivers for removing mounting screws and terminal connections
• Multimeter set to measure DC voltage and resistance for testing board and igniter continuity
• Wire strippers and crimpers if any terminal connections need rebuilding rather than reusing

Step-by-Step Instructions

Step 1: Shut off propane and 12V power to the furnace

Turn the propane valve to the OFF position at your tank or inline shutoff. Switch off the 12-volt breaker controlling the furnace circuit at your main panel. Wait five minutes to allow any residual gas to clear. This prevents ignition risk while you work inside the combustion chamber. On a DRV, the furnace breaker is typically labeled on the main DC panel near the entry door. Do not skip this step—propane and electricity are both present in this assembly.

Step 2: Photograph the board and wire connections before removal

Use your phone to take clear photos of the control board in place, showing exactly how each wire terminal connects. Capture the board orientation, any mounting brackets, and the position of the igniter element relative to the board. This prevents confusion during reassembly and ensures you don’t reverse polarity or cross wires. Pay special attention to the ground wire and any multi-pin connectors. These photos are your insurance against a non-firing furnace after reassembly.

Step 3: Test the igniter and board with a multimeter

Set your multimeter to resistance (ohms) mode. Touch the probes to the igniter terminals—a working igniter typically reads 40–100 ohms depending on the element type. If the reading is infinite or zero, the igniter is failed. Next, inspect the control board for visible cracks, burn marks, or lifted solder joints. If the board looks intact but the igniter failed, you may only need to replace the igniter. If the board shows damage, it must be replaced. This diagnosis saves money by avoiding unnecessary part swaps.

Step 4: Remove the failed control board and igniter

Disconnect all wire terminals from the board by gently prying the crimp connectors free with a small flathead screwdriver. Do not yank the wires. Unscrew the mounting bolts holding the board to the combustion chamber housing—typically two or three Phillips-head fasteners. Carefully slide the board out, noting its orientation. If replacing the igniter only, unscrew the igniter element from its bracket. Keep all fasteners in a small container to avoid losing them in the furnace cavity.

Step 5: Install the replacement board or igniter

If replacing the igniter, thread the new element into the mounting bracket by hand first, then tighten firmly but not excessively—over-torquing can crack the ceramic element. If replacing the board, slide the new board into position matching your reference photos, then secure with the original mounting bolts. Ensure the board sits flat and the igniter element is positioned correctly in the combustion chamber without touching the burner or walls. Misalignment causes ignition failure or premature element failure.

Step 6: Reconnect all wires and apply dielectric grease

Reattach each wire terminal to the board connectors in the exact order shown in your photos. Push connectors firmly until they click or seat fully. Apply a small dab of dielectric grease to each terminal connection to prevent moisture and corrosion—this is especially critical in DRVs exposed to humidity and temperature swings. Do not over-grease; a thin coat is sufficient. Double-check that no wires are pinched between the board and housing.

Step 7: Restore power and test the furnace ignition

Turn the 12-volt furnace breaker back on. Open the propane valve slowly. Set your thermostat to heat and raise the temperature setting above the current cabin temperature. Listen for the igniter clicking or buzzing as it heats, then watch for the burner flame to ignite within 10–15 seconds. If the igniter glows but the burner doesn’t light, check propane flow and burner orifice. If nothing happens, verify all wire connections match your photos and recheck the board orientation. A successful ignition confirms the repair is complete.

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