The first thing I do when I buy a used rig at auction is skip the cosmetics entirely and go straight to the mechanical systems. How a previous owner maintained the furnace, the AC, the water heater — that tells me everything I need to know about how the whole coach was treated. On DRV Mobile Suites specifically, the furnace igniter and control board are two of the first components I check, because a neglected furnace almost always means a neglected rig — and a failed igniter or a fried control b But here’s what I learned the hard way: a failed control board can sit dormant for months before it actually dies, and you might not catch it until you’re parked somewhere cold and the furnace suddenly won’t kick on.oard will leave you with a cold coach and a frustrating diagnostic rabbit hole if you don’t know what you’re looking at. The good news is that this is a very doable repair if you approach it systematically, and I’ve walked through this exact job enough times on enough DRV units that I can tell you precisely where things go wrong and how to fix them right the first time. Whether you’re repairing your own Mobile Suites or turning a problem rig into profit, this guide will get your furnace firing reliably again — no guesswork, no unnecessary parts swaps.
The Control Board That Told Me the Whole Story of Neglect
When I pulled the furnace panel on my DRV and saw a scorched, cracked circuit board, I knew immediately: this rig hadn’t been winterized properly, and moisture had done serious damage over years. A fried control board is often the final verdict on a furnace’s condition, and replacing it is the only way forward.
What works
- Direct plug-and-play fit for DRV and most Suburban/Atwood furnaces — no rewiring or adapter hunting required.
- Restored my furnace from a completely dead unit to reliable operation on the first test cycle.
- Far cheaper than a full furnace replacement and fixes 90% of “furnace won’t ignite” problems without touching anything else.
What doesn’t
- Diagnosing whether the board is actually the culprit requires a multimeter and patience — a bad igniter or sail switch can look identical to the untrained eye.
- If the furnace has other corrosion damage inside the housing, a new board won’t save it; you’ll discover that only after installation.
I almost gave up and ordered an entire new furnace unit before a fellow RV tech convinced me to test the board first — and I’m glad I listened. Pick up a furnace circuit board / control board and see if it brings your ignition system back to life.
This post contains affiliate links. As an Amazon Associate, I earn from qualifying purchases at no extra cost to you.
