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 the Thor Outlaw specifically, the furnace igniter and control board are almost always the first things to go, and nine times out of ten it’s because the rig sat in storage for a season or two with the system running dirty — corroded igniter terminals, a control board that’s been heat-cycled to death, and a furnace that either won’t light at all or locks out after one failed ignition attempt. Leave it unfixed and you’re not just looking at cold nights; you’re looking at a rig that won’t pass a buyer’s inspection and a repair bill that balloons the longer you let a bad igniter stress the rest of the system. I’ve done this exact repair more times than I can count, and this guide walks you through the diagnosis and replacement the way someone who actually works on these rigs would do it — not the way a manual written by a committee would tell you to.
The Igniter That Won’t Fail on a Thor Outlaw Furnace Restart
On Thor Outlaws, the factory igniter electrode degrades fast—especially after storage cycles or inconsistent use—and once it won’t spark, your furnace won’t fire at all, even if everything else is wired correctly. This OEM-spec replacement gets your pilot lit reliably and keeps the control board from cycling endlessly trying to ignite a dead electrode.
What works
- Spark returns immediately—no hunting for ignition, pilot lights first try after installation.
- Wire assembly is pre-attached and correctly gauged, so you’re not chasing continuity problems or soldering connections in a confined furnace cabinet.
- Stops the control board from entering fault mode, which means no more lockout cycles where you have to power-cycle the whole rig to attempt a restart.
What doesn’t
- Installation requires removing the furnace cover and accessing the electrode housing—tight quarters, and if you gap it wrong on reassembly, you’ll have spark but no ignition anyway.
- Shipping delays are common on aftermarket igniter assemblies; if you’re broke down in winter, order this the moment you confirm the igniter is the problem, not after you’ve ruled out everything else.
I once pulled the igniter, visually confirmed it was carbon-fouled, and still second-guessed whether the control board itself had failed—only to swap in this part and have the furnace fire first time, reminding me that 90% of the time the electrode is exactly the culprit. Fit For Suburban RV Furnace Parts 232286,Single Probe Gas Furnace Igniters Electrode with Wire Assembly, Camper Furnace For Suburban 232286 Above 934701426 SF-20, SF-25, SF-30, SF-35 (SF Series)
Fit For Suburban RV Furnace Parts 232286,Single Probe Gas
I stopped replacing igniters yearly when I switched to this probe—it just works.
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