Entegra Esteem – Furnace Igniter & Control Board Replacement

The full-time RV community is the most generous knowledge-sharing group I’ve ever been part of. Someone has already fixed the exact problem you’re dealing with, documented it in a forum thread, and answered follow-up questions for free. This guide pulls together the best of that collective experience into one place. On the Entegra Esteem, the furnace igniter and control board are the two components most likely to leave you waking up to a 40-degree bedroom at 2 a.m. — the igniter fails to spark, the control board stops cycling properly, and suddenly your propane furnace is just a box of cold metal. Getting this wrong means more than discomfort: in cold climates, a dead furnace can damage plumbing, ruin a trip, or create a genuinely dangerous situation when you’re parked somewhere remote. I’ve been through this repair on my own rig, cross-referenced it against dozens of forum posts from other Esteem owners, and put together the clearest step-by-step breakdown I could so you can diagnose the real culprit and fix it right the first time.

The Igniter That Actually Sparks Reliably on the Esteem’s SF-35

The Suburban 232286 igniter is the weak link in the Esteem’s heating chain—it fails silently, leaving you guessing whether it’s the electrode or the control board until you’re already halfway through diagnostics. Get this probe in first, because nine times out of ten, this is what actually stopped your furnace from igniting.

What works

• Direct fit into the SF-35 combustion chamber with zero modification—the electrode aligns perfectly and sits flush against the burner assembly on first install.
• You get visible spark at the probe tip the moment you power up the furnace, no ambiguity about whether ignition is happening or not.
• The wire assembly routing follows the existing harness channels, so you’re not jury-rigging anything or drilling new holes in your fresh air intake.

What doesn’t

• Some units ship with the probe ceramic already micro-cracked from packing—you won’t know until you’re testing it under load, so inspect before you seal the combustion chamber back up.
• The wire assembly connectors are fragile and corroded by propane vapor over time; if your original igniter lasted less than three seasons, you likely have a deeper moisture or fuel leak issue in the appliance cabinet.

I’ve second-guessed this part choice twice when the furnace still wouldn’t light after swapping it, only to find the control board was dead as well—you may need to test both components before assuming the igniter alone is 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)

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