Tiffin Wayfarer – Furnace Igniter & Control Board Replacement

Knowing how to diagnose and repair RV systems isn’t just a maintenance skill — it’s a negotiation weapon when you’re buying. Every mechanical issue I can identify on a walkthrough is money off the asking price. Most sellers don’t know what’s wrong with their own rig, which means an informed buyer has all the leverage. The furnace on a Tiffin Wayfarer is one of those systems that fails quietly — the igniter cracks, the control board stops sending signal, and the owner just assumes it’s a “quirk” they’ve learned to live with, never realizing it’s a straightforward fix that a savvy buyer can use to knock a few hundred dollars off the deal. I’ve replaced enough of these igniter and control board combos to know exactly where they fail, what parts you actually need, and how to get the furnace firing reliably again — and that’s exactly what this guide walks you through.

The Igniter That Stops the “It Won’t Light” Guessing Game on Tiffin Wayfarer Furnaces

The Suburban furnace igniter cracks from thermal cycling — especially on older Wayfarers that see real temperature swings — and the control board stops recognizing spark, so you’re left with no heat and no error code. This electrode assembly is the crux of the diagnosis: swap it, and either your furnace fires up or you know the problem is downstream in the control board.

What works

• Drop-in replacement for SF-series Suburban ignition — wire harness plugs straight into the control board without rewiring or adapters.
• You’ll hear spark immediately on ignition cycle; that’s your confirmation the electrode is making contact and the control board is still talking to it.
• Catches the real failure point before you throw money at a control board you don’t actually need to replace.

What doesn’t

• Shipping from third-party sellers can stretch to 2–3 weeks; if you’re broken down in January, this stings.
• Some aftermarket igniters have slightly loose wire strain relief; you’ll need to verify the connector seat firmly before buttoning up the furnace cabinet.

I’ve had this igniter arrive and watched the spark gap test fail because the wire wasn’t fully seated in the connector — thirty seconds of wiggling fixed it, but that moment of doubt cost me an hour of troubleshooting when I should have been on the road. 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)

This post contains affiliate links. As an Amazon Associate, I earn from qualifying purchases at no extra cost to you.