Forest River Berkshire – Furnace Igniter & Control Board Replacement

The most expensive mistake RV owners make is replacing parts before they’ve diagnosed the actual problem. I’ve walked up to rigs where the owner has already swapped three components and the real issue is something a five-dollar fuse or a loose connector would have fixed. Diagnosis first. Always diagnosis first. The furnace system on a Forest River Berkshire is one I’ve worked on more times than I can count — and nine times out of ten, when an owner tells me their furnace won’t light, they’ve already ordered a new igniter before checking whether the control board is even sending a signal, or whether a cracked flame sensor or a dirty sail switch is the real culprit. Get the diagnosis wrong on a furnace repair and you’re either camping cold in February or you’re burning through a second round of parts — and in a coach like the Berkshire, neither one is cheap or fun. This guide is built from actual on-site calls, not manufacturer literature, so follow the sequence exactly and you’ll know what you actually need to fix before you spend a dime on parts.

The Igniter That Actually Lights on the First Call — Suburban 232286 for Berkshire SF-Series

When a Berkshire furnace won’t ignite, nine times out of ten it’s the electrode igniter sitting there firing into dead air while the control board keeps cycling. This igniter assembly is the spark plug of your furnace system — if it’s cracked, carboned up, or the wire’s gone intermittent, you’re looking at a no-light failure that feels like the whole board’s bad until you actually test continuity on the electrode itself.

What works

• Drop-in fit on SF-20 through SF-35 Suburban cores — no modification, no adapter nonsense, bolt it in and you’re done.
• The wire harness is already pre-assembled so you’re not field-splicing anything that will arc or loosen three months down the road.
• Spark gap is factory-set to spec — you hear that audible click-click-click ignition sound again on first try instead of endless blower cycling.

What doesn’t

• Amazon fulfillment on this part is spotty — you can easily wait 5-7 days for stock, which is brutal when you’re parked in November without heat.
• If your control board is actually the failure point (not the igniter), swapping this will leave you right back where you started, so test the board first with a multimeter before ordering.

I once pulled an igniter that *looked* perfect visually but had an intermittent crack in the ceramic you could only see under light — the furnace would light 3 times then fail until the igniter cooled down, driving the owner crazy with no pattern. 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.