Entegra Esteem – Furnace Igniter & Control Board Replacement

Most RV owners treat their furnace igniter like a set-it-and-forget-it component—right up until the moment they actually need heat and nothing happens. The reality on an Entegra Esteem is harsher: the igniter fails quietly, the control board stops responding predictably, and you’re left in the dark (literally) trying to figure out which one killed your heating system. This confusion costs money and comfort. I’ve crawled under enough Esteems to know that owners often replace the wrong part first, then discover the real culprit after a second service call. The furnace igniter and control board are your two most probable failure points—one sparks the burner, the other sequences the whole cycle—and getting the diagnosis right the first time means you sleep warm that night instead of chasing your tail in the dark. I’ve torn into this repair on my own rig, combed through what Esteem owners have documented online, and mapped out a straightforward diagnostic and replacement procedure so you can pinpoint exactly which component has actually quit on you.

The Suburban 232286 Igniter: Why It Fails and How to Know

The Suburban 232286 igniter sits at the sharp end of your SF-35’s combustion chamber, and it’s where most Esteem owners run into trouble—the probe wears out, the ceramic cracks, and suddenly there’s no spark to light the propane. Nine times out of ten, this is the culprit you’re actually hunting for.

Where it performs

• Slips into the SF-35 chamber with no fitting, no drilling, no adapter—the electrode lands exactly where it should and seats flush against your burner the instant you install it.
• You’ll see spark jump across the probe tip as soon as you energize the furnace; there’s no guesswork about whether ignition is actually occurring.
• The connector harness follows your existing wire runs and vacuum lines without forcing anything through new holes or requiring rework on your intake ducting.

Where it stumbles

• The ceramic probe sometimes arrives with hairline fractures already present from shipping and handling; always fire-test the replacement before you button the combustion box back up.
• Connector terminals corrode from propane vapor exposure over multiple heating seasons; if your old igniter barely made it three winters, suspect a leak or moisture trap somewhere in your appliance enclosure that’s eating the electronics.

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)

Parts and Tools

• Replacement igniter probe assembly with ceramic electrode and wire harness, matched to Suburban 232286 specifications — check current price
• Control board replacement unit compatible with Suburban SF-35 furnace in Entegra Esteem models
• Propane line wrench or adjustable wrench sized to fit furnace gas inlet fitting
• Multimeter capable of measuring DC voltage and continuity
• Flashlight or headlamp for visibility inside furnace compartment
• Small container or bag to hold fasteners and connectors during disassembly

Step-by-Step Instructions

Step 1: Isolate propane and electrical power

Turn off the propane supply at the tank valve. Switch off the furnace breaker on your 12V DC panel and disconnect the negative battery terminal. Wait five minutes to allow any residual gas to clear. This prevents accidental ignition during diagnosis and component removal. Do not skip this step—propane leaks and electrical shorts are serious hazards in an enclosed RV space.

Step 2: Access the furnace and photograph connections

Locate the furnace access panel on your Esteem (typically mounted in the basement or utility compartment). Remove the panel and take clear photos of the igniter wire harness connection and control board wiring before touching anything. Note the exact position of each connector. This photograph becomes your reassembly map and prevents reversed connections that will leave you without heat.

Step 3: Test the igniter for spark and continuity

Reconnect the battery negative terminal and furnace breaker. Set your multimeter to continuity mode and probe the igniter ceramic electrode and ground point—a good igniter shows continuity. Now turn on the furnace and listen for a clicking spark at the electrode while watching for visible spark. No spark and no continuity means the igniter has failed. No spark but continuity present suggests a control board failure instead.

Step 4: Disconnect and remove the failed igniter

Turn off power and propane again. Disconnect the igniter wire harness by gently pulling the connector straight away from the terminal block. The igniter probe slides straight out of the SF-35 combustion chamber with no fasteners—grasp it firmly and pull it straight toward you. Do not twist or force it; if it sticks, apply gentle rocking motions. Inspect the ceramic tip for cracks or discoloration, which confirm failure.

Step 5: Install the replacement igniter probe

Slide the new Suburban 232286 igniter straight into the SF-35 chamber until it seats flush against the burner assembly. The probe should slide smoothly with no forcing. Reconnect the wire harness to the control board terminal block, ensuring the connector clicks fully into place. Verify the wire routing does not contact the burner or any hot surfaces.

Step 6: Test the new igniter before closing up

Reconnect the battery and furnace breaker. Turn propane back on at the tank. Set the thermostat to heat and listen for the igniter click and spark at the electrode. You should hear rapid clicking and see a visible spark jumping to the burner. If spark is present and strong, the igniter replacement succeeded. If no spark appears, the control board is the actual failure point and requires replacement next.

Step 7: Verify heat output and seal the compartment

Allow the furnace to run for two minutes and feel warm air flowing from the heating vents. Check that the burner flame is steady and blue, not yellow or orange. Turn off the furnace and let it cool for five minutes. Reinstall the access panel and secure all fasteners. Your Esteem should now heat normally; if it does not, the control board replacement procedure follows the same isolation and testing sequence.