Furnace Ignitor Replacement: Cost, Signs & Same-Day Repair
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- Furnace Ignitor Replacement: Cost, Signs & Same-Day Repair
Why won't my furnace ignite?
A hot surface ignitor is the glowing element that lights your furnace’s gas. When it cracks or burns out, the furnace clicks and tries to start but never produces flame, the classic “won’t ignite” failure, and the single most common furnace repair. Replacement in Columbus typically costs $150 to $300 installed. Call Columbus Furnace Repair at our 24/7 emergency line for same-day service.
What is a hot surface ignitor and how does it fail?
A hot surface ignitor is a small ceramic element, usually a silicon carbide or silicon nitride “stick” or flat plate, a few inches long, that works like the element in a toaster. The control board sends it 120 volts, it heats to roughly 1,800 to 2,500°F until it glows bright orange, and the gas ignites on contact with that superheated surface. No standing pilot light, no open flame sitting there all season, which is why nearly every modern gas furnace uses one.
It fails for a simple reason: thermal stress. Every heating cycle heats the element to glowing and cools it back down. After thousands of cycles, typically 3 to 7 years, the ceramic develops hairline cracks, resistance drifts out of range, and one cold morning it simply doesn’t light. Failure accelerates when:
- The ignitor gets touched or bumped. Skin oils on a hot surface ignitor create hot spots that crack it. This is the #1 DIY and cleaning-accident killer.
- Short cycling multiplies on-off cycles, wearing the element two or three times faster than normal runs. Furnace Keeps Shutting Off
- Airflow problems from clogged filters overheat the burner compartment.
- Age alone, ignitors are wear parts, like brake pads. Needing one at year six is normal, not a defective furnace.
[MID-PAGE BOX: “Furnace clicking, glowing weakly, or not lighting at all in Columbus? Ignitor replacement is usually done within the hour once diagnosed. Call our 24/7 emergency line.”]
How much does furnace ignitor replacement cost?
| Cost | |
|---|---|
| Ignitor part alone (retail, if you buy it yourself) | $25 to $75 |
| Professional replacement, parts & labor | $150 to $300 |
| Diagnostic visit (usually rolled into the repair) | $75 to $150 |
(Installed ranges per published HVAC cost data.)
For context, the average furnace repair in Columbus is $304, with most repairs between $123 and $505 (Angi), an ignitor replacement typically lands below that average, making it one of the cheapest common furnace fixes. Why the gap between the $25 to $75 part and the $150 to $300 installed price? You’re paying for the diagnosis (confirming the ignitor, not the board or gas valve, is the real fault), the correct model-matched part, the labor, and the verification that the furnace lights and runs safely afterward. A wrong-guess part swap on a gas appliance gets expensive fast.
You’ll approve the exact quote before work starts. Full Columbus furnace repair cost guide, part by part.
[CTA BOX: “Same-day ignitor replacement across Columbus and the suburbs. Columbus Furnace Repair: our 24/7 emergency line.”]
Can I replace a furnace ignitor myself?
Honestly? A careful, handy homeowner can, it’s one or two screws and a wire connector, and the part is cheap. Here’s the honest other half: hot surface ignitors are among the most fragile parts in any appliance you own. The ceramic cracks if you knock it against the burner housing, squeeze it, or touch the element surface with bare fingers, and a cracked replacement fails immediately or within weeks, leaving you to buy a second one. Furnace manufacturers and techs handle ignitors by their ceramic base only, like a halogen bulb.
There’s also the diagnosis trap: the ignitor that “must be bad” sometimes isn’t. If the control board isn’t sending voltage, a brand-new ignitor won’t light either, and now you’ve spent $50 and an evening to learn the fault was elsewhere. And any time you’re working inside a gas appliance, the safety rules apply: power off at the switch and breaker, gas stays respected, and if you smell gas, stop and call instead.
The practical math: professional replacement is $150 to $300 total, usually completed within an hour of arrival, with the diagnosis confirmed first. If your furnace is down in a Columbus January (overnight lows around 22°F), most homeowners decide the sure, fast fix beats the fragile DIY one. Call our 24/7 emergency line and tell us the symptom, “clicks, glows, no flame” gets you the right part on the truck.
- Full diagnostic first, ignition, flame sense, airflow, safeties, and gas pressure tested before anything is recommended.
- One flat price, approved by you, work starts only after you say yes.
- Most repairs done the same visit, common parts are standard truck stock.
- Safety checks included, heat-exchanger and carbon-monoxide checks on every repair.
- Plain-language walkthrough, what failed, why it failed, and how to keep it from failing again.
Why does my ignitor keep burning out?
One ignitor every 3 to 7 years is normal wear. Two in two years is a symptom, something in the furnace is killing them, and replacing the part without fixing the cause just schedules the next failure:
- Short cycling. A furnace that starts and stops every few minutes multiplies ignitor heat-cool cycles, the direct wear mechanism. Short cycling itself has causes (oversized system, clogged filter, failing limit switch) that need their own diagnosis. Furnace Keeps Shutting Off
- Restricted airflow / overheating. A matted filter or blocked returns overheats the burner compartment, baking the ignitor beyond its design temperature.
- Handling damage. A past DIY or rushed repair where the element was touched or nicked can quietly shorten the new ignitor’s life.
- Voltage or board problems. A control board sending dirty or excessive voltage ages ignitors early, this is the “keeps failing” pattern a technician’s multimeter catches in minutes.
- Contamination. Construction dust, drywall dust, or cleaning chemicals drawn into the burner compartment coat and degrade the element.
When you call Columbus Furnace Repair for a repeat failure, the technician checks cycling pattern, airflow, and board voltage, not just the ignitor. Fixing the cause costs less than a third ignitor. A tune-up catches most of these early.
How long does ignitor replacement take?
Once the diagnosis confirms the ignitor, the swap itself takes about 20 to 45 minutes: power down, access the burner compartment, unplug and unmount the old element, mount the new one (handled by the base, never the element), reconnect, and run a full test cycle to confirm strong ignition and sustained flame. Most visits run about an hour door-to-door including diagnosis.
Timing matters in winter: an ignitor failure means zero heat, not reduced heat. In Columbus, with January averaging 29.6°F and nights near 22°F, that’s an emergency-priority call, a cold house risks frozen pipes within a day or two of a hard freeze. Technicians carry common ignitor models on the truck (they’re brand- and furnace-specific, so mention your furnace brand when you call), and same-day replacement is the norm. For after-hours failures, 24/7 emergency furnace repair in Columbus.
Furnace clicking but never lighting? That’s most likely a $150 to $300 repair, not a new furnace. Columbus Furnace Repair diagnoses it today, replaces the ignitor on the spot, and confirms safe operation before leaving.
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Frequently Asked Questions
How do I know if my furnace ignitor is bad?
The classic signs: the furnace starts its startup sequence (you hear the inducer motor), but the burners never light; you hear clicking with no ignition; or you watch through the sight glass and see no orange glow where the ignitor should heat up. A visible crack in the ceramic element is confirmation. If it glows but weakly and the gas never lights, it’s failing too.
How much does it cost to replace a furnace ignitor?
Professionally replaced, part and labor, typically $150 to $300 in Columbus (published HVAC cost data). The part alone retails for $25 to $75, but it’s fragile, model-specific, and easy to crack during installation. For scale, the average Columbus furnace repair is $304 (Angi), so ignitor replacement is among the cheaper fixes. Call our 24/7 emergency line for an exact quote after diagnosis.
What's the difference between a bad ignitor and a bad flame sensor?
An ignitor creates the flame; a flame sensor verifies it. Bad ignitor: burners never light at all, clicking, maybe a glow, no flame. Bad flame sensor: burners light fine, then shut off within a few seconds because the control board can’t confirm the flame. Flame sensor cleaning guide.
Why won't my gas heater ignite?
Most often, the hot surface ignitor has cracked or burned out, it’s the #1 cause. Other possibilities: the gas valve isn’t opening, the control board isn’t sending power to the ignitor, or (on older units) a pilot/thermocouple problem. The startup sequence tells the story: no glow points at the ignitor or board; glow with no flame points at the ignitor’s strength or the gas side. A technician pinpoints it with a meter in minutes.
What does a furnace safety lockout mean?
If ignition fails repeatedly, typically three attempts, the control board locks the furnace out for safety rather than letting unburned gas keep flowing on each retry. Lockout is the board protecting you, and it’s a symptom, not the disease: a dead ignitor is the most common trigger. Clear the underlying fault (often the ignitor) and the lockout clears with it. If your furnace keeps locking out, don’t keep resetting it, call our 24/7 emergency line.
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