When your furnace stops producing heat in the middle of a cold winter night, a failed furnace ignitor is one of the most common culprits. This small but critical component is responsible for lighting the gas that heats your home. Without it, your furnace simply cannot start, no matter how hard it tries.
The good news is that furnace ignitor replacement is one of the more affordable HVAC repairs. Understanding how it works, what signs to watch for, and what it costs can help you act fast and avoid freezing nights or inflated repair bills. Whether you have a Goodman, Carrier, Lennox, or any other gas furnace brand, this guide covers everything you need to know.
What Is a Furnace Ignitor and How Does It Work?
A furnace ignitor is the component that starts the combustion process in a gas furnace. When your thermostat calls for heat, the control board sends an electrical signal to the ignitor. The ignitor heats up rapidly, reaching temperatures between 1,800 and 2,500 degrees Fahrenheit. Once it reaches that temperature, the gas valve opens and the gas ignites over the glowing element, producing the heat your system distributes through your home.
Modern gas furnaces use what is called a hot surface ignitor (HSI). This replaced the older standing pilot light design because it is more energy-efficient, safer, and more reliable. There are two main types of hot surface ignitors used today:
- Silicon carbide ignitors: The most common type. They glow bright orange when energized and have a larger surface area for better gas contact. They are slightly more fragile and prone to cracking over time.
- Silicon nitride ignitors: A newer and more durable design. They are used in many newer and high-efficiency models including current Goodman furnace lineups. They tend to last longer but may cost slightly more to replace.
Signs Your Furnace Ignitor Needs Replacement
A failing furnace ignitor often gives warning signs before it quits completely. Knowing what to look for helps you act before you are left without heat.
Furnace Starts but Does Not Produce Heat
You may hear the blower motor running and feel air coming through the vents, but the air stays cold. This usually means the ignitor is not lighting the gas, so the furnace runs a cycle without ever producing heat.
Repeated Clicking or Failed Ignition Attempts
If your furnace clicks multiple times and then shuts off without igniting, the system is attempting to fire but failing. One click is normal during startup. Repeated clicking followed by silence is a sign the ignitor is struggling or has failed.
Intermittent Heating
The furnace works sometimes and fails other times. This on-and-off behavior is a classic sign of a degrading ignitor that is losing its ability to reach proper ignition temperature consistently.
Error Codes on the Control Board
Most modern furnaces display LED flash codes on the control board to indicate specific faults. An ignition failure code is one of the most common. Check your furnace manual to decode the blinking pattern.
Visible Cracks or Damage
If you inspect the ignitor with the power off and see white oxidation marks, cracks, or burned areas on the ceramic element, replacement is necessary. A cracked ignitor cannot be repaired and must be swapped out.
How Long Does a Furnace Ignitor Last?
A standard hot surface ignitor typically lasts between 3 and 5 years. Silicon nitride models can last longer under good conditions. Several factors affect lifespan:
- Dust and debris buildup on or around the ignitor causes it to overheat and fail early.
- A clogged air filter restricts airflow and forces the furnace to work harder, putting extra strain on the ignitor.
- Frequent short cycling, where the furnace turns on and off rapidly, wears out the ignitor faster.
- Location matters too. A furnace placed in a laundry room or dusty basement faces more contamination risk.
Routine furnace maintenance, including filter changes every 1 to 3 months and annual professional tune-ups, can meaningfully extend ignitor life.
Furnace Ignitor Replacement Cost
Furnace ignitor replacement cost in the United States varies depending on part type, brand, labor rates, and timing. Here is a breakdown of what you can expect to pay:
| Repair Type | Parts Cost | Labor Cost | Total Cost |
| Universal Ignitor (DIY) | $15 – $35 | $0 | $15 – $35 |
| Universal Ignitor (Pro) | $15 – $35 | $80 – $150 | $100 – $185 |
| OEM / Brand-Specific Part (Pro) | $40 – $100 | $80 – $200 | $150 – $300 |
| Goodman Ignitor Replacement (Pro) | $30 – $80 | $80 – $150 | $110 – $230 |
| Emergency / After-Hours Repair | $40 – $100 | $140 – $210/hr | $300 – $600 |
Most homeowners pay between $100 and $300 for a professional furnace ignitor replacement including parts and labor. Emergency or after-hours repairs can push costs toward $400 to $600 depending on your location and service provider. The part alone typically runs $15 to $100, while labor ranges from $80 to $200.
What Affects the Cost?
- Ignitor type: Universal parts cost less than original equipment manufacturer (OEM) parts specific to your furnace brand.
- Brand: A Goodman furnace ignitor replacement may differ in cost from a Carrier or Lennox model due to part availability.
- Location: Labor rates in metropolitan areas are typically higher than in rural regions.
- Timing: Weekday business hours are cheapest. Weekends and holidays carry premium emergency rates.
- Furnace accessibility: A furnace in a tight crawl space or attic takes longer to service and costs more.
How to Replace a Furnace Ignitor
For homeowners comfortable with basic tools, furnace ignitor replacement is considered one of the more approachable DIY furnace repairs. That said, furnaces involve natural gas and high-voltage electricity, so safety must come first.
What You Will Need
- Replacement ignitor compatible with your furnace model number
- Quarter-inch nut driver or screwdriver
- Work gloves and safety glasses
- Multimeter (optional, for testing)
Step-by-Step Replacement Process
Step 1. Turn off the gas supply and shut off power to the furnace at the breaker or disconnect switch.
Step 2. Allow the furnace to cool completely before opening any panels.
Step 3. Remove the front access panel to expose the burner assembly.
Step 4. Locate the ignitor near the burner. It is a small rod or stick-shaped ceramic component.
Step 5. Disconnect the wiring connector. Pull from the connector housing, not the wires themselves.
Step 6. Remove the mounting screws with a nut driver and carefully slide the ignitor out. Avoid touching the ceramic heating element with bare hands, as skin oils can cause premature failure.
Step 7. Inspect the old ignitor for visible cracks, white oxidation spots, or burn marks.
Step 8. Install the new ignitor in the same position and orientation. Secure the mounting screws and reconnect the wiring.
Step 9. Restore power and gas, then set the thermostat to call for heat. Watch for the ignitor to glow and the burners to light within 30 to 60 seconds.
Step 10. If the furnace ignites normally and produces warm air, the repair is successful. Reinstall the access panel.
Important: If the furnace still does not ignite after installing a new ignitor, the issue may involve the gas valve, control board, flame sensor, or another component. At that point, contact a licensed HVAC technician.
Goodman Furnace Ignitor Replacement
Goodman is one of the most common furnace brands found in American homes. Current Goodman furnace models use silicon nitride hot surface ignitors, which offer better durability compared to older silicon carbide designs. The OEM replacement part for many Goodman models is the Goodman 0130F00008S ignitor.
When replacing a Goodman furnace ignitor, always match the part to your specific model number found on the furnace label. Using a universal ignitor is possible in some cases, but OEM parts ensure proper fit, electrical compatibility, and long-term reliability. Avoid touching the ceramic element with bare hands during installation.
DIY vs. Professional Furnace Ignitor Replacement
Replacing a furnace ignitor yourself can save $80 to $200 in labor costs. The part is inexpensive and the job takes an experienced technician about 30 to 60 minutes. However, there are good reasons to call a professional:
- Gas and electrical safety: Any mistake with gas connections or electrical components can lead to leaks, fires, or carbon monoxide risks.
- Diagnosis accuracy: A technician can confirm the ignitor is actually the cause, not the flame sensor, gas valve, or control board.
- Warranty: Professional repairs often come with a labor warranty, protecting you if the issue returns.
- Difficult access: Furnaces in tight spaces or unusual configurations are harder to service safely without proper training.
If you are comfortable with basic tools and follow safety steps carefully, a straightforward ignitor swap is a reasonable DIY project. When in doubt, calling a licensed HVAC professional is the safer choice.
How Top Tech Mechanical Can Help
At Top Tech Mechanical, we specialize in fast, reliable furnace repairs including gas furnace ignitor replacement across the area. Our certified HVAC technicians accurately diagnose the problem before replacing any parts, ensuring you pay only for what your furnace actually needs. We use quality OEM and compatible replacement parts and back our work with a labor warranty.
Whether your furnace is not igniting, blowing cold air, or showing error codes, our team is ready to restore your heat quickly and safely. Contact Top Tech Mechanical today to schedule a same-day or next-day diagnostic appointment.
Conclusion
A failed furnace ignitor is one of the most common reasons a furnace stops producing heat, but it is also one of the most affordable repairs. Recognizing the warning signs early, knowing the typical furnace ignitor replacement cost, and understanding your repair options puts you in control when your heating system fails.
Key takeaways from this guide:
- A furnace ignitor heats up to 1,800 to 2,500 degrees Fahrenheit to light the gas burners in a gas furnace.
- Signs of failure include cold air from running furnace, repeated failed ignition attempts, and visible cracks on the ignitor.
- Typical replacement cost runs between $100 and $300 for parts and professional labor.
- Goodman furnace ignitor replacement uses silicon nitride parts for improved durability in current models.
- DIY replacement is feasible for handy homeowners, but professional service is recommended when gas or electrical safety is a concern.
Frequently Asked Questions
How do I know if my furnace ignitor is bad?
The most common signs are a furnace that runs but blows only cold air, repeated failed ignition attempts, intermittent heating, and error codes on the control board. You can also visually inspect the ignitor for cracks or burned areas with the power off.
What is the average furnace ignitor replacement cost?
Most homeowners in the United States pay between $100 and $300 for a professional gas furnace ignitor replacement including parts and labor. The ignitor part alone costs $15 to $100. Emergency repairs after hours can cost $300 to $600.
Can I replace a furnace ignitor myself?
Yes, a furnace ignitor replacement is considered one of the more DIY-friendly furnace repairs. You need the correct replacement part, a nut driver, and basic safety precautions including turning off gas and power before starting. If the furnace still does not ignite after replacement, contact a professional.
How long does a furnace ignitor last?
A standard hot surface ignitor lasts 3 to 5 years on average. Silicon nitride ignitors, found in newer models including current Goodman furnaces, can last longer. Regular filter changes and annual maintenance help extend ignitor lifespan.
What is the Goodman furnace ignitor replacement part number?
Many current Goodman furnace models use the OEM part number 0130F00008S. Always verify compatibility using your specific furnace model number found on the rating label inside the cabinet before purchasing any replacement part.
