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Understanding Your Furnace Ignitor

Common Issues and Solutions of a Furnace Ignitor

A properly functioning furnace ignitor is crucial for keeping your home warm during the colder months. If your furnace isn’t igniting, it could be due to a faulty ignitor, which is a common issue in many heating systems. Understanding how your ignitor works, recognizing the signs of failure, and knowing when to seek professional repairs can help you avoid unexpected heating problems.

What is a Furnace Ignitor?

The furnace ignitor is a critical component in modern gas furnaces, responsible for igniting the gas burner. Unlike older pilot light systems, most newer furnaces use either a hot surface ignitor (HSI) or an intermittent pilot ignitor to start the heating process. When the ignitor fails, the furnace won’t produce heat, leading to discomfort and potential safety concerns.

Signs of a Failing Furnace Ignitor

If your furnace is not heating properly, you might be dealing with a bad ignitor. Here are some common signs:

  • Furnace not igniting – If your furnace clicks but doesn’t turn on, the ignitor might not be working.
  • Frequent cycling – A failing ignitor can cause the furnace to turn on and off frequently.
  • No glow from the ignitor – A working ignitor should glow orange when heating up.
  • Cool air blowing from vents – If your furnace is running but only blowing cold air, it could be an ignitor issue.
  • Error codes on the furnace control board – Many furnaces display error codes indicating an ignitor problem.

What Causes a Furnace Ignitor to Fail?

There are several reasons why your furnace ignitor may stop working:

  • Age and wear – Ignitors typically last 3-7 years before wearing out.
  • Electrical surges – Power fluctuations can damage the ignitor.
  • Dirt and debris buildup – A dirty ignitor can fail to heat properly.
  • Incorrect handling – Touching the ignitor with bare hands can leave oils that shorten its lifespan.
  • Faulty limit switch or thermostat – These components can prevent the ignitor from receiving power.

How to Fix a Furnace Ignitor

If your furnace isn’t igniting, try these troubleshooting steps before calling a professional:

  1. Check the power supply – Ensure the furnace is receiving power.
  2. Inspect the ignitor – Look for visible cracks or damage.
  3. Reset the furnace – Turn off the power, wait a few minutes, then turn it back on.
  4. Test the thermostat – Make sure it’s set to heat mode and at the right temperature.
  5. Check for error codes – Refer to your furnace manual for troubleshooting specific codes.

If your furnace ignitor is still not working, it’s best to contact a professional HVAC technician. At Arctic Air, we specialize in furnace repair in Palmdale, Lancaster, Quartz Hill, Rosamond, Acton, and Tehachapi, ensuring your heating system runs efficiently.

Preventing Furnace Ignitor Failure

Regular furnace maintenance can help extend the lifespan of your ignitor and prevent unexpected breakdowns. Here are some tips:

  • Schedule annual furnace tune-ups to inspect and clean the ignitor.
  • Keep your air filters clean to prevent dust buildup.
  • Ensure your thermostat and wiring are in good condition.
  • Avoid touching the ignitor when handling furnace components.

Professional Furnace Repair and Replacement

If your furnace ignitor has failed, Arctic Air provides fast and reliable repairs in Palmdale, Quartz Hill, Rosamond, Acton, Tehachapi, Littlerock, and Mojave. Our expert technicians can diagnose and fix ignitor issues, ensuring your furnace operates safely and efficiently. Don’t let a faulty ignitor leave you in the cold—schedule a service today!

FAQs

Can I replace a furnace ignitor myself?

While it’s possible, furnace ignitors are delicate and can easily break if handled improperly. A mistake could also lead to further system damage or a gas leak. If you’re not experienced with furnace repairs, professional replacement is the safest option.

How much does it cost to replace a furnace ignitor?

The cost varies depending on the model and labor fees. The part itself typically costs $30 to $100, while professional replacement can range from $150 to $300.

How do you reset the ignitor on a furnace?

To reset the ignitor:

  1. Turn off the furnace power switch and wait a few minutes.
  2. Locate the reset button near the burner assembly.
  3. Press and hold it for 30 seconds, then release.
  4. Restore power and check if the furnace ignites.

If the furnace still won’t start, the ignitor may be faulty and need replacement.

How long does it take to replace a furnace ignitor?

Most replacements take 30 to 60 minutes, but if there are additional issues—like a faulty control board or gas valve—it could take longer.

Can I clean my furnace ignitor?

Yes, but do so carefully. Use a soft brush or compressed air to remove dust buildup. If the ignitor is cracked or worn out, cleaning won’t fix the issue, and it will need to be replaced.