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Ignition Issues With Your Furnace
Posted On: October 11, 2024
If your furnace isn’t turning on or staying lit, it may be experiencing ignition problems. Ignition issues can be frustrating, especially during colder months when you rely on your heating system to function properly. Understanding the possible causes can help you identify and solve the problem before calling in a professional. Here's a guide to common furnace ignition issues and potential solutions.
Common Causes of Furnace Ignition Problems
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Pilot Light Issues: Older furnaces typically use a pilot light for ignition. If the pilot light is out, the furnace won’t ignite. This can be due to a draft, a dirty pilot light, or a malfunctioning thermocouple.
Solution: If the pilot light is out, try relighting it according to the manufacturer’s instructions. If it won’t stay lit, check for drafts or clean the pilot light assembly. You may also need to replace the thermocouple, which detects whether the pilot light is on.
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Faulty Ignition Sensor: For newer furnaces with electronic ignition, the ignition sensor can sometimes malfunction. Over time, dirt and grime can accumulate on the sensor, causing it to fail in detecting the flame.
Solution: Cleaning the ignition sensor often resolves this issue. Turn off the furnace, remove the sensor, clean it with fine sandpaper or a brush, and reinstall it.
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Ignitor Failure: Furnaces equipped with hot surface ignitors rely on a small electrical component to create heat for ignition. If the ignitor fails, the furnace won’t start.
Solution: Ignitors can wear out over time, and a replacement is usually necessary. This part is fragile, so it's best to have a professional technician handle the replacement.
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Gas Supply Issues: If your furnace isn't getting enough gas, it won’t ignite. This could be due to a closed gas valve, low gas pressure, or an issue with the gas line.
Solution: Ensure that the gas valve is open and check your home's gas supply. If the issue persists, contact your gas company or a technician to inspect the gas lines.
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Dirty Burners: Over time, the burners in your furnace can become clogged with dust and debris. Dirty burners can prevent proper ignition and cause the furnace to operate inefficiently.
Solution: Cleaning the burners can restore normal operation. This task is often best left to a professional, as improper cleaning can damage the components.
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Blocked Air Intake or Exhaust: Modern furnaces have a safety feature that prevents ignition if the air intake or exhaust vent is blocked. This is a safety precaution to avoid dangerous gases from building up.
Solution: Check that the vents are clear of obstructions like leaves, snow, or debris. Clearing these blockages should allow the furnace to ignite properly.
When to Call a Professional
While some furnace ignition issues can be resolved with basic troubleshooting, others require the expertise of an HVAC professional. If you're unsure or uncomfortable handling any components, it's best to contact a certified technician to ensure safety and proper repairs. Regular maintenance can also help prevent ignition problems, keeping your furnace running smoothly throughout the winter.
By addressing furnace ignition issues early, you can avoid more significant problems and ensure your home stays warm and comfortable.
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See What Our Customers Are Saying:
Aug 23, 2022
It was a refreshing experience interacting with the Twintech team. From Bob, the sales consultant, who articulated in layman's terms all the options available and reasons for making any selection. This was done without the prevailing pressure tactics so commonplace today.
Before proceeding Mitch, the technician, at our request conducted a service check on our 30 yr old furnace. His report was positive indicating no urgency to replace it. Again no pressure tactics.
Three days after first meeting with Bob, the installation team of Greg and
Spencer completed the installation within the planned time frame.
A very professional, courteous and transparent team which delivered on their promise. I highly recommend Twintech.
Aug 22, 2022
Initial contact with sales resulted in an immediate response, which led to a timely installation. Both sales and installers were all very professional. I have no hesitation in recommending TWINTECH.
Aug 21, 2022
I had a great experience with TwinTech. The company offered a reasonable quote, and performed a quick and clean installation. The installer Greg was experienced, professional and courteous. He explained the services he performed and gave recommendations on maintain the new furnace.
The salesman Bob was honest
and professional and educated me on how to achieve optimal performance.
All communication from them was quick and they came the following day. I was pleased with the service and would recommend them.
Aug 20, 2022
From quote, to installation, to follow up, Twintech provided excellent service. I would highly recommended their services.
Aug 19, 2022
I had a really great experience with these guys. The salesman Bob was clearly very knowledgeable about everything to do with heating and cooling a home, spent a lot of time with us going over the details of the job, never rushed us and came back after the install to make sure we were happy. The installation crew was excellent, they covered the floors all the way from outside down to the basement furnace room, kept the place clean, got the work done on time and were very friendly. Ive got 15 years in the contracting/ construction industry and these guys are one of the most professional companys Ive dealt with. Great company!
Aug 18, 2022
Had great service and clean-up was good. Was happy with my salesman. They were very friendly and helpful. I needed a new furnace as our was over 20 years old. The furnace and air-conditioner work great and they are very quiet. I am very pleased with the service and product I received.
Aug 17, 2022
Met with Dave for the sales process and he was great about explaining and going over everything to us. The install happened very quickly and the team were super professional and friendly. We are very happy with this company and their services and we definitely recommend them to others. Thankful my sister recommended them to me!
Aug 16, 2022
Reviews for Twintech were good, and they did not disappoint. After an initial visit to discuss the suitable AC unit for replacement, an installation date was available in just a couple of days, and everything was installed without a hitch. Highly recommended
Aug 16, 2022
Very pleased with the installation of our new furnace and A/C unit. From quotation stage to the completion of the job Twintech was very professional.
Thank you for a job well done.
Aug 15, 2022
My old water heater quit on me. I called TwinTech. In less than 4 days, I had my new water heater installed and the old one taken away. The whole process was quick, easy, pleasant, and well done. This is the third time I've dealt with TwinTech and I've been satisfied each time.
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