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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:
Jan 4, 2023
Once again Twin Tech came through and fixed my furnace. A young man by the name of Mitch came by tonight and he was so nice explained everything he was quick he was clean he turned off the lights even when he left the furnace room its just above and beyond Twin Tech always delivers and I just found out about them last year and I will use no one else but thanks again Mitch you are fantastic
Jan 4, 2023
I had a problem with the Furnace (Armstrong ultra V) and Greg diagnosed it on the phone. Even told me what the issue was and I was able to fix it. This level of service from a Business that is almost unknown today.
If you require service, reach out to Greg. I will definitely use them in the future!
Jan 4, 2023
We have been shopping for a heat pump for our home. We had 3 reps come in and make recommendations and provide a quote. Of the 3, Bob was so clearly so much more qualified, thorough and informed than the other two that the decision was a no brainer. As soon as we get our audit results Twintech will be installing our heat pump.
Jan 4, 2023
knowledgeable sales person, did not try to up-sell unneeded features,
and was easily contacted to ensure customer satisfaction.
Installation was expertly done by friendly guys, everything explained for use of the products. Old products were removed and returned to rental company as part of the service. Follow up call was received to check all was well. This is my second time using this company as I was fully satisfied with my previous air conditioning unit installation
Jan 4, 2023
Twintech recently installed a new furnace for me. Bob did a great job assessing what I had and needed. All details well explained including the importance of proper sizing of furnace and the value of multi stage heating and the variable speed blower. As a nurse, indoor air quality is a high priority so the variable speed motor running continuous is so good. 24/7 air cleaning. Greg did a great job on install, attention to detail so appreciated. Already notice such an improved comfort and heat. Thank you Twintech! You come as advertised. I will recommend to anyone in need of heating or cooling!
Jan 4, 2023
We received various quotes from 4 different companies and right away, the prompt and thorough communication from Bob from TwinTech stood out. He introduced himself, sent sample sites and information, and always confirmed any agreed to dates and times.
Bob was friendly and extremely knowledgeable about the topic of HVAC and it was clear he was passionate about his profession. He approached the job as if he was installing in his own home.
Prior to the new furnace & A/C installation, our old units were loud and inefficient - having several rooms feeling too cold in the winter and too hot in the summer. After installing the recommended units, all rooms stay at a consistent temperature- even the finished basement.
I highly recommend the TwinTech team - just an outstanding job at a reasonable price point.
Jan 4, 2023
The experience with Twintech was great from the start. Bob the sales manager was friendly and professional and did not use any pressure tactics. He was very knowledgeable.
The installation was completed by the twin owners in about 6-7 hours. Clean quiet easy going didn't mind when I poked my head in to see progress. Highly recommend
Sep 8, 2022
Just choose Twintech!
I do not usually write reviews and should have done this a few days sooner. But I was and still am enjoying the increased comfort in my home from the new furnace installed by Twintech.
From my initial call and conversation with Bob, I already had a good feeling that I would like this company.
I was provided information, pictures of great quality work previously completed.
When Bob came for the inspection of the furnace he was amazing. He gave so much great advice and told me all the areas that his team would resolve. I was very impressed as some of what he had suggested I had only seen in Youtube videos. The honesty and options for payment made this a no brainer. I decided I would like Twintech to replace my furnace.
The work was scheduled promptly week and took place within half a day. Gregg came to install the new furnace. Again amazing they carried out all the work promised. What was left was the best I have seen and speaks to how they take pride in the work they do and deliver. Gregg was really polite and professional and the furnace in my basement is a work of art.
Sep 7, 2022
They were friendly, fast, clean, & answered any questions I had. They are also offering an interest free 12 month payment plan - that really helped me out since this was an unexpected expense.
Sep 6, 2022
I had Twintech heating install a new furnace and ac unit. Bob, the sales rep, the installation team of Greg and Mitch were a 10 across the board. They were never pushy, gave me time to think about it. Once we decided , they were there in 24hrs. Great company to deal with. And they were nearly 5k less than a competitors quote for a top of the line furnace/ac unit verse mid level.
I highly recommend Twintech heating to anyone interested in anything HVAC.
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