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Why Does My Furnace Need So Many Repairs?
Posted On: March 21, 2025
If your furnace keeps needing repairs, it’s a sign that something deeper might be going on. Here are the most common reasons:
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Lack of Regular Maintenance
Just like a car, your furnace needs routine checkups. Skipping annual inspections or filter changes can lead to dirt buildup, worn-out parts, and poor efficiency — all of which cause breakdowns.
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Old Age
Furnaces typically last 15-20 years. If yours is nearing that range, parts start wearing out more frequently, leading to repeated repairs.
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Improper Sizing or Installation
A furnace that's too small works overtime, and one that's too large cycles on and off too quickly. Both scenarios cause extra wear and tear on components.
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Clogged or Dirty Filters
A dirty filter restricts airflow, making your furnace work harder. This strain can cause overheating, blower motor failure, or even a cracked heat exchanger.
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Thermostat Issues
A malfunctioning thermostat can cause short cycling or make the furnace run longer than necessary, putting extra stress on the system.
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Wear and Tear on Components
Blower motors, belts, bearings, and igniters naturally wear out over time. If multiple parts start failing, it may be more cost-effective to consider replacement.
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Electrical Issues
Frequent on/off cycling or power surges can damage electrical components, leading to ignition problems, pilot light failures, or motor malfunctions.
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Airflow Problems
Blocked vents, leaky ductwork, or even an improperly balanced system can cause uneven heating, making the furnace work harder than it should.
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Pilot Light or Ignition Problems
Modern furnaces often use electronic ignition, which can fail due to sensor issues, dirt, or electrical problems.
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Manufacturer Defects
Rare, but possible — some furnaces come with faulty parts or poor design that causes repeated failures.
When Should You Consider Replacing It?
If your furnace is over 15 years old, and repairs are becoming frequent and costly (especially major parts like heat exchangers or blowers), a replacement might save you money in the long run — plus, newer models are more energy-efficient.
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See What Our Customers Are Saying:
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.
Aug 14, 2022
I had them replace my furnace last year. When it came time for the air conditioner this year, I did not hesitate to call Twintech again. I will also have them perform regular maintenance on them.
Aug 13, 2022
We required a new HVAC replacement after running the old
system for 18 years.
Dave understood our requirements and gave us a quote that
covered all the necessary items.
Installation was fast and very tidy. Everything works as
it should. Our thanks to Greg, Mitch and others for their
excellent work. Recommend this family owned business to
anyone else, considering HVAC or other work.
Aug 12, 2022
I needed a new furnace and A/C to replace my 21 yr. old units, and went to the internet to view potential companies in May, I received 3 quotes,
and chose Twintech based on their salesman Dave who was very detailed and covered off everything on what Twintech was all about,
an extremely dedicated company with so many years of experience, and after reading the on line reviews I was sold on Twintech, who did not disappoint as the installation team were top notch with Greg leading,
I would highly recommend this company without any doubts, in my books they are first class all the way. Our new Amana furnace and A/C are working perfectly !
Aug 11, 2022
Flawless transaction. They did exactly what they promised, showed-up on time, cleaned-up, and were highly professional. Highly recommended.
Aug 10, 2022
Salesperson and 2 man installation team were all professional and
knew their stuff. All three were friendly and helpful, answering all
my questions. The quality of their work demonstrated their experience
and expertise in their field.
Aug 9, 2022
A dear late cousin of mine recommended this company and I have been happy with the service.
Aug 8, 2022
We are very pleased with the work done by Twintech. They were very professional from start to finish. Dave came to our home and gave us a very competitive quote for new high efficiency furnace and air conditioner. The installers were very courteous and professional. We would highly recommend them.
Aug 7, 2022
Great experience getting an old furnace replaced.
Sales Guy (Dave) was great - honest, responsive, and friendly.
The work itself was done quickly and we are very happy with the outcome, thank you! We recommend TwinTech!
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