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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:
Apr 28, 2022
I left a live chat message on their website that my air conditioning was not working. Within 1hr a representative called me to discuss my options.
The next day he came to the house to review my needs and give me a price for a new system. Price quoted was less than I expected and the installation was completed the following day. I found their salesman and the installers very knowledgeable and easy to deal with. All my questions were answered. Everything was properly explained in regards to what unit was needed and why, along with instruction where needed for use.
The installers made sure everything was working properly before they left.
Apr 28, 2022
This is to thank Twintech Heating and Cooling for their exceptional and timely service. Mitch, their technician was very courteous and generous with his time right from his first meeting with us. He not only took the time to check everything but also educated us on why we needed what he recommended. Greg and Mitch graciously accommodated us on our requested day and time for job to be done. They were both very courteous and responsive to our needs and special requests especially in a tight spot. The job was finished neatly and on time. Thank you Twintech for your great service !
Apr 28, 2022
They came the day and time they had planned for us and were very fast and efficient! The AC works amazing and it is amazing during the heat of the summer we have already got! Thanks for everything you did for us!
Apr 28, 2022
Would recommend this company to friends and family in a heartbeat. Very professional , on time and left no mess when the job was done.
Apr 28, 2022
Great customer service. Responsive and professional. I would highly recommend Twintech, I used them previously for repair service and a new air conditioner- very satisfied.
Apr 5, 2022
Our air conditioner failed. Made a call and within 15 min a technician was at our door.
The issue was fixed and many suggestions were provided.
Thanks to Mitch. Great service !
Apr 5, 2022
Our furnace was rattling, as soon as we put our air conditioner on this past week. We had researched looking for a company that was Registered with Better Business Bureau, and this company TwinTech, had A+ Rating. Scott, was immediately helpful via text/phone and sent his technician as soon as he was able...Mitchell/technician provided great professional service. Thank you TwinTech.
Sean and Debbie
Apr 5, 2022
I contacted various companies when looking to install a new furnace and I found Twintech to be transparent with their communication and approach. They had options to suit my various requirements and the price vs quality was very good. The after installation communication was also very good and they answered all queries I had.
Apr 5, 2022
My furnace broke down last month. The team was quick to respond, courteous, professional and mindful of COVID-19 concerns. I highly recommend them if you are considering replacing or servicing your HVAC equipment.
Apr 5, 2022
I was very happy with the installation and price. I would definitely recommend. Thank you Twintech.
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