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Furnace: What Does Short Cycling Mean?
Posted On: December 30, 2024
Short cycling is a term used to describe a situation where your furnace turns on and off repeatedly without completing a full heating cycle. This inefficient operation not only compromises the comfort of your home but can also lead to higher energy bills and unnecessary wear and tear on your furnace.
Common Causes of Furnace Short Cycling:
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Dirty Air Filters
A clogged air filter restricts airflow, causing the furnace to overheat and shut down as a safety precaution. Replacing the air filter regularly can prevent this issue.
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Thermostat Issues
If your thermostat is located in an area that heats up quickly, such as near a heat source or in direct sunlight, it can signal the furnace to shut off prematurely. Incorrect thermostat settings or malfunctions can also cause short cycling.
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Oversized Furnace
A furnace that’s too large for your home will heat the space quickly and then shut off, only to restart when the temperature drops. This constant on-and-off cycle is inefficient and can reduce the lifespan of your furnace.
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Blocked Vents or Ductwork
Obstructions in your ductwork or closed vents can disrupt proper airflow, leading to overheating and short cycling.
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Faulty Flame Sensor
A dirty or malfunctioning flame sensor can cause the furnace to shut down as it fails to detect the burner flame. Cleaning or replacing the flame sensor can resolve the issue.
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Low Airflow
Problems with the blower motor, fan, or other components affecting airflow can lead to short cycling. Insufficient airflow causes the furnace to overheat and shut off prematurely.
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Improper Gas Pressure
Incorrect gas pressure can affect the furnace’s combustion process, causing it to turn off before completing a cycle. This issue requires professional attention.
Why Short Cycling Matters
Short cycling not only results in uneven heating and discomfort but also:
- Increases energy consumption, leading to higher utility bills.
- Puts excessive strain on furnace components, potentially shortening its lifespan.
- Raises the risk of furnace breakdowns or costly repairs.
How to Address Furnace Short Cycling
- Change or Clean Air Filters: Ensure regular maintenance to keep airflow unrestricted.
- Check Thermostat Placement: Relocate or recalibrate the thermostat if needed.
- Inspect Ductwork and Vents: Clear any blockages or open closed vents.
- Professional Maintenance: Schedule regular furnace tune-ups to ensure all components are functioning properly.
- Consult an HVAC Technician: If the problem persists, a professional can diagnose and repair complex issues like gas pressure irregularities or faulty parts.
If you suspect your furnace is short cycling, addressing the problem promptly can restore comfort to your home and protect your heating system from further damage.
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See What Our Customers Are Saying:
Jul 28, 2022
On coldest night of the year our furnace quit. At 8:40 in the morning Greg arrived and gave us a diagnosis and a recommendation. By 2:30 we had a new furnace and were warm again. Great company. Great customer service. Good reasonable price.
Peter, Pickering
Jul 3, 2022
Twin tech team was very efficient and prompt. They provided a quote within hours of request and got the job done on time. No disruption to home function. We would highly recommend this team. Job well done.
Jul 3, 2022
Our furnace bit the dust, and Twintech came out to troubleshoot and diagnose the problem within a couple of hours. Mitch was super helpful, patient, and answered all of our questions. When we decided to get the furnace replaced, the crew was over first thing the next morning and did a fantastic job. Not only did they complete the job in a few hours, but they cleaned up and respected our house as they went, and answered all of our follow-up questions. I've used Twintech for our HVAC needs in the past and will continue to do so. I'd recommend them to anyone, and it feels good to support a local, family-owned business.
Jul 3, 2022
Dave and the Twintech team were fabulous from day 1 and helped us through the process to identifying a new furnace and AC unit. This was our first time through this process and Dave did a thorough job explaining all the components and was very patience answering all our questions. Dave provided great insights and fair pricing.
The Twintech team did an awesome installation. Very clean and efficient. I would highly recommended their service.
Jul 3, 2022
We had a new Amana furnace installed by Twintech and we were very pleased with the installation. It is nice to have a warm house again.
Jul 3, 2022
Excellent job. Excellent service. Competitive price. Its rare to find a company with the knowledge and professional results we have experienced with Twintech. The clean and neat installation with attention to detail and drop sheers to respect our property is a clear indication of Twintechs high level of integrity. The 1-1/2 gas line upgrade they did for our pool 3 years ago was awesome. Can't say enough. Thank-you Twintech.
Jul 3, 2022
Twitch did a great job with the installation of our new furnace. I really appreciated their honesty and I could trust what they were telling me. Another company tried to suggest significantly more work at a greater cost claiming it was necessary to meet current building code. Twintech is very fair. All staff I meet were friendly, polite and trustworthy. I would recommend Twitch for a furnace.
Jul 3, 2022
This is a professional team that's easy to deal with. I would strongly recommend them
Jul 3, 2022
Very professional firm from start to finish!
They removed the old oil tank and furnace. They installed air conditioning and a new propane furnace.
Professional installation, on time and no mess.
Very pleased with their work and would highly recommend the company. Our house is three stories so they spent the time to do all the calculations to make sure we would have great performance on each floor.
Thank you again!
Jul 3, 2022
Upon a routine yearly maintenance, it was discovered there was a leak in the heat exchanger and a I needed a new furnace. I know nothing about these things and was completely stressed out. The company I had the maintenance plan with quoted me a huge number to rent a furnace, I just wanted to cry. Then I spoke to Dave at Twintech. He was so knowledgeable and calming, provided me a fair quote and within a few days I had an amazing crew show up to my house and install my new energy efficient furnace! I have already recommended these wonderful people at Twintech to a good friend of mine. Thank you Twintech!!
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