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  • Writer's pictureJesse Gonzalez

Why Does My Furnace Turn Off & On Randomly?


A furnace that turns itself off and on randomly is known as "short-cycling." It can be a sign of an underlying issue with your furnace, such as clogged air filters or overheating components. Other times it may be caused by a thermostat issue. Short cycling can also cause other problems to arise, such as increased energy bills, reduced system lifespan, and uncomfortable temperatures throughout the house.


To fix the short cycling issue, you must first identify what is causing it. The most common causes are dirty air filters, improper thermostat settings, closed supply registers in some rooms, and blocked condensate drains. Once you’ve identified the root cause of the short cycling problem, you can begin to address it. This may include cleaning or replacing the air filter, adjusting the thermostat settings, opening up supply registers in rooms that are too cold and unclogging condensate drains.


In some cases, short cycling could be caused by a more serious issue within the furnace itself, such as a malfunctioning blower motor or bad heat exchanger. If this is the case, contact a professional HVAC technician to diagnose and repair your furnace before further damage occurs.


It’s important to fix any short cycling issues as soon as possible to prevent further damage to your furnace and ensure it runs efficiently for years to come. With regular maintenance and proper repairs, you can keep your furnace running for a long time.


Trust Rancho Heating & Air Plumbing to provide you with the highest quality of service for your furnace. We are the experts when it comes to furnace repairs and maintenance, and the people of RSM know that all too well. Our commitment to excellence has earned us recognition from Expertise.com as one of the best plumbers in 2021 and consistently outstanding reviews from our customers since we were founded. There is no better company you can trust for all your furnace needs than us! Not only do we provide solutions that save you time and money, but also ensure your satisfaction with exceptional customer service. So don't wait any longer; give us a call to book your appointment today! We guarantee that our service will not only get your furnace up and running, but also keep it that way for years to come.

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