How to Extend the Life of Your Furnace
A new furnace is one of the most significant and important investments you will make in your home. It is a complex piece of machinery that you and your family will rely on for warmth, safety, and comfort for many years to come. The average modern furnace is built to last for about fifteen to twenty years, but that lifespan is not a guarantee. It is a potential that is heavily influenced by how the system is cared for throughout its life.
Like any valuable piece of mechanical equipment, a furnace requires consistent and proper care to operate reliably, efficiently, and for its full expected service life. Neglecting your furnace can lead to a steady decline in its performance, an increase in your energy bills, and ultimately, a premature and costly failure that could leave you in the cold on a frigid winter night in Clarksville. Fortunately, maximizing your furnace’s lifespan does not require a great deal of effort. By focusing on a few key strategies, you can protect your investment and ensure your furnace provides dependable comfort for decades.
Master the Basics of Airflow
The single most important and impactful maintenance task that a homeowner can perform for their furnace is the simple act of changing the air filter regularly. It is easy to think of the filter as a component that only affects your home’s air quality, but its primary mechanical purpose is far more critical: it protects the sensitive and expensive internal components of your furnace from being damaged by dust, dirt, and other airborne debris.
Your furnace needs a constant and massive volume of air to function correctly. The filter is the gatekeeper for all of this air. As it does its job of trapping contaminants, it gradually becomes clogged. A dirty, clogged filter is like forcing your furnace to breathe through a pillow. This severe restriction of airflow sets off a destructive chain reaction. First, the indoor blower motor has to work much harder to pull air through the filter, which puts an immense strain on the motor and can cause it to overheat and burn out prematurely.
The lack of proper airflow also prevents the heat produced by the burners from being effectively carried away from the heat exchanger. This causes the internal temperature of the furnace to rise to a dangerously high level. A safety device called a high-limit switch will detect this overheating and will shut off the burners to prevent a fire or damage to the unit. This is the cause of a furnace that seems to run for a few minutes and then just shuts off, long before your house is warm. Most dangerously, this repeated overheating can cause the metal of the heat exchanger to fatigue and crack over time. A cracked heat exchanger is a catastrophic failure that can allow deadly carbon monoxide to leak into your home’s air supply.
All of these serious and expensive problems can be prevented by a simple and inexpensive task. You should locate your furnace filter and get into the habit of checking it once a month. During the heating season, when the system is running frequently, you should plan to replace it at least every 90 days. If you have pets that shed or live in a particularly dusty environment, you should change it even more often, perhaps every 30 to 45 days. This simple habit is the absolute key to a long and healthy life for your furnace.
Having issues with your furnace? Learn more about our furnace repair services.
Keep the System’s Environment Clear
In addition to ensuring clean air can get to your furnace, it is also essential to ensure the furnace has a safe and clear environment around it, and that the warm air it produces has a clear path throughout your home.
Your furnace is typically located in a basement, a utility closet, or an attic. These areas often double as storage spaces, but it is critical that you maintain a clear space of at least two to three feet around the furnace unit itself. Piling storage boxes, old furniture, or other items directly against the furnace can block the vents and louvers that are essential for proper combustion and ventilation. You should never, under any circumstances, store flammable materials such as gasoline, paint, solvents, or cleaning supplies anywhere near your fuel-burning furnace.
The principle of clear airflow extends to your entire home. Your HVAC system is designed to be a balanced, closed-loop system, and it relies on both the supply and return air vents in your rooms to circulate air properly. Closing the vents in several unused rooms or blocking a large, central return air grille with a piece of furniture or a large rug can create a significant pressure imbalance within your ductwork. This has the same effect as a clogged filter, putting a major strain on your furnace’s blower motor and potentially leading to overheating. A seasonal walk-through of your home to ensure all your vents are open and unobstructed is a wise and simple maintenance step.
For homeowners with a modern, high-efficiency condensing furnace, there is one more crucial checkpoint. These furnaces have two plastic PVC pipes that typically run from the furnace to an exterior wall of the home. One pipe is the intake, which brings in fresh air for combustion, and the other is the exhaust. It is vital that the termination points of these pipes on the outside of your home are kept clear of any obstructions, such as heavy snow drifts, leaves, or animal nests, to ensure your furnace can operate safely.
Use Your Thermostat Wisely
How you operate your thermostat on a daily basis can also have a cumulative effect on the wear and tear your furnace experiences over the years. A system that is subjected to constant, drastic temperature changes will experience more stress than one that is allowed to maintain a more consistent state.
Every time your furnace starts up from a cold state, it goes through a “hard start,” which is the most stressful part of its operational cycle. If you are in the habit of turning your heat completely off when you leave for the day and then cranking it way up when you get home, you are forcing your system to go through these stressful cycles frequently.
Is your thermostat acting up? Click to learn more about a new, smart thermostat.
A far better approach for both efficiency and the longevity of your equipment is to use a programmable or smart thermostat. These devices allow you to set a more moderate temperature “setback” of 7 to 10 degrees when you are away or asleep. This prevents your furnace from shutting off completely and allows it to maintain a baseline temperature with longer, gentler, and more efficient run cycles. It also means that when it is time to return to your normal comfort setting, the “recovery” process is much less dramatic and places less strain on the equipment. Using a thermostat to create a smooth and consistent operating schedule is a smart way to reduce the daily stress on your furnace.
Commit to Annual Professional Maintenance
While the do-it-yourself steps of changing your filter and keeping your system clear are essential, they are not a substitute for the comprehensive care that can only be provided by a professional. Committing to an annual furnace tune-up and safety inspection from a certified HVAC technician is a non-negotiable part of responsible furnace ownership and a key strategy for maximizing its lifespan.
A furnace is a complex appliance that involves the combustion of fuel, high-voltage electrical components, and intricate safety controls. There are numerous critical maintenance and inspection tasks that simply cannot be safely or effectively performed by a homeowner. A professional tune-up is a deep, multi-point service that addresses every aspect of your furnace’s performance. A certified technician will deep-clean the furnace burners to ensure a clean and efficient combustion process, which saves you money on fuel and reduces stress on the heat exchanger. They will also clean the flame sensor to prevent nuisance shutdowns and clean the blower motor assembly to ensure proper airflow.
Most importantly, the annual tune-up is a critical safety inspection. The technician will perform a thorough visual inspection of your furnace’s heat exchanger, looking for any small cracks or signs of rust and fatigue that could indicate a risk of a carbon monoxide leak. They will test every safety sensor and control to ensure they are functioning correctly, check and tighten all electrical connections to prevent failures, and measure the gas pressure to ensure it is perfectly aligned with the manufacturer’s specifications. This professional service is the best way to catch small problems before they become major, expensive breakdowns, and it is also required by most manufacturers to keep your system’s parts warranty valid.
Click here to learn more about furnace maintenance.
Your furnace is a major investment in your home and your family’s comfort. It is a reliable workhorse that can provide you with two decades or more of dependable service, but only if it is given the consistent care and attention it needs to operate safely and efficiently. A furnace that is neglected is a furnace that is destined for a shorter, less efficient, and more trouble-prone life.
By embracing these powerful strategies: being diligent about your air filter, maintaining a clear and safe operating environment for your equipment, using your thermostat wisely, and, most importantly, committing to annual professional maintenance, you are taking the most effective steps possible to protect your investment. This proactive approach will pay you back for years to come in the form of lower energy bills, a reduced risk of a mid-winter breakdown, and the invaluable peace of mind that comes from knowing your system is running safely. If you are ready to prepare your furnace for the season ahead, contact the expert team at Barney’s Heating and Air to schedule your comprehensive tune-up for your Clarksville home.