Your HVAC system runs 24/7, 365. At that rate, it won’t last forever. The average lifespan of an air conditioner is about 12 to 15 years. So, if you stay in one home for long enough, it’s inevitable you will need to replace your system.

It’s also one of the more expensive home maintenance tasks you’re likely to face, most likely you’re going to want to delay that investment as long as possible. And since replacing a broken HVAC system isn’t one of those jobs you can put off until a rainy day, it’s important to look after the system you have and be ready for when that down-time does strike (let’s just hope it’s not mid-Florida summer!). Follow these tips to extend the life of your HVAC system and delay replacement as long as possible.

How to Extend the Lifespan of your HVAC System

If you’re kind to your HVAC system, it will be kind to you. It’s not unheard of for air conditioners to last for years beyond the average lifespans. But even a long system life can come with its own costs and risks.

As your equipment gets older, even if it’s well cared maintained, it will suffer reduced energy efficiency which gets worse the older the system is. This will cause your utility bills to gradually creep up. And individual parts will all meet their end at some point, so you’re likely to spend more on emergency repairs once your system reaches its golden era.

Now, while your system is giving you all those years of great service, HVAC technology is always improving. By the time you’re ready for replacement, the latest HVAC systems will be more efficient than your old system even was when that system was brand new — and the difference could be surprising.

Here are our seven important factors to consider for getting the longest life out of your HVAC system:

1. Schedule two tune ups per year.

HVAC systems aren’t particularly high maintenance, but that doesn’t mean routine maintenance isn’t important. Your air conditioner should both be inspected, cleaned and tuned up every year. It’s best to schedule your air conditioner service in fall and your cleaning service in winter or early spring — that way, your system will be optimized for efficiency the first day you need it, and if a serious problem is discovered, you can deal with it before it comes time to switch systems.  

Tune ups  typically include a thorough inspection and lubrication of all moving parts, condenser cleaning, clearing buildup out of the condensate drain tube, checking refrigerant levels, replacing filters, checking the heat exchanger for cracks and other tasks that make your system safer, more efficient and longer-lasting.

2. Change the Air Filter Every Quarter or 30 days depending on type.

Though your HVAC technician should check your filters during your checkups, this task is really up to the homeowner. Most homeowners use disposable 30-day fiberglass filters or 3-month pleated filters, and these should be checked regularly. If they’re seriously dirty, they should be replaced, even if it’s ahead of schedule.

A dirty air filter means that your HVAC system has to work harder to circulate air throughout your home. This can be especially taxing on the fan, but the whole system can suffer when it can barely breathe.

3. Set the Thermostat on Auto Fan 

Most HVAC systems have two fan settings: “auto” instructs the fan to run only when the system is actively heating or cooling, and “on” instructs the fan to run constantly. Some systems have dual-speed fans, which allow for a slower, more energy-efficient fan setting between heating and cooling cycles.

There are benefits to using the “on” setting. It helps trap more dust, and in homes with people who have respiratory sensitivities or allergies, it can help make it easier to breathe. But the major disadvantage is that it forces the system to work much harder, and that shaves time off of its life. It also leads to filters that clog up faster, so if you don’t change them regularly, you could really be over exerting your system.

4. Visually your Condenser Periodically 

Somewhere outside your home is your air conditioner’s condenser, which is built to stand up to the elements. It can, however, become damaged from hail or windblown debris from severe storms. Every once in a while, and especially after every major storm, look over your condenser for signs of damage.

While you’re there, be sure to clear away any accumulation of leaves or weeds on or around the condenser. If vegetation is growing right next to the unit, cut it down. Your condenser needs room to breathe, too.

5. Have your Insulation Inspected 

The less often your HVAC system runs, the longer it will last. And in the struggle to keep your treated air inside your home, insulation is your best friend.

The most important place to check for sufficient insulation is in your attic. The amount and type you need varies by region, so check the Environmental Protection Agency’s insulation climate map for guidelines for insulation upgrades.

If you have insufficient insulation throughout your home, it may also be worthwhile to add more insulation into wall cavities. The best way to locate and evaluate your insulation weak spots is to schedule a professional energy audit.

6. Upgrade To a Smart Thermostat 

The latest in thermostat technology, smart thermostats are easy to program and control from anywhere using your smartphone or tablet. Some models can even learn your living habits and schedule so they can make energy-saving adjustments without any programming at all.

When it’s easier to micromanage your thermostat settings, it’s easier to use your system less. And that will make it last longer.

7. Reduce Wear And Tear On Your System with These Extra Steps

Don’t stop with just the smart thermostat; give your system a break by using your ceiling fans during hot weather to stay cool while pushing the temperature a little higher. Invest in reflective shades to block out unwanted heat from the sun.

Then, in winter, throw those shades open to let the free heat pour in, and use sweaters, blankets and space heaters to stay comfortable while setting the thermostat a little lower.

When to Replace Your HVAC System

Taking great care of your HVAC system is only part of the battle — and replacing it at the right time is the other part.

None of us can predict the future, so it can be tricky to make sure you get the longest possible life out of your equipment while also avoiding the costs of efficiency losses and parts replacement due to age. The best way to estimate the ideal time for replacement is to choose a reliable HVAC company to perform your preventative maintenance and ask for their input. Be honest with them about the maintenance you’ve performed as a homeowner — if you’ve been lax about replacing the filter, for example, or if you frequently use the “on” fan setting. If you trust your HVAC technician, her opinion is the most valuable. 

Don’t delay schedule your annual cleaning today and extend the life of your HVAC system.