How long should my air conditioner last?

Key tips to remember

  • Keep the condenser coils clean
  • Shade the units
  • Change the air filter
  • Invest in a smart thermostat
  • Check your ducts
  • Limit ventilation fan use
  • Close off unused rooms
Maintenance and Repairs

An air conditioner is a sizeable investment for the average homeowner, but – as anyone will tell you – it is absolutely necessary in hotter climates. According to This Old House, air conditioner units usually last from 10 to 15 years, but there are a number of steps you can take to improve your air conditioner's efficiency and make it last as long as possible. If you are worried about the sudden cost of replacing an air conditioning unit, a Cinch home warranty may relieve your worries by reducing your expenditure to a low, monthly cost. In the meantime, here are a few of our expert tips to help keep your units in tip-top shape for when you need them.


Keep condenser coils clean
Condenser coils are the coils on the outside of your air conditioning unit that are used to expel heat to the outside. If your coils get dirty, your air conditioner is forced to do more work to achieve the same result. This means lower efficiency and a shorter lifespan for your unit. You can clean the condenser coils yourself, or a Cinch HVAC professional can clean them for you during routine maintenance. In addition, make sure that you are keeping animals away from your outdoor air conditioner, as their urine will corrode the coils, according to Complete Air Mechanical.


Shade the unit
By keeping your air conditioner in the shade, you will allow the unit to do less work, lowering your monthly electricity bill. However, you must be careful to keep shrubs and branches from getting too close to the air conditioner. Comfort Mechanical recommends that you keep shrubs and trees at least 18 inches to 24 inches away from the sides of the unit, and ensure that nothing above the air conditioner is closer than 60 inches.


Change the air filter
As with all appliances that work by circulating air, your air conditioner has a filter to keep dirt and other particles from entering the appliance. A dirty air filter will restrict air flow through your air conditioner, which can cause the system to freeze up. According to Complete Air Mechanical, neglected air filters are the number one cause of premature condenser failure. At least once a month, wash or change your air filter, depending on the air conditioning unit you own.


Invest in a smart thermostat
The less work your air conditioner does, the longer it will last and the less you will pay. A smart thermostat can be preset to change the temperature in your home at certain times so that you aren't cooling an empty house. Comfort Mechanical suggests that you set your thermostat to run at 78* degrees when you are home and 85 degrees when you are not – an adjustment that they say can save you hundreds of dollars a year in energy savings alone. Smart thermostats cost between $50 to $200, and can yield similar savings in winter heating costs, meaning that one will probably pay for itself in one to two years. As an added bonus, digital thermostats tend to be accurate +/- 1 degree, compared to +/- 3 to 4 degrees with a mercury thermostat.


Check your ducts
Just like with heating, it is important to make sure that your ducts are sealed in order to avoid losing cold air. First, check the connections between your exposed ducts to ensure that they haven't pulled apart. Next, look for any holes caused by stress or corrosion. Either problem means that your conditioned air is escaping, costing you money and making your air conditioner work harder to cool your house. Duct tape has been proven to be ineffective in patching ducts, so the best course of action is to hire an HVAC worker (or request service from Cinch if you’re protected under our warranty). If you prefer to do the repairs yourself, choose a non-cloth-backed tape, like foil tape, to get the job done.


Keep your return air grill clear
Your return air grill may look very much like a normal air output grill, but it’s probably installed somewhere inconspicuous in your home. Where normal air output grills push cold air into your home, a return air grill sucks air back into the cooling system for recycling. If your return air grill is covered by furniture, airflow will be restricted to the air conditioner, so it’s important to keep the area around it clear. If it’s covered, it can cause the coil to freeze, which in turn can lead to the premature breakage of the compressor.


Limit ventilation fan use
Ventilation fans are useful for clearing your home of smoke from the kitchen or humidity from your hot showers, but they also suck your conditioned air out more quickly than you might imagine. Complete Air Mechanical reports that a ventilation fan can clear a home of hot or cold air in about an hour, so turn that fan off as soon as you're done with it.


Close off unused rooms
If you have a large home, there's a good chance that you have a room or two that doesn't get used very much. To reduce the load on your air conditioner and lower your electricity bill, close the vents and doors to the rooms you don't use often to significantly reduce the amount of work your air conditioner (or heater) has to do.

Regular maintenance of your home’s appliances and systems is essential to extending their life cycles. And a Cinch home warranty is a great way to get covered for it. You can get quarterly home maintenance services along with affordable connected home solutions to help protect yourself from unanticipated expenses while being proactive about your home protection. 


*Complete Air Mechanical reports that for every degree that you set your thermostat to below 78 degrees, you increase your energy consumption by an average of eight percent.


The information in this article is intended to provide guidance on the proper maintenance and care of systems and appliances in the home. Not all of the topics mentioned are covered by our home warranty or maintenance plans. Please review your home warranty contract carefully to understand your coverage.