Comfort Corner

How Long Will My Central Air Conditioner Last?

Written by Homestead Comfort | Oct 30, 2025 3:19:25 PM

Practical tips to get the most from your A/C — and when to replace it.

With temperatures rising in Tolland, Hartford and Windham Counties, having a well-operating cooling system is an absolute must. But if your central air conditioner is showing signs of wear and tear, you may be wondering how much longer it will last.

While air conditioners are built to be durable and efficient, many factors affect their lifespan. With proper care and maintenance, you can extend the life of your system and maximize your investment. Homestead Comfort is here to help you in that process. Here’s what you need to know about how long your system will last and when it might be time to replace it.

Average Lifespan of a Central Air Conditioner

On average, central air conditioning units last between 12 and 17 years. The actual lifespan depends on factors such as usage and the quality of the unit. Systems that are well-maintained and used correctly can last closer to 20 years.

Getting the Longest Service Life from Your Central A/C

Want to make your system last? Here are some essential maintenance tips to keep your central air conditioner running efficiently for as long as possible:

  1. Change air filters regularly. A clogged air filter forces your A/C to work harder and wear out faster. Inspect your filter monthly during peak cooling season and replace it if it’s dirty.
  2. Keep outdoor equipment clear. Ensure your outdoor unit is free from debris, weeds or overgrown plants. Clearing at least two feet of space around the condenser allows air to flow freely.
  3. Schedule annual maintenance. Annual tune-ups by a certified HVAC professional can boost equipment efficiency, reduce repairs and extend the service life.

Following these steps not only keeps your A/C running smoothly but also lowers your energy bills and prevents unexpected breakdowns.

Signs Your Central A/C Is Struggling

Recognizing when your air conditioner is nearing the end of its life can save you from sudden failures during the hottest months. Look out for these warning signs:

  • Warm Spots in Your Home — If cooled air isn’t reaching all areas evenly, it may indicate your system is losing efficiency.
  • Rising Energy Bills — A sharp, unexplained increase in electricity costs may be the result of your system using more power to cool your home.
  • Strange Noises or Odors — Clanging, screeching or musty smells could indicate internal issues such as mechanical failure or mold growth.
  • Frequent Repairs — If breakdowns are becoming a regular occurrence, it’s time to evaluate your system’s future.

Central A/C: Repair or Replace?

When your air conditioner starts to falter, deciding whether to repair or replace it can feel daunting. Consider replacing your system if:

  • Repairs Cost More Than Half of a New System — If repair costs surpass 50% of the replacement cost, investing in a new system makes more financial sense.
  • It Uses Phased Out R-22 Refrigerant — Since this material is no longer produced, repairs for older units are more and more expensive.
  • It’s Inefficient — A/C systems with ratings below 13 SEER can cost you significantly more in energy bills over time.

New high-efficiency units can dramatically cut electricity consumption, keep your home more reliably cool and sizzling afternoons and may even qualify for rebates or tax credits.

Take the Next Step with Homestead Comfort

If your central air conditioner is struggling or you’re unsure how much life it has left, reach out to Homestead Comfort. Our team of HVAC experts can help you evaluate your system, determine the best course of action, and recommend solutions tailored to your home and budget.