How often do AC units need to be replaced?

Author: Prof. Dax Monahan MD  |  Last update: Wednesday, January 28, 2026

If you kept your air conditioner in good condition over its lifetime, expect to need a replacement in about 10-15 years. Keep in mind that as your A/C grows older, its mechanical parts can become unavailable or obsolete over time. If you aren't able to replace a broken part, you will need to purchase new unit.

How do I know when to replace an AC unit?

10 Signs It's Time To Replace Your HVAC System
  1. HVAC Unit Is 10+ Years Old.
  2. Blowing Warm Air Or Not Blowing Cool Air.
  3. Poor Or Weak Air Flow.
  4. Loud Or Unusual Noises.
  5. Humidity In The Home.
  6. Foul Odors.
  7. Leaks.
  8. Frequent Or Short Cycling.

Can an AC unit last 25 years?

Here's how long some of the most common types of AC last:

Central air-source heat pumps — 15 years (and up to 20–25 years if well-maintained and in a well insulated home) Ductless mini-split AC systems (heat pumps) — 20 years.

How much should it cost to replace an AC unit?

The average homeowner spends around $5,955 to install new air conditioning, but costs range from $3,906 to $8,016, depending on the unit's size and type. The key to beating the heat this summer is running a good AC. You can expect to pay an average of $5,955 for AC replacement costs.

Should I replace my 10 year old AC unit?

It may be time to call a professional contractor to help you make a change if: Your heat pump or air conditioner is more than 10 years old. Consider replacing it with a unit that has earned the ENERGY STAR label. Installed correctly, these high-efficiency units can save up to 20 percent on heating and cooling costs.

When Should Air Conditioner or Furnace be Replaced?

How much cheaper are new AC units to run than 20-year old units?

How much will a new AC unit save me? How much you can save with a new AC unit will depend on your old unit, the replacement model, how much you use your air conditioning, and the cost of electricity where you live. Estimates vary from 10% to 50% savings on your air conditioning costs per year.

Is it worth fixing a 20-year old air conditioner?

Air conditioner is over 15 years old

The typical lifespan of an air conditioner is around 15 years, at which time it must be changed. Some air conditioners may work well beyond their designed lifespan, but they become less efficient with time.

Can I just replace my outside AC unit?

Your Warranty Might Be Voided

This could mean the difference of your manufacturer covering the cost of replacement or repair down the road versus you footing the entire bill. To summarize so far, the answer to “can you replace just the outside AC unit” is: not unless you want major issues.

Does home insurance cover an AC unit?

A standard homeowners insurance policy provides coverage for heating, ventilation and air conditioning (HVAC) systems if they're damaged by a fire, for example. But if your AC unit stops working due to an accident or normal wear and tear, your insurance company probably won't pay your claim.

What time of year is the cheapest to replace HVAC?

Better pricing: Since there's less demand for HVAC system replacement in spring and fall, your HVAC contractor might even offer their own savings incentives.

Which AC brand lasts the longest?

Which HVAC Brands Last the Longest?
  • Mitsubishi Electric: Superior Efficiency and Durability. ...
  • Goodman Air Conditioning and Heating: Affordable and Long-Lasting. ...
  • Rheem: Reliable Performance for Decades. ...
  • Honeywell: Smart Home Integration and Durability. ...
  • Lennox: High-End Performance for the Long Haul.

Why are HVAC units so expensive now?

Few industries have been as affected by the turbulent global landscape as HVAC. Rising raw material costs, supply chain disruptions, labor shortages, environmental regulations, and consumer demand spikes have all contributed to the noticeable escalation in equipment and installation prices.

What is the 5000 rule for HVAC?

The $5,000 rule is an industry-accepted rule for determining whether to repair or replace an HVAC system. Multiply the age of your equipment by its estimated repair cost. If the outcome is under $5,000, you should probably repair it. If over $5,000, you should replace it.

How much does an air conditioner cost for a 2000 sq ft home?

Average New AC Unit Costs

The average cost of installing a new central air conditioner in 2024, including equipment and labor costs, is $5,750 for a 3-ton unit in a 2,000-square-foot home. On average, a new AC unit cost will fall between $3,300 and $7,800.

How many hours does it take to install a new AC unit?

First, your new air conditioner can likely be installed in just one day, with the vast majority of installations taking 4-8 hours. Don't worry, you're not going to be left to fend for yourself in the sweltering heat of your own living room for long.

How much does a new HVAC system cost?

According to HomeGuide.com, the average cost to replace the HVAC units is $5,000 to $11,000; to replace the units with ductwork runs between $7,000 and $16,000 in total.

How long should a residential HVAC system last?

A heating or cooling system is a significant investment, and it only makes sense to get as much use out of it as possible. In general, most HVAC systems will last 15 to 25 years, but depending on the type of system and other contributing factors, that estimate can be highly variable.

How much does it cost to replace an AC compressor?

On average, AC compressor costs range from $800 to $2,300, with most folks paying $1,200 for a new one. However, your price will vary depending on factors like the size and brand of your compressor. Before you schedule your replacement, read on to learn about all AC compressor cost factors.

How much does it cost to replace an outside AC unit?

The cost of replacing an HVAC system typically ranges from $6,224 to $11,434. This HVAC replacement cost depends on your home's size, the system type, and installation requirements.

What is the average life of an outside AC unit?

Unlike furnaces, air conditioners are often outdoors and exposed to extreme temperatures throughout the year, which shortens their life expectancy. Modern air conditioners can last between 15-20 years, and older air conditioners last around 10-12 years.

What is the most expensive part to replace on an AC unit?

Usually, it is a quick fix, but sometimes the failure can be caused by a much bigger problem. The most expensive part of an AC unit to replace and repair is the air compressor.

How do I know when my AC needs replacing?

10 Signs Your Air Conditioner Needs Repair or Replacement
  1. Air Conditioning System is Blowing Warm Air. ...
  2. AC Thermostat is Not Working. ...
  3. Little Air Blows Out of Vents. ...
  4. Loud Noise Inside of the AC Unit. ...
  5. Strange Odors When AC Turned On. ...
  6. Not Enough Humidity Removed By the AC. ...
  7. Problems with the AC Are Occurring More Often.

Do new AC units come with refrigerant?

Yes. All of the air conditioning systems we offer are pre-charged to allow for the volume of about 20 feet of refrigerant lines.

What seer is a 20-year-old AC?

Repair: Older AC units typically have lower energy efficiency ratings (SEER), which means higher electricity costs. For instance, a 20-year-old unit may have a 10- or lower SEER.

Previous article
Can mold in air ducts make you sick?
Next article
Why does a cotton wash take 3 hours?