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How Long Does an AC Compressor Last?

Published in AC Unit Lifespan 3 mins read

An AC compressor typically lasts around 15 years, often mirroring the lifespan of the entire air conditioning unit itself. However, with diligent maintenance, its operational life can be extended significantly.

The compressor is the heart of your air conditioning system, responsible for circulating refrigerant and enabling the cooling process. Its longevity is crucial for the overall performance and lifespan of your AC unit.

Factors Affecting Compressor Lifespan

Several elements can influence how long your AC compressor will function effectively:

  • Maintenance: Regular, professional maintenance is the single most significant factor in extending a compressor's life. Lack of maintenance leads to increased wear and tear.
  • Usage: How often and how hard your AC unit works directly impacts the compressor. Units in hotter climates or those that run continuously may experience shorter lifespans.
  • Installation Quality: Proper installation ensures the system runs efficiently without putting undue stress on the compressor.
  • System Size: An improperly sized unit (too large or too small) can cause the compressor to cycle on and off too frequently or run constantly, both of which reduce its lifespan.
  • Environmental Factors: Exposure to harsh weather, debris, or even salty air near coastal areas can affect the external components and potentially the internal workings over time.

Extending Compressor Life with Maintenance

As the reference highlights, proper maintenance is key to getting the most years out of your compressor. Regular service can help identify potential issues early, prevent breakdowns, and ensure the system runs efficiently.

Key maintenance practices include:

  • Regular Filter Changes: A dirty air filter restricts airflow, making the compressor work harder.
  • Coil Cleaning: Evaporator and condenser coils get dirty over time, reducing efficiency and increasing strain on the compressor. Professional cleaning is essential.
  • Checking Refrigerant Levels: Low refrigerant levels force the compressor to overwork, leading to premature failure. Leaks should be found and repaired.
  • Inspecting Electrical Components: Loose connections or failing components can cause the compressor to short cycle or run improperly.
  • Clearing Debris: Ensure the outdoor unit (condenser) is free from leaves, grass clippings, and other obstructions that block airflow.

Replacing the Compressor vs. The AC Unit

When an AC compressor fails, homeowners often face the decision of replacing just the compressor or installing an entirely new AC unit. The reference notes that many believe replacing just the compressor is often more cost-effective when it gives out. However, the best choice depends on several factors:

  • Age of the Unit: If the unit is nearing or past its typical 15-year lifespan, other components may also be close to failing. Replacing the entire unit might be a better long-term investment in this case.
  • Cost: Replacing just the compressor is usually less expensive upfront than replacing the entire unit, but it is still a significant expense.
  • Warranty: If the unit or compressor is still under warranty, the cost of replacement may be covered.
  • Efficiency: Newer AC units are significantly more energy-efficient than older models, which can lead to substantial savings on energy bills over time.

Ultimately, while a typical AC compressor is built to last around 15 years, its actual lifespan is heavily influenced by how well the entire system is maintained and operated throughout its service life.