How Often Should My AC Unit Be Serviced?


Regular maintenance is essential for keeping your air conditioning (AC) unit running efficiently and prolonging its lifespan. But how often should you have your AC unit serviced? In this guide, we’ll explore the answer to the question “how often should my AC unit be serviced?” and provide valuable insights to help you maintain optimal performance and comfort in your home.

Understanding the Importance of AC Maintenance

Why AC Maintenance Matters

Regular AC maintenance is crucial for several reasons:

  • Efficiency: Regular servicing helps your AC unit operate at peak efficiency, reducing energy consumption and lowering utility bills.
  • Reliability: Routine maintenance can prevent breakdowns and costly repairs, ensuring that your AC unit functions reliably when you need it most.
  • Comfort: Properly maintained AC units provide consistent cooling and humidity control, creating a comfortable indoor environment.
  • Longevity: By addressing minor issues early and preventing major problems, regular maintenance can extend the lifespan of your AC unit.

How Often Should I Have My AC Unit Serviced?

General Guidelines

While there is no one-size-fits-all answer to how often your AC unit should be serviced, most experts recommend scheduling annual maintenance. Annual servicing allows HVAC professionals to inspect, clean, and tune up your AC system to ensure optimal performance.

Factors to Consider

Several factors can influence the frequency of AC servicing, including:

  • Age of the AC Unit: Older AC units may require more frequent maintenance to address wear and tear and ensure continued performance.
  • Usage: AC units that run constantly or are used year-round may benefit from more frequent servicing.
  • Climate: AC units in hot and humid climates may experience more strain and require more frequent maintenance to keep up with demand.
  • Manufacturer Recommendations: Check the manufacturer’s recommendations for your specific AC unit, as they may provide guidelines for servicing intervals.

Signs Your AC Unit Needs Servicing

In addition to annual maintenance, be vigilant for signs that your AC unit needs servicing between scheduled appointments. These signs may include:

  • Reduced Cooling Performance: If your AC unit is struggling to maintain a comfortable temperature, it may indicate a problem that requires servicing.
  • Strange Noises: Unusual noises such as rattling, banging, or squealing could signal mechanical issues that require attention.
  • Increased Energy Bills: A sudden increase in energy bills without a corresponding increase in usage could indicate inefficiency or a malfunctioning component.
  • Frequent Cycling: If your AC unit cycles on and off frequently, it may be overworking itself or experiencing issues with the thermostat or compressor.
  • Leaks or Moisture: Any signs of water leakage or moisture around your AC unit could indicate a problem with the condensate drain or refrigerant line.

Benefits of Professional AC Servicing

What Professional AC Servicing Entails

Professional AC servicing typically includes:

  • Cleaning: Removing dirt, dust, and debris from the condenser coils, evaporator coils, and filters to improve airflow and efficiency.
  • Inspection: Checking for signs of wear and tear, leaks, and other issues that could impact performance.
  • Tuning: Adjusting components such as belts, motors, and refrigerant levels to ensure optimal operation.
  • Repairs: Addressing minor issues before they escalate into major problems that require costly repairs.

The Value of Professional Expertise

While DIY maintenance tasks such as changing air filters can help keep your AC unit running smoothly between professional servicing, there’s no substitute for professional expertise. HVAC technicians have the training, experience, and specialized tools to identify and address issues that may not be apparent to the average homeowner.


Regular servicing is essential for maintaining the performance, efficiency, and longevity of your AC unit. While annual maintenance is a good rule of thumb, factors such as age, usage, climate, and manufacturer recommendations may influence the frequency of servicing. Be proactive in scheduling maintenance appointments and pay attention to signs that your AC unit may need servicing between appointments. By investing in professional servicing and addressing issues promptly, you can ensure that your AC unit continues to provide reliable, efficient cooling for years to come.

Need HVAC Services in St. Louis, MO?

Keep cool or stay warm with Ashley Brothers Heating & Cooling. Since 1999, Ashley Brothers have been providing residential and commercial services to the St. Louis and Jefferson County area. We specialize in the installation of new equipment, heating and cooling repair, and furnace cleaning. Craftsmanship is important, equipment choice is too. We work with only top brands like Amana, Goodman, York, and McLain. It is understandable that replacing or upgrading your equipment can be daunting. Ask us about financing. We repair all heating and cooling equipment brands. Heating and cooling repairs can happen at random, take advantage of our 24-hour emergency service. Call us today about your concerns.