How Often to Service an AC Unit


Keeping your home cool and comfortable relies on a well-maintained AC unit. 

Yet, do you know how often you should be servicing your AC?

This guide covers everything you need to know about servicing an AC unit, including how often to service a unit and the signs that an AC is in need of service. 

From cost-effective tips to the benefits of professional maintenance, learn how to optimize your system’s efficiency and extend its lifespan for year-round comfort.

How Often Should You Service Your Air Conditioner?

The frequency of servicing an AC unit largely depends on several factors, including the unit’s age, usage patterns, environmental conditions, and manufacturer recommendations. However, a general guideline is to service your AC system at least once a year to ensure optimal performance and longevity.

For most residential AC units, an annual inspection and maintenance routine before the start of the cooling season is advisable. This proactive approach helps address potential issues before they escalate, ensuring that the system operates efficiently when you need it the most.

Key aspects of an annual AC servicing include:

  • Filter Replacement & Cleaning: Dirty filters restrict airflow and reduce efficiency. Regularly changing or cleaning filters every 1-3 months can prevent this issue.
  • Coil & Fins Cleaning: Over time, the evaporator and condenser coils accumulate dirt, affecting their ability to absorb and release heat efficiently. Cleaning these components during annual maintenance optimizes performance.
  • Checking Refrigerant Levels: Low refrigerant levels indicate a leak, reducing the system’s cooling capacity. This should be checked and addressed by a professional technician.
  • Inspecting & Tightening Electrical Connections: Loose connections can be hazardous and affect the system’s performance. Technicians typically check and tighten these during servicing.
  • Lubrication & Component Inspection: Moving parts require proper lubrication to reduce friction and wear. Additionally, inspecting components for wear and tear helps prevent breakdowns.

However, in regions with extended cooling seasons or harsher environmental conditions, more frequent servicing might be necessary. Additionally, older units or those that undergo heavy usage might benefit from more frequent maintenance to ensure efficiency and prevent unexpected breakdowns.

Regular maintenance not only ensures efficient operation but also helps save on energy bills and extends the lifespan of the AC unit. Consulting a professional HVAC technician can provide tailored recommendations based on your specific system and environmental conditions.

When Should You Service Your Air Conditioner?

The best time to service an AC unit depends on various factors like climate, usage patterns, and the specific needs of your system. However, a strategic approach involves scheduling maintenance during the spring months, preferably before the peak cooling season begins. For most regions, servicing your AC unit once a year is a good starting point, typically before summer’s arrival.

Spring servicing ensures that your unit is ready to handle the increased demand during summer. It allows HVAC professionals to address any potential issues, clean the system thoroughly, and make necessary adjustments before you heavily rely on it for cooling.

This annual check-up before summer offers several benefits:

  • Efficiency Boost: Servicing your AC in spring ensures optimal efficiency during the hot months when the system is most frequently used. Clean filters, calibrated settings, and well-lubricated parts contribute to efficient operation.
  • Preventive Maintenance: Addressing potential problems early can prevent costly breakdowns later. Identifying issues with components like coils, fans, or refrigerant levels beforehand can save you from major repairs or replacements down the line.
  • Extended Lifespan: Regular maintenance helps prolong the lifespan of your AC unit. Keeping it in good condition through annual check-ups ensures it operates effectively for years to come.

Signs Your Air Conditioner Needs Repair

Recognizing signs that your AC unit needs repairs can prevent potential breakdowns, maintain efficiency, and extend the lifespan of the device. 

Indicators that your AC requires attention from a professional technician include: 

  • Poor Airflow: Reduced airflow from vents could indicate issues like a clogged filter, malfunctioning fan, or ductwork problems. Insufficient airflow decreases cooling efficiency and strains the system.
  • Warm Air: If your AC blows warm or slightly cool air instead of cold air, it might signify compressor problems, refrigerant leaks, or issues with the condenser.
  • Unusual Sounds: Strange noises like grinding, squealing, rattling, or banging noises often signal mechanical problems. These could stem from loose parts, damaged components, or motor issues.
  • Frequent Cycling: Short cycling — where the AC turns on and off frequently — can result from various issues like dirty filters, improper thermostat settings, or malfunctioning components, leading to energy inefficiency and wear on the system.
  • Leaks or Moisture: Leaking refrigerant or water around the unit can indicate problems. Refrigerant leaks affect cooling capacity, while water leaks might point to a clogged drain or a malfunctioning component.
  • Unusual Odors: Foul smells like mustiness or burning could indicate mold growth in the ducts, wire insulation issues, or overheating components. These issues require immediate attention due to potential safety hazards.
  • High Humidity: An AC unit also functions to reduce humidity. If you notice increased humidity levels indoors despite the AC running, it might signal a malfunction in the unit’s dehumidification function.
  • Increased Energy Bills: A sudden spike in energy bills without a change in usage habits could indicate an inefficient AC system struggling to maintain temperature settings.

Regular maintenance can prevent some of these issues, but if you notice any of these signs, it’s advisable to have a professional HVAC technician inspect your AC unit promptly. Timely repairs not only restore proper functioning but also prevent minor issues from escalating into major and costly problems.

How To Clean Your AC Unit

Cleaning your AC unit regularly is crucial for optimal performance and efficiency. If you can’t get an appointment with an HVAC professional right away, a little do-it-yourself (DIY) maintenance can go a long way in keeping your AC unit performing well and in need of minimal repairs.

Here’s a quick guide how to DIY clean your AC unit:

  • Turn Off the Power: Safety first. Switch off the power to your AC unit from the circuit breaker or disconnect switch to avoid any accidents while cleaning.
  • Clean or Replace the Filter: Remove and clean the air filter. Depending on the type, wash reusable filters with mild soap and water or replace disposable ones. Clean filters ensure proper airflow and reduce strain on the system.
  • Clear Debris: Remove leaves, twigs, dirt, and debris around the outdoor condenser unit. Trim foliage and ensure at least two feet of clearance around the unit for proper airflow.
  • Clean the Outdoor Unit: Gently vacuum or brush away dirt and debris from the exterior fins. Be careful not to damage the delicate fins. Use a coil cleaner or mild detergent and water to clean the fins if they are particularly dirty.
  • Straighten Coil Fins: If you notice bent or crushed fins on the outdoor unit, use a fin comb tool to straighten them. This improves airflow through the coils.
  • Clean the Evaporator Coil: Access the indoor unit’s evaporator coil and clean it with a soft brush or a vacuum. Be cautious not to damage the coils or the surrounding components.
  • Check Drainage: Ensure the condensate drain line is clear of clogs. Use a mixture of bleach and water to prevent algae or mold buildup in the drain line.

Professional AC Servicing: What To Expect

When you schedule professional servicing for your AC unit, expect a comprehensive inspection and maintenance process that enhances the system’s efficiency, identifies issues, and ensures performance. 

Here’s what you can anticipate from a professional AC unit servicing:

  • Thorough Inspection: HVAC technicians conduct a detailed examination of both the indoor and outdoor components. They check the thermostat, electrical connections, coils, refrigerant levels, condensate drain, and other vital parts to ensure everything functions correctly.
  • Cleaning and Maintenance: Professionals clean and maintain various components, including replacing or cleaning air filters, clearing debris from the outdoor unit, cleaning the evaporator and condenser coils, straightening coil fins, and ensuring proper lubrication of moving parts.
  • Refrigerant Check: Technicians inspect refrigerant levels and look for any signs of leaks. If necessary, they recharge refrigerant or repair leaks to ensure the proper functioning of the system.
  • Ductwork Inspection: If accessible, technicians may inspect ductwork for leaks, blockages, or damage. Addressing duct issues ensures efficient cooling and prevents air loss.
  • Adjustments and Calibration: Professionals make necessary adjustments to components like fan belts, motors, or thermostats to optimize performance and efficiency. They calibrate settings for accurate temperature control.
  • Identifying Potential Issues: HVAC experts are trained to recognize potential problems that might escalate into major malfunctions if left unaddressed. They provide recommendations for repairs or replacements to prevent future breakdowns.
  • Advice and Tips: Technicians often offer valuable advice on maintaining your system between professional services. They might suggest optimal temperature settings, advice on filter replacement schedules, and tips for energy-efficient usage.

Expect the servicing to be thorough, aiming not just to address existing issues but also to prevent potential problems, ensuring your AC unit operates efficiently and reliably. 

Regular professional servicing not only maintains indoor comfort but also extends the lifespan of your AC system while potentially saving on energy costs.

The Benefits of AC Unit Servicing

Professional AC unit servicing offers numerous benefits that contribute to the system’s efficiency, longevity, and your overall comfort. Some key advantages include:

  • Improved Energy Efficiency: Regular servicing ensures that your AC unit operates at its peak efficiency. Clean filters, calibrated components, and optimized settings reduce energy consumption, leading to lower utility bills.
  • Enhanced Cooling Performance: Proper maintenance, including cleaning coils, checking refrigerant levels, and clearing blockages, ensures that your AC unit cools your space effectively, maintaining consistent and comfortable temperatures indoors.
  • Prevention of Major Breakdowns: Routine inspections allow technicians to identify and address minor issues before they escalate into major problems. Addressing potential problems early can prevent costly breakdowns and repairs.
  • Extended Lifespan of the Unit: Regular maintenance significantly extends the life of your AC unit. Properly serviced units experience less wear and tear, reducing the likelihood of premature failure and the need for early replacements.
  • Improved Indoor Air Quality: Cleaning or replacing filters and clearing ducts during servicing reduces dust, allergens, and pollutants circulating in your home. This leads to better indoor air quality and a healthier living environment.
  • Cost Savings: Although professional servicing incurs a cost, it can save you money in the long term. Reduced energy bills, fewer repairs, and extended lifespan outweigh the cost of occasional servicing.

AC Unit Servicing Cost

If you are new to the world of HVAC servicing, you may be wondering the price of these services.

According to HomeAdvisor, AC unit servicing can cost between $75 to $200 for tune-ups and between $150 to $500 for extensive maintenance. Keeping your AC unit servicing costs low depends on regular maintenance and care, as well as addressing issues as soon as they arise. 

Final Thoughts

Regular AC unit servicing is the key to a cool and trouble-free summer. 

By investing in maintenance, you ensure your AC unit can continue providing optimal performance, energy efficiency, and cool comfort for your home. Stay ahead of potential issues and enjoy a comfortable, worry-free environment throughout the seasons.

Looking for an HVAc Professional in Brentwood, TN?

We are the right choice for all your HVAC needs! Here at Rapid Response, we understand that no two customers are the same and that is why our team of trained professionals will go above and beyond to meet the customized cooling needs of every customer. By choosing us you will receive fair rates, quality work and outstanding service.