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A Seasonal Maintenance Schedule for Cleaning Evaporator Coils

As the seasons change, your HVAC system plays a crucial role in maintaining a comfortable indoor environment. From keeping your space cool in the scorching summer heat to providing warmth during chilly winters, your HVAC system is a year-round ally. Amidst the intricate network of components within this system, one often-overlooked yet critical element stands out—the evaporator coil.


Why Should You Prioritize Cleaning Evaporator Coils?

Evaporator coils are vital for the heat exchange process in your HVAC system. Over time, these coils accumulate dirt, dust, and debris, hindering their ability to absorb heat effectively. This not only reduces the system’s efficiency but can also lead to increased energy consumption and potential breakdowns. A proactive approach to cleaning evaporator coils ensures your HVAC system operates at peak performance.


Failing to clean evaporator coils can lead to reduced efficiency, decreased cooling capacity, frozen coils, poor indoor air quality, system breakdowns, and increased maintenance costs. Regular maintenance, including cleaning the evaporator coils, is essential for preserving the performance and longevity of your HVAC system.


Seasonal Maintenance Schedule

Winter (December – February)
  • Replace the air filter to maintain clean indoor air quality.
  • Check for any unusual noises or vibrations during system operation.
  • Insulate exposed pipes to prevent freezing in colder climates.
  • Ensure that vents and registers are unblocked for efficient airflow.
  • Consider scheduling a post-winter professional maintenance check for a thorough examination.


Spring (March-May)
  • Begin the season by turning off the HVAC system and cutting power to the unit.
  • Remove debris around the outdoor unit, ensuring unobstructed airflow.
  • Inspect the condensate drain line for clogs and clear any blockages.
  • Clean or replace the air filter to enhance overall system efficiency.
  • Use a soft brush or vacuum to gently clean the evaporator coil surfaces, removing accumulated dirt and debris.


Summer (June – August)
  • Check the refrigerant levels and top up if necessary to maintain optimal performance.
  • Monitor the thermostat settings and calibrate if needed for energy efficiency.
  • Trim vegetation around the outdoor unit to prevent airflow obstruction.
  • Inspect the insulation on refrigerant lines for wear and tear.
  • Regularly check for water leaks around the unit, addressing any issues promptly.
Fall (September – November)
  • Inspect the entire HVAC system for visible signs of wear and tear.
  • Clean the area around the outdoor unit as leaves and debris may have accumulated.
  • Seal any gaps or leaks in the ductwork to prevent energy loss.
  • Verify that the thermostat is correctly set for the heating season.
  • Schedule a professional HVAC inspection for a comprehensive checkup.



Regular maintenance of evaporator coils is a small investment that pays off in improved HVAC efficiency and longevity. By following this seasonal maintenance schedule, you’ll not only ensure a comfortable indoor environment but also reduce energy costs and prevent costly repairs. Make the most of your HVAC system by incorporating these simple yet effective practices into your seasonal routine.


Managing HVAC maintenance may appear overwhelming, but fear not! Manuel & Sons, your dependable HVAC technicians in San Antonio, are here to simplify the process for you. With our maintenance contract, you’ll receive a hassle-free spring and fall HVAC Tune-Up, ensuring your system’s durability for the upcoming seasons. Say goodbye to the worries of HVAC maintenance—sign up today and welcome a contented HVAC system into your home!

author avatar
Fabby Escamilla

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