How to Maintain Your HVAC System So It Will Last Longer (Part 2)

Maintaining your HVAC system is essential to ensure its optimum performance and longevity. In part one, we discussed the importance of regularly changing air filters, checking for leaks, and cleaning the exterior unit. This part will cover more maintenance steps to keep your system running smoothly.

Clear Debris from your System

Outdoor HVAC units are exposed to the elements, and debris such as leaves, twigs, and grass clippings can accumulate around the unit, obstructing airflow and reducing efficiency. To prevent this, clear the area around the AC unit of debris, at least two feet in all directions. You can use a broom or a garden hose to remove dirt and debris from the Air conditioning unit’s fins. However, be careful not to bend or damage them, which can affect the unit’s overall performance.

Lubricate all Moving Parts

The moving parts in your HVAC system, such as bearings and motors, require lubrication to function correctly. Over time, the lubrication can break down, causing friction, leading to increased energy consumption and reduced efficiency. To prevent this, lubricate all moving parts annually, as the manufacturer recommends.

To lubricate the HVAC system:

  1. Turn off the power supply and remove the caps covering the bearings or motors.
  2. As the manufacturer recommends, apply a few drops of oil to each port or bearing.
  3. Wipe off any excess oil and replace the caps.

Vacuum Registers, Grilles, and Diffusers

Registers, grilles, and diffusers are crucial components of your HVAC system that help distribute air throughout your home. However, dust and debris can accumulate on these components, reducing airflow and indoor air quality. To prevent this, vacuum these components as part of your routine maintenance.

To vacuum registers, grilles, and diffusers, remove the covers and use a brush attachment on your vacuum cleaner to remove any dust and debris. If there is a significant buildup, wash the covers with soap and water and let them dry before reattaching them.

Check Electrical Connections

Electrical connections in your HVAC system can loosen over time, leading to increased energy consumption and even system failure. To prevent this, check all electrical connections regularly and tighten any loose connections.

To check the electrical connections:

  1. Turn off the power supply and remove the access panel.
  2. Inspect the wires and connections for any signs of wear or damage.
  3. If you find any loose or damaged connections, tighten or replace them as necessary.

However, if you are not experienced in handling electrical components, it is best to call a professional HVAC technician.


HVAC systems are expensive but can last for years with regular maintenance and care. The tips we shared in parts one and two should help you maintain your HVAC system and keep it running smoothly. It is important to note that many HVAC systems have different maintenance needs. If you’re unsure how to maintain your system properly, it is best to consult a professional before undertaking any repairs or maintenance tasks.

Keep your indoor air quality at its best with regular HVAC maintenance from Legacy Heating. Our thorough cleaning and inspection services will remove dust, dirt, and other contaminants from your system, ensuring you and your family breathe clean and healthy air. Schedule your appointment today and enjoy a healthier home!

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