Your HVAC (Heating, Ventilation, and Air Conditioning) system is one of the most important and expensive components in your home. Proper maintenance keeps your home comfortable, improves energy efficiency, and helps you avoid costly repairs down the road.

Here is what you should know about maintaining your HVAC system and how often you should schedule service.

1. Change Your Air Filters Regularly

Your air filters trap dust, dirt, and allergens from circulating in your home. Over time, they become clogged and force your system to work harder, reducing efficiency and air quality.

How often: Replace filters every 1–3 months, depending on the type of filter and if you have pets or allergies.

2. Schedule Professional HVAC Maintenance

For most households, annual HVAC maintenance is recommended, with a focus on spring for air conditioning and fall for heating systems. This timing ensures your system is prepared for peak usage during extreme temperatures.

If you have an older system, use it frequently, or have pets, consider scheduling service twice a year. This additional care can help prevent breakdowns and extend the life of your equipment.

During a tune-up, an HVAC technician will check refrigerant levels, clean coils, inspect ductwork, test thermostats, and make sure all components are functioning properly.

3. Keep Outdoor Units Clear

Your outdoor condenser unit needs proper airflow to function efficiently. Leaves, grass clippings, and other debris can block airflow and cause your system to overheat.

Trim back vegetation at least 2–3 feet around the unit.
Gently rinse off dirt and dust with a garden hose a couple of times a year.

4. Clean Air Vents and Ducts

Blocked vents can restrict airflow and make your HVAC work harder.

Vacuum vents and registers regularly.
Schedule professional duct cleaning every 3–5 years or sooner if you notice dust buildup or reduced airflow.

5. Monitor Your Thermostat

Upgrading to a programmable or smart thermostat can help your system run more efficiently.

Set temperatures higher when you are away in summer and lower when you are gone in winter.

6. Watch for Warning Signs

Strange noises, inconsistent temperatures, higher energy bills, or weak airflow can all indicate that your HVAC system needs attention. Do not wait until it breaks down. Call a professional as soon as you notice a problem.

Why Regular Maintenance Matters

Consistent HVAC maintenance helps:

Improve indoor air quality
Lower monthly energy bills
Extend the lifespan of your system
Reduce the risk of emergency breakdowns

By scheduling professional maintenance once a year in the spring or fall and twice a year if your system is older or works harder you can protect your investment and enjoy a comfortable home year-round.

My Interview with Julio from Heritage HVAC

Pro tip: If you are planning to sell your home, having a well-maintained HVAC system is a big plus for buyers. Keeping a record of your maintenance visits shows potential buyers that you have taken good care of the property.

How to Maintain Your HVAC System and Keep It Running Efficiently