Your HVAC system works hard year-round to keep your home comfortable through the heat of summer and the chill of winter. But without regular seasonal maintenance, its performance can decline—leading to higher energy bills, unexpected breakdowns, and reduced indoor comfort.

To help homeowners get the most out of their heating and cooling systems, we’ve created a seasonal HVAC maintenance checklist. Follow this guide to ensure your system runs efficiently and reliably in every season.

Why Seasonal HVAC Maintenance Matters

Just like a car needs routine service to operate at its best, your HVAC system benefits from seasonal checkups. Regular maintenance helps:

• Improve energy efficiency

• Extend equipment lifespan

• Prevent costly repairs

• Ensure consistent indoor comfort

• Maintain good indoor air quality

Spring & Summer HVAC Maintenance Checklist

As temperatures rise, your air conditioner takes center stage. Prepare your system for warm weather with these essential steps:

Replace or Clean Air Filters

Clogged filters restrict airflow and force your system to work harder. Replace or clean filters every 1–3 months.

Clean the Outdoor Unit

Remove leaves, dirt, and debris from around the condenser. Trim vegetation at least 2 feet away to allow proper airflow.

Inspect Ductwork for Leaks

Leaky ducts can reduce system efficiency by up to 30%. Have them inspected and sealed if needed.

Check Refrigerant Levels

Low refrigerant can lead to poor cooling and system damage. A professional can top it off and fix any leaks.

Test Thermostat Settings

Ensure your thermostat is calibrated correctly and set to an energy-efficient schedule.

Schedule Professional AC Tune-Up

Have a licensed HVAC technician inspect coils, fans, motors, and electrical components for optimal summer performance.

Fall & Winter HVAC Maintenance Checklist

Before cold weather hits, your heating system needs attention to ensure safe and efficient operation:

Replace Air Filters (Again!)

Clean filters are just as important in the winter to maintain airflow and indoor air quality.

Inspect Furnace or Heat Pump

Look for signs of wear, rust, or unusual noises. If your furnace is older, a tune-up is a must.

Clean Vents and Registers

Dust and vacuum your vents to promote clean airflow and reduce allergens.

Check Carbon Monoxide Detectors

If you use a gas furnace, test your carbon monoxide detector and replace batteries.

Seal Windows and Doors

Prevent heat loss by sealing any gaps around windows and doors with weatherstripping or caulk.

Schedule a Professional Heating Inspection

A technician can verify that all components are in good working order and that there are no safety hazards.

Bonus Tips for Year-Round HVAC Health

• Keep the area around indoor units clear of furniture, curtains, or obstructions.

• Install a programmable or smart thermostat to optimize energy use.

• Inspect insulation in attics or crawl spaces to maintain temperature control.

Final Thoughts

Routine seasonal maintenance keeps your HVAC system running at peak performance, improves efficiency, and helps you avoid expensive repairs. Best of all, it ensures your home stays comfortable no matter the weather.

Ready to schedule your seasonal HVAC tune-up? Contact KAC Express today for expert maintenance services that keep your system running smoothly all year long.