Updated June 2026
When temperatures rise, your HVAC system has to work overtime to keep your home cool. The good news? With a few smart steps, you can improve comfort, reduce energy use, and avoid mid-summer breakdowns. Use this HVAC summer checklist to help keep your system running efficiently and your home feeling just right, even in extreme heat.
1. Change Your Air Filter Regularly
A clogged filter is one of the biggest causes of poor HVAC performance.
How to do it:
Locate your air filter (usually in a return vent or near your indoor unit).
Slide it out and hold it up to the light. If you can't see through it, it's time to replace it.
Insert a new filter with the airflow arrows pointing in the correct direction.
Set a reminder to check it monthly and replace it every three months.
Why it matters: A clean filter improves airflow, boosts indoor air quality, and helps your system cool more efficiently, making it one of the simplest energy-saving tips for summer HVAC performance. For a deeper look at how your system works, check out our Ultimate HVAC Guide.
2. Schedule an HVAC Summer Tune-Up
Routine maintenance is essential for keeping your system in peak condition.
How to do it:
Book a professional HVAC summer tune-up before or early in the season.
Ask for a full system inspection, including refrigerant levels, electrical components, and a thermostat calibration.
Keep a record of annual maintenance visits.
Why it matters: Regular HVAC summer tune-ups help prevent unexpected breakdowns and ensure your system runs as efficiently as possible during the hottest months. Staying on top of maintenance is one of the most effective energy-saving tips for summer HVAC owners.
3. Set Your Thermostat the Right Way
What should my HVAC thermostat be set at in summer?
Recommended settings:
75–78°F when you're home
80–85°F when you're away
How to do it:
Adjust your thermostat manually or install a programmable/smart thermostat.
Set schedules that automatically raise the temperature when you're out and lower it before you return.
Keep the fan setting on "auto" for better efficiency.
Why it matters: Proper thermostat settings balance comfort and energy savings while reducing strain on your HVAC system. Not sure what else to watch for when temps soar? See our Extreme Heat Tips for more ways to stay cool.
4. Don't Turn Your AC Off Completely
Is it cheaper to run your AC all day? Not necessarily, but turning it off entirely isn't the best strategy either.
What to do instead:
Raise the temperature while you're away instead of shutting the system off.
Try to keep indoor temperatures within 10–15 degrees of the outdoor temperature.
Why it matters: Turning your AC off can allow heat and humidity to build up, forcing your system to work harder when it turns back on, which leads to higher energy use and added wear.
5. Keep Windows and Doors Closed
Open windows let cool air escape and hot, humid air enter.
How to do it:
Keep windows and exterior doors closed when your AC is running.
Check for drafts and seal gaps with weatherstripping or caulk.
Use blinds or curtains during peak sunlight hours to block heat.
Why it matters: Keeping your home sealed helps maintain a consistent indoor temperature and is one of the most overlooked energy-saving tips for summer HVAC efficiency.
6. Upgrade to a Programmable Thermostat
A programmable thermostat makes managing your cooling schedule effortless.
How to do it:
Choose a programmable or smart thermostat compatible with your system.
Install it according to the manufacturer's instructions or have it professionally installed.
Program daily schedules based on when you're home, asleep, or away.
Why it matters: Automating temperature changes reduces energy waste without sacrificing comfort, and it pairs perfectly with a seasonal HVAC maintenance plan to maximize efficiency all summer long.
7. Seal Your Ductwork
Leaky ducts can waste a significant amount of cooled air.
How to do it:
Inspect visible ductwork for gaps, loose connections, or damage.
Use foil tape (not duct tape) to seal small leaks.
For a more thorough solution, schedule professional duct sealing.
Why it matters: Sealing ducts improves airflow, increases efficiency, and ensures cool air reaches every room in your home.
8. Keep Your Outdoor Unit Clean
Your AC's outdoor unit needs proper airflow to function effectively. It's important to keep the area around the outdoor unit clear.
How to do it:
Turn off power to the unit.
Clear away leaves, dirt, and debris.
Trim shrubs and plants at least 2 feet around the unit.
Gently rinse the coils with a garden hose.
Why it matters: A clean unit allows your system to release heat more efficiently, improving cooling performance. This simple step is a key part of any HVAC summer checklist.
9. Consider Upgrading Older Equipment
If your system is outdated, it may be costing you more than you think.
How to do it:
Check the age of your HVAC system (typically found on the unit label).
If it's 10+ years old, request an evaluation from a professional.
Look for ENERGY STAR®-certified systems for improved efficiency.
Why it matters: Newer HVAC systems are designed to use less energy while delivering better performance, saving you money over time.
When to Call a Professional
While many items on this HVAC summer checklist are easy to handle yourself, some tasks require a deeper level of expertise. Working with electrical components, refrigerant, or advanced system diagnostics can be complex and should be handled by experienced professionals to avoid potential damage or safety concerns.
That's where ARS can help. Our trained, skilled professionals provide thorough inspections, maintenance, and repairs to keep your system running at peak performance. Whether you need a seasonal tune-up or are considering an upgrade, we're here to help you stay cool and comfortable all summer long.
Ready to get started? Call ARS®/Rescue Rooter® or schedule your appointment online today.
