How to Prepare Your HVAC System for Vacation or Extended Absence

Are you planning a getaway, or will your business be closed for a stretch? The last thing anyone wants is to return to a home or office that’s stuffy, humid, or—worse—damaged by temperature swings. At Matlock HVAC, we know your HVAC system doesn’t get a vacation, but it can work smarter while you’re away.

With a few proactive steps, you can avoid big energy bills, musty odors, and even prevent costly repairs. Let’s make sure your system is ready for your absence—so you can actually relax while you’re gone.

Why Prepare Your HVAC for Absence? 🏡

When you lock the door and drive away, your HVAC quietly becomes your property’s bodyguard. If you leave it running like you’re still there, it burns energy for empty rooms. Switch it off entirely, and you risk mold, frozen pipes, or damaged electronics.

Think of your HVAC as a thermostat-controlled shield. It keeps everything stable—just right, not too hot or cold. Preparing it for your trip helps:

• Prevent expensive surprises (like burst pipes or warped floors)
• Keep indoor air from getting stale or musty
• Slash unnecessary energy use

The U.S. Department of Energy recommends adjusting your system before an extended absence to strike the right balance between savings and protection.

Ideal Settings for Vacation

Should you turn your system off, or leave it running? The answer depends on the season and your goals.

For Summer Trips

• Set your thermostat higher, not off. Aim for 80–85°F. This keeps humidity and mold in check without cooling empty rooms.
• Use a programmable or smart thermostat to set a schedule. Some models let you adjust settings remotely—handy if travel plans change.
• Close curtains and blinds to block direct sun and help your system work less.

For Winter Absences

• Never turn heat off completely. Keep it at least 55°F to prevent pipes from freezing.
• Open interior doors so warm air circulates to every corner, especially rooms with plumbing.
• Consider a low-temperature alarm or smart thermostat that alerts you if temps drop dangerously.

Read more about setting up your system on our thermostats service page.

Preventing Damage and Energy Waste

Your HVAC is like a watchful caretaker while you’re gone, but it needs a little help. Here’s how to set it up for success:

• Replace filters. A clogged filter makes your system work harder and can send dust into every room.
• Check for leaks and blockages. Walk your home and look for blocked vents or registers. Make sure nothing is stacked in front of them.
• Run a quick maintenance check. Listen for odd noises, and double-check thermostat batteries.
• Unplug unnecessary electronics to limit phantom loads (and reduce fire risk).

If your system is due for its annual checkup, it’s smart to schedule HVAC maintenance before you leave. A professional can spot small issues before they become big headaches.

Quick Safety Checklist 📝

Before you go, run through this list:

• Set thermostat to vacation mode or away setting
• Ensure all windows and doors are tightly closed
• Replace or clean HVAC filters
• Clear vents and registers
• Test your smoke and carbon monoxide detectors
• Unplug electronics not in use

DIY vs. Call a Pro

Some steps are easy to handle yourself. Swapping filters, setting the thermostat, and checking for closed vents are quick wins. But if you notice:

• Loud noises or strange odors
• Poor airflow in parts of your home
• A system that just won’t turn on

It’s a good idea to call in a technician before you leave. Professional eyes can spot worn belts, low refrigerant, or electrical issues that could become emergencies if left unchecked.

What Pros Check On Arrival

If you book a maintenance visit before your trip, a technician will:

• Inspect and clean coils, fans, and drain lines
• Test all safety controls and electrical connections
• Look for leaks in the refrigerant or ductwork
• Calibrate thermostat settings for optimal performance
• Recommend upgrades for indoor air quality, like Humidifiers near you or air scrubbers if needed

Signs of Trouble After Returning

Walking back in, trust your senses:

• Does the air feel damp or musty?
• Are there water stains, condensation, or an unusual odor?
• Is your system struggling to reach the right temperature?

If you answer “yes” to any of these, your HVAC might need a closer look.

Post-Trip System Checks 🔎

After your return, give your system a once-over:

• Inspect filters and change if needed
• Listen for any rattling or hissing
• Look for thermostat errors or blinking lights
• Open all vents and registers again
• Monitor your utility bill for sudden spikes

If something’s off, don’t wait—address small issues before they become big ones.

Prevention & Maintenance: Year-Round Habits

Vacation prep is just one part of smart HVAC ownership. Regular maintenance keeps your system running efficiently all year.

• Schedule annual professional maintenance
• Replace filters every 1–3 months
• Keep vents and returns clear
• Watch for seasonal changes—heavy pollen, humidity, or cold snaps

Even if you’re not going away, these habits protect your investment and keep air fresh.

Seasonal Considerations

Winter brings frozen pipes; summer brings humidity and mold risk. If you’re planning a trip during extreme weather, consider:

• Adding a dehumidifier or humidifier for better control
• Using smart sensors to monitor temperature and humidity
• Asking a neighbor to check your home, or install remote alerts

Businesses, especially, can benefit from routine indoor air quality checks and system balancing.

Common Mistakes People Make

• Turning off the system completely. This can lead to condensation, mold, or frozen pipes.
• Forgetting to change filters. Dirty filters choke airflow and stress your HVAC.
• Ignoring old thermostats. Outdated models can’t adjust to changing weather or alert you to trouble.

When It’s an Emergency

Sometimes, despite your best prep, things go wrong—a power outage, a leaking pipe, or an AC that won’t restart. Matlock HVAC offers 24 hour emergency service, so you’re never stranded. Local support is available for those in the Hickory area, all year round.

Timeline & Disruption

Prepping your HVAC for vacation doesn’t take long. Most homeowners can complete a checklist in under an hour. Schedule professional maintenance a week or two ahead of your trip, just in case parts are needed or issues pop up.

Materials and Equipment

Keep these on hand:

• Fresh air filters (check your system size)
• Batteries for thermostats and alarms
• A programmable or smart thermostat
• Surge protectors for sensitive electronics

Frequently Asked Questions

Should I leave my HVAC running if I’m gone for a month?
Yes, but adjust the settings. Don’t shut it off. Set to 80–85°F in summer or 55°F in winter.

What about pets or indoor plants?
If you have living things inside, err on the side of caution and keep temperature and humidity stable.

Is professional maintenance worth it before a trip?
Absolutely—especially if your system is older, or if you’ll be away for more than a week.

Final Thoughts

Taking a vacation should be easy on your mind and your wallet. With a few simple steps, your HVAC system can help protect your property, save energy, and ensure a fresh welcome home.

Call Matlock HVAC now — or reach us anytime at  844-484-6545 .