
The holidays are a time for gathering with family and friends, enjoying festive meals, and making memories at home. But before your guest rooms are ready and your holiday decorations are up, there is one important item to add to your seasonal checklist: your heating and air conditioning system.
In St. Augustine and throughout Northeast Florida, temperatures can shift quickly from warm afternoons to chilly evenings. Your HVAC system needs to be ready to keep your home comfortable when those cooler days and nights arrive.
Whether you’re hosting Thanksgiving dinner, welcoming out-of-town guests, or preparing for the winter season, a few simple HVAC checks can help you identify potential problems before they become holiday headaches.
Here are five things every homeowner should check before the holidays.
1. Check and Replace Your HVAC Filter
A dirty air filter is one of the most common—and easiest to overlook—causes of HVAC performance problems.

Your system relies on proper airflow to heat and cool your home efficiently. When a filter becomes clogged with dust, pet hair, and other debris, airflow can become restricted. This can make your system work harder than necessary and may affect indoor comfort.
What to do:
- — Check your air filter and replace it if it looks dirty.
- — Follow the manufacturer’s recommendations for the appropriate filter type and replacement schedule.
- — If you have pets, allergies, or a particularly dusty home, check your filter more frequently.
A clean filter is a simple step toward better airflow and a more comfortable home for your family and holiday guests.
2. Test Your Heating System Before the First Cold Snap
In Northeast Florida, air conditioning often gets most of the attention throughout the summer. That means your heating system may have gone months without being used.
Don’t wait until the first chilly night—or the arrival of your holiday guests—to discover that your heat isn’t working properly.

What to do:
- — Set your thermostat to heat and raise the temperature a few degrees above the current room temperature.
- — Allow the system a few minutes to respond, following the manufacturer’s operating instructions.
- — Listen for unusual noises and check whether warm air begins coming through the vents.
- — If the system doesn’t respond, or you notice persistent unusual odors or sounds, schedule a professional inspection.
If you have a heat pump, remember that it provides both heating and cooling. Making sure it operates correctly in both modes is especially important as the seasons change.
A little preparation now can help prevent an uncomfortable surprise when temperatures drop.
3. Inspect Your Thermostat and Temperature Settings
Your thermostat plays a major role in maintaining a comfortable home while helping you manage energy use.
Before the holidays, make sure it is working properly and set up for your household’s seasonal routine.
What to do:
- — Replace the thermostat batteries if needed.
- — Confirm that the thermostat is set to the correct mode and temperature.
- — Check programmable schedules to ensure they reflect your holiday plans.
- — Keep the thermostat away from heat-producing appliances, direct sunlight, and other sources that could affect its readings.
If you’re expecting a full house, remember that additional people cooking, moving around, and gathering in one room can affect indoor temperatures. You may need to make small adjustments to keep everyone comfortable.
Avoid frequent, dramatic temperature changes. A reasonable, consistent setting can help maintain comfort without unnecessary adjustments.
4. Check Your Vents and Outdoor HVAC Unit
Your HVAC system needs adequate airflow both inside and outside your home.
Inside, furniture, rugs, curtains, and holiday decorations can accidentally block supply vents or return-air grilles. Outside, leaves, grass clippings, and other debris can collect around your outdoor unit.
What to do:
- — Make sure supply vents and return-air grilles are not blocked by furniture or decorations.
- — Remove loose leaves and debris from around your outdoor unit.
- — Keep vegetation and other obstructions clear of the unit according to the manufacturer’s clearance recommendations.
- — Make sure the outdoor unit is not covered or enclosed in a way that restricts airflow.
Good airflow helps your HVAC system operate as intended. Before rearranging furniture for holiday gatherings or setting up outdoor decorations, take a quick look around your vents and equipment.
Never open electrical panels or attempt repairs on HVAC components yourself. Leave equipment servicing and electrical issues to a qualified professional.
5. Schedule Preventive HVAC Maintenance
The final check is one of the most valuable: make sure your HVAC system is properly maintained.
Even if your system seems to be working normally, routine professional maintenance can help identify developing issues, maintain performance, and reduce the likelihood of unexpected breakdowns.
During a maintenance visit, an HVAC professional can inspect key components, check system operation, and identify concerns that may need attention before colder weather arrives.

Why schedule maintenance before the holidays?
- — Help identify potential problems before your home fills with guests.
- — Support reliable heating and cooling performance.
- — Address maintenance needs that may affect airflow or efficiency.
- — Get professional advice on caring for your HVAC system.
It’s also a good time to ask about your system’s overall condition, any recommended repairs, and the best maintenance schedule for your home.
Planning ahead can make a difference, especially when holiday schedules are already packed.
And remember, if your system is making unusual noises, struggling to maintain a comfortable temperature, or simply due for a checkup, don’t wait until the next cold front to address it. Call Glacier Heating and Air at (904) 540-8199 to schedule your seasonal HVAC maintenance today or visit glacier-hvac.com!
