Should You Get Your AC System Checked Before Turning on the Heat This Fall?

As Florida finally cools down after months of heat and humidity, many homeowners are ready to switch off the AC and turn on the heat. But before you flip the thermostat, there’s an important question:

Should you get your AC system checked before turning on the heat? 

Yes - and here’s why.

This quick check can keep your system running safely, efficiently, and ready for the first cool autumn night. It’s one of the easiest ways to prevent breakdowns, lower your energy bill, and protect your comfort all season long. 

WHY A FALL SYSTEM INSPECTION MATTERS 

Even though your AC has worked hard all summer, your heating components including your heat strips have been sitting idle. That makes fall the ideal time for a full HVAC tune-up, before small issues turn into big repairs or fire risks. Here is what a fall check does for you and your system: 

  • Catches wear and tear from summer’s heavy use 
  • Improves efficiency and lowers electric bills
  • Ensures clean airflow and better indoor air quality
  • Confirms your heating mode works properly before cold weather hits 
  • Cleans the dust off your heat strips so you don’t have a fire risk or smell burning the first time you turn it on

Here in Jacksonville, St. Augustine, and Ponte Vedra, we don’t see freezing temps often but those first chilly mornings always catch homeowners by surprise. A quick tune-up makes sure your system switches from cooling to heating without a hitch.

WHAT TECHNICIANS CHECK DURING A FALL TUNE-UP

When you schedule a professional HVAC inspection with Donovan, your technician will: 

  • Check defrost cycle
  • Adjust air volume for maximum efficiency 
  • Check reversing valve operation 
  • Check safety devices
  • Check electrical components for tightness 
  • Lubricate as needed
  • Check the blower door for tension and alignment
  • Check for oil leaks
  • Test electrical controls for proper operation
  • Check for refrigerant leaks
  • Check refrigerant controls
  • Check refrigerant coil
  • Clean coil in place with certified coil cleaner
  • Check condensate drain
  • Check thermostat operation 
  • Conduct visual duct inspection
  • Check supply voltage/amp draw
  • Wax outside unit 
  • Perform static pressure test for duct work
  • Vacuum inside unit 
  • Check and replace filters as needed (owner provided)

This service helps extend your system’s lifespan and gives you peace of mind that everything is ready for cooler weather.

Before Donovan HVAC Tune-Up
After Donovan HVAC Tune-Up

Common Problems Found After Summer

After running nonstop during Florida’s hot, humid months, your AC system may have hidden issues such as:

  • Clogged or slow drain lines
  • Weak airflow from dirty coils or filters
  • Electrical wear from summer storms and lightning
  • Low refrigerant or system strain
  • Rust or corrosion, especially near the ocean or river

Catching these problems early keeps your system efficient and reliable year-round.

NE Florida-Specific Insight: Your AC is your heat 

Unlike northern homes with separate furnaces, most Florida homes use heat pumps, which handle both heating and cooling. That means your AC system doesn’t take the winter off, it simply switches functions. Keeping it well-maintained in the fall ensures both your heating and cooling modes work properly when you need them most.

When to schedule your HVAC Tune-Up

The best time to schedule your fall tune-up is October through December, before the first cold snap. Two system checks each year are recommended:

  • Spring: before heavy AC use
  • Fall: before switching to heat

Routine maintenance helps to prevent 80% of HVAC breakdowns and keeps your warranty valid. 

Quick Homeowner Checklist Before Your Appointment

You can help your system (and your tech!) by:

  • Having air filters on site for us to change
  • Making sure vents are open and unobstructed
  • Clearing debris around your outdoor unit
  • Noting any odd smells, sounds, or thermostat issues
  • Noting any air quality or comfort concerns like humidity or recent changes in how the home feels

Bottom Line

A fall HVAC inspection isn’t just “nice to have”, it’s one of the most valuable home maintenance steps you can take in Florida. It protects your comfort, your pockets, and your system’s lifespan, all for less than the cost of a single repair. 

Don’t wait for the first cold morning to find out your system won’t switch to heat. Schedule your tune-up today with Donovan Air, Electric & Plumbing, trusted in NE Florida since 1987. 

Call 904-241-3785 or book online to secure your appointment. 

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