The Best Way to Switch from Heating to AC

As winter fades and temperatures start to climb, it’s the perfect time to transition your home from heating to cooling. Making the switch isn’t just about flipping the thermostat from Heat to Cool—a little preparation ensures your air conditioner runs efficiently, keeps energy bills low, and prevents surprise breakdowns during the first hot day of the year.

Here are the best steps to smoothly and safely move your home from heating season to cooling season.

 Change Your HVAC Air Filter

Your HVAC filter has been working hard all winter. A dirty filter restricts airflow and forces your AC to work harder, leading to higher energy costs and more wear on your system.

Swap in a fresh filter before you turn on your AC for the season.

Tip: Check monthly and replace every 1–3 months depending on pets, allergies, and dust levels.

Clear and Inspect Your Outdoor AC Unit

Snow, leaves, and debris can collect around your outdoor condenser during winter.

Do this before first use:

Remove leaves, sticks, and dirt around the unit, and remove the cover if present. Ensure at least 2 feet of clearance around all sides, inspect for visible damage, bent fins, or pest activity. A clean, open unit helps your AC breathe and operate efficiently.

Test the System Early—Don’t Wait for the First Hot Day

Turn your thermostat to Cool and lower the temperature by a few degrees to see how the system responds. Listen for unusual noises, weak airflow, or warm air coming from vents. Testing early gives you time to address issues before you need your AC daily.

If any issues arise, HVAC pros at Plumbline are ready to help. We will be able to fix any issues with your air conditioner before the hot weather hits, and you and your family are huddled around a fan. You can also schedule regular air condition tune-ups to keep your system running at peak performance all summer long. Curious about replacing your HVAC system? Refer to our other help guide, “How Much Would It Cost to Replace my Furnace and AC at the Same Time,” or schedule an appointment with Plumbline, and we’ll send one of our HVAC experts out to help you determine the best system for your home’s needs and give you an upfront price quote.