Spring cleaning isn't just for closets and windows. Your HVAC system needs seasonal attention too — here's a complete spring checklist.

Spring is the ideal time to give your HVAC system the attention it needs before the summer cooling season begins. Here's a complete spring HVAC checklist — what you can do yourself and what's worth calling a professional for.

DIY Spring Tasks

Replace the air filter: If you haven't changed it since fall, now is the time. Start the cooling season with a fresh filter.

Clean supply and return vents: Remove vent covers and vacuum out accumulated dust. Wipe the covers clean before reinstalling.

Clear the outdoor unit: Remove any debris (leaves, dirt, vegetation) that accumulated around the outdoor condenser unit over winter. Trim any vegetation to maintain at least 2 feet of clearance on all sides.

Gently clean the condenser fins: Using a garden hose on a gentle setting, rinse the condenser coil fins from the inside out to remove dust and debris. Don't use a pressure washer — it can bend the fins.

Check the condensate drain: Pour a cup of diluted bleach or white vinegar into the drain line access port to prevent algae buildup before cooling season.

Test the system: Turn on the AC and verify it's cooling properly. Check that all vents are delivering cool air and that the thermostat is responding correctly.

Check CO and smoke detectors: Test batteries and replace if needed.