Spring & Summer HVAC Maintenance Guide for Homeowners

As temperatures rise, your HVAC system plays a crucial role in keeping your home comfortable. Proper maintenance before the heat sets in ensures efficiency, reduces energy costs, and extends the life of your system. This guide will walk you through essential steps to service your HVAC system for the spring and summer months.

1. Replace or Clean Air Filters

One of the simplest yet most important tasks is replacing or cleaning your air filters. A dirty filter restricts airflow, forcing your system to work harder and reducing efficiency. Check your filter every 30–60 days and replace it if it appears dirty. If you have a reusable filter, wash it according to the manufacturer’s instructions.

2. Clean and Inspect the Outdoor Unit

Your outdoor condenser unit is exposed to dirt, debris, and weather conditions year-round. To ensure optimal performance:

Turn off the power before performing any maintenance.
Remove leaves, dirt, and debris from around the unit.
Clean the coils using a garden hose (avoid high pressure) and coil cleaner if needed.
Straighten bent fins using a fin comb to maintain proper airflow.

3. Check the Thermostat

Test your thermostat by setting it to cooling mode to ensure it responds correctly.
See step 7 for testing proper cooling function
If you have a programmable thermostat, adjust your schedule for summer to optimize efficiency.
Consider upgrading to a smart thermostat to maximize energy savings.

4. Inspect and Clean Air Vents and Registers

Remove dust and debris from vents using a vacuum or damp cloth.
Make sure furniture or curtains aren’t blocking airflow.
If necessary, remove the vent covers and clean inside the duct openings.

5. Check and Clear the Condensate Drain Line

Your HVAC system removes moisture from the air, and that condensation drains through a dedicated line. A clogged drain can cause water leaks and system malfunctions.

Locate the condensate drain line (usually a PVC pipe near the indoor unit).
Check for blockages—if water isn’t dripping from the drain when the AC runs, it may be clogged.
Flush the line by pouring a cup of vinegar or a diluted bleach solution into the drain opening to kill algae and mold buildup.
If the clog persists, use a wet/dry vacuum to suck out any debris from the drain line.

6. Check Refrigerant Levels and Lines

Low refrigerant levels can indicate a leak or inefficiency in the system. While checking refrigerant requires a professional, you can inspect refrigerant lines for signs of wear, leaks, or frost buildup. If you suspect a problem, contact an HVAC technician.

7. Test System Performance

Run your AC for a short period before the hottest days arrive.
After switching your thermostat from heating to cooling give your system about 30 minutes to switch over.
Ensure cool air is blowing consistently and the system cycles properly.
Listen for unusual noises like grinding or rattling, which may indicate a mechanical issue.

8. Schedule Professional Maintenance

While DIY maintenance goes a long way, scheduling a professional HVAC tune-up ensures your system runs at peak efficiency. A technician will:

Inspect and clean internal components.
Check refrigerant levels.
Test electrical connections and controls.
Lubricate moving parts for smooth operation.

Final Tips for Efficiency & Longevity

Use ceiling fans to circulate air and reduce the strain on your AC.
Keep blinds and curtains closed during peak sun hours to reduce heat gain.
Seal windows and doors to prevent air leaks and improve cooling efficiency.

By taking these proactive steps, you’ll ensure your HVAC system is ready to handle the heat while keeping your home comfortable and energy-efficient.