How to Prepare Your AC for Summer in Illinois
February 2026 — B and W Heating and Cooling
Spring is the perfect time to get your air conditioning system ready for the hot Illinois summer. Taking a few simple steps now can prevent breakdowns during the hottest days of the year and keep your energy bills under control.
Replace your air filter
A fresh filter at the start of the cooling season ensures good airflow and better air quality. Check the filter size printed on the old filter and replace it with the same size.
Clear debris from your outdoor unit
Winter can leave leaves, sticks and other debris around your outdoor condenser unit. Clear a two-foot radius around the unit and gently clean the fins with a garden hose.
Check your thermostat
Switch your thermostat to cooling mode and set it to a temperature below the current room temperature. You should hear the system start within a few minutes.
Listen for unusual sounds
When your AC first starts up in spring, listen for any unusual banging, rattling or squealing. These sounds can indicate a problem that should be addressed before the peak of summer.
Schedule a professional tune-up
A professional AC tune-up from B and W Heating and Cooling includes checking refrigerant levels, cleaning the coils, inspecting electrical connections and testing the full system.