Change the air filters: Clean filters keep the air in your home healthy and maintain an HVAC system’s efficiency. Follow the manufacturer’s recommendations regarding the frequency of changing or cleaning your unit’s filters. If it’s been a while since you changed them, now is a good time for a replacement. The U.S. Environmental Protection Agency recommends replacing the filter at least every three months.
Turn on the air conditioner: Turn on the A/C for a test run to learn if there are any issues that a professional should address before temperatures rise.
Install or set a programmable thermostat: A programmable thermostat is an energy saving tool that sets the HVAC unit to the ideal temperature throughout the day. You can set it, for example, to begin cooling your home just as you get off work so it feels comfortable when you arrive. With smart thermostats, you can control the temperature from a smartphone or computer. You can purchase a programmable thermostat at a home improvement store and many models are simple to install without professional help
Clean the outdoor area surrounding HVAC unit: Sweep away fallen leaves, branches, dirt, and debris around an outdoor HVAC system. Similarly, cut back bushes, grass, and other plants so they don’t touch or crowd it. Maintain your landscaping by gently rinsing away dirt and debris on the A/C unit’s condenser coils with a garden hose. The coils can be found on the exterior part of the unit.