When Phoenix summer temps push past 110°F, your air conditioner becomes the hardest-working appliance in your home, and your energy bill shows it. The average Arizona household pays $200–$450 per month on electricity in summer, with AC accounting for up to 60–70% of that total. The good news? A few simple habits can make a real dent in those costs without sacrificing your comfort.
Set Your Thermostat to 78°F (Really)
It sounds warm, but the U.S. Department of Energy recommends 78°F as the sweet spot for Phoenix homes. Every degree you drop below that adds about 3% to your cooling costs. If you’re leaving the house, bump it up to 85°F. Your system will use far less energy maintaining a warm home than starting from 90°F+ when you get back.
A smart thermostat makes this effortless. Devices like the Ecobee or Nest can learn your schedule and adjust automatically, saving 10–23% on your annual cooling bill.
Change Your Air Filter Every 30–60 Days
This is the single easiest thing you can do for your AC. A clogged filter forces your system to work harder, drives up your energy bill, and can lead to costly repairs over time. In Phoenix, where dust and allergens are high year-round, filters get dirty fast, so check yours every month during peak cooling season.
Keep Your Outdoor Unit Clear
Your AC’s condenser sits outside in direct Arizona sun, and it needs airflow to do its job. Make sure there’s at least two feet of clearance around all sides. Trim back any shrubs, rinse the unit down with a garden hose a few times a season (with the unit turned off), and keep it shaded if possible. Shade can improve efficiency by up to 10%.
Seal Your Home Against the Heat
Even a great AC system struggles in a leaky home. Check for gaps around doors and windows, and make sure your attic insulation is up to par. Blackout curtains or solar shades on west-facing windows can reduce your cooling load by up to 25%. The afternoon Arizona sun is brutal.
Run the AC Smarter, Not Harder
- Avoid heat-generating appliances like ovens and dryers during peak heat hours (2–8 PM). Use your microwave, air fryer, or grill outside instead.
- Use ceiling fans to circulate cool air. They let you feel comfortable at a higher thermostat setting. Just remember fans cool people, not rooms, so turn them off when you leave.
- Close interior doors to rooms you’re not using. Less square footage means your system cools efficiently.
Get an AC Tune-Up Before Summer Peaks
A professional AC tune-up in the spring catches small problems before they become expensive emergencies, and a well-maintained system runs more efficiently all season. Our technicians check refrigerant levels, clean the coils, inspect electrical connections, and make sure your system is ready to handle the Phoenix heat.
Cold Pros Air serves the entire Phoenix and Scottsdale metro area. Give us a call before the heat hits and we’ll make sure your system is running at peak efficiency, so your energy bills don’t have to climb any higher than the temperature outside.