How to Prepare Your HVAC System for a Heatwave in Los Angeles & Orange County

With summer heatwaves on the rise in LA & OC, here’s how to get your HVAC system ready—before it’s too late.

Summers in Southern California can be brutally hot, and when a heatwave rolls in, your HVAC system becomes your first line of defense. If your system isn’t ready, you're not just risking discomfort—you’re risking higher bills, potential breakdowns, and costly emergency repairs.

At Smartchoice Service, we help homeowners across Los Angeles and Orange County prepare their ACs, furnaces, and heat pumps before the extreme heat hits. Here’s what you can do right now to make sure your system won’t let you down when temperatures soar.

Schedule a Pre-Heatwave Maintenance Check

Preventive maintenance is your best friend when it comes to heatwaves. A technician will inspect components, clean coils, check refrigerant levels, test safety controls, and ensure everything’s running at peak efficiency.

Discover why HVAC maintenance is so important »

Replace Your Air Filter

Clogged or dirty air filters restrict airflow and force your system to work harder. This not only lowers efficiency but also increases the risk of overheating and breakdowns during intense usage.

Check the Thermostat in Advance

Don’t wait for the heat to test your system. Set your thermostat to cooling mode, monitor how quickly the system responds, and consider upgrading to a smart thermostat for better temperature control during peak hours.

Inspect Vents and Outdoor Units

Clear dust, furniture, and curtains away from indoor vents. Outside, remove leaves, weeds, and debris from around the condenser. Proper airflow is crucial during a heatwave.

Be Aware of Strange Noises or Smells

If your system is buzzing, rattling, or producing musty or burnt odors—don’t ignore it. These are early warning signs that your unit could fail when you need it most.

Check out our guide: Top 10 Signs Your HVAC System Needs Repair »

Consider Upgrading an Old Unit

If your AC or heat pump is over 10–15 years old, it may not handle extreme temperatures well. Investing in a new, energy-efficient system could save you from expensive emergency calls—and keep your home reliably cool.

Need help choosing a system? See our complete guide »

Have an Emergency Plan

Keep our number saved for fast service. We offer emergency HVAC repair in Los Angeles and Orange County, so if something goes wrong, we’ve got you covered—day or night.

Stay Cool and Stress-Free with Smartchoice Service

The best time to prepare your HVAC system for a heatwave is before it starts. Whether you need a tune-up, a new installation, or fast AC repair, our experienced techs are ready to help.

📞 Call Smartchoice Service at (800) 801-0798 or schedule your maintenance online today—and stay cool no matter what the weather does.