Extreme Heat: How to Protect Your HVAC System and Keep Your Home Comfortable

When temperatures soar, your air conditioner has to work much harder to keep your home cool. During periods of extreme heat, it’s common for HVAC systems to run longer than usual, which can increase energy bills and put extra strain on your equipment.

The good news? A few simple steps can help your system perform more efficiently while keeping your family comfortable.

1. Don’t Set Your Thermostat Too Low

It may seem like lowering the thermostat to 65°F will cool your home faster, but it won’t. Your HVAC system cools at a steady rate regardless of the temperature setting.

Recommended setting: 76–78°F when you’re home.

2. Change Your Air Filter During Extreme Heat

A dirty air filter restricts airflow, forcing your AC to work harder during the hottest days of the year.

Replace your filter every 1–3 months, depending on usage and indoor air quality.

3. Keep Vents Open and Unblocked

Furniture, curtains, or rugs can block airflow and make your system less efficient.

Walk through your home and make sure all supply and return vents are clear.

4. Avoid Extra Heat Indoors

• Reduce indoor heat by:
• Using ceiling fans.
• Closing blinds during the hottest part of the day.
• Limiting oven use during the afternoon.
• Turning off lights and electronics when not in use.

These small changes help your AC work less.

5. Schedule Preventive Maintenance During Extreme Heat

Extreme heat puts extra stress on every component of your HVAC system.

A professional inspection can identify worn parts, refrigerant issues, dirty coils, or airflow problems before they turn into expensive repairs.

Signs Your AC Is Struggling

If you notice any of these warning signs, it’s time to call a professional:

• Warm air coming from the vents
• Weak airflow
• Strange noises
• Ice on the outdoor unit
• High humidity indoors
• Rising energy bills

Your AC runs constantly but never reaches the desired temperature

Don’t Wait Until Your AC Breaks Down

The hottest days of summer are also the busiest time for HVAC repairs. Scheduling maintenance before your system fails can help you avoid unexpected breakdowns and costly emergency service.

Stay Cool with Fernandez HVAC

Whether you need routine maintenance, fast repairs, or a complete AC replacement, the experienced team at Fernandez HVAC is here to help homeowners throughout Virginia, Maryland, and Washington, D.C.

Contact us today to schedule your HVAC inspection and stay comfortable—even during extreme heat.