When temperatures soar, your air conditioner works harder than ever to keep your home comfortable. If it’s not running efficiently, you could face higher energy bills, poor cooling performance, and even unexpected breakdowns. Here’s how to ensure your AC stays in peak condition during extreme heat.
1. Set Your Thermostat Wisely
Raising the thermostat a few degrees when it’s extremely hot can prevent your AC from overworking. The U.S. Department of Energy recommends setting your thermostat to 78°F (26°C) when you’re home and increasing it slightly when you’re away. Using a programmable thermostat helps maintain a consistent temperature without wasting energy.
Additional Tips:
- Avoid setting the temperature too low. Your AC won’t cool the room faster but will consume more energy.
- Use ceiling fans to help distribute cool air, allowing you to set the thermostat a bit higher.
2. Change or Clean the Air Filter Regularly
A clogged air filter restricts airflow, forcing your AC to work harder. The Department of Energy states that replacing a dirty filter can lower an AC’s energy consumption by up to 15%.
How Often Should You Change It?
- Every 1-2 months during peak usage periods.
- More frequently if you have pets or allergies.
- If using a reusable filter, clean it according to the manufacturer’s instructions.
3. Keep Vents and Registers Clear
Blocked or closed vents force your system to work harder, reducing efficiency. Walk through your home and:
- Ensure all supply and return vents are open and unobstructed by furniture, curtains, or rugs.
- Dust and vacuum around vents regularly to prevent buildup.
4. Seal Leaks and Insulate Your Home
Poor insulation and air leaks cause cool air to escape, making your AC work overtime. The EPA estimates that sealing leaks and adding insulation can reduce energy costs by up to 20%.
Ways to Improve Insulation:
- Seal gaps around doors and windows with weatherstripping.
- Use blackout curtains or thermal shades to block heat from the sun.
- Add attic insulation to prevent heat from seeping in.
5. Avoid Heat Buildup Indoors
Reducing indoor heat sources helps your AC maintain a comfortable temperature more efficiently.
Easy Ways to Minimize Heat Gain:
- Cook outside or use a microwave instead of the oven.
- Run appliances at night (dishwasher, dryer) to avoid adding heat during peak hours.
- Use LED bulbs, which generate less heat than incandescent lights.
- Close blinds or shades during the hottest part of the day.
6. Maintain Your Outdoor Unit
Your AC’s outdoor condenser unit needs proper airflow to function efficiently. Here’s how to keep it in top shape:
- Clear away debris like leaves, dirt, and grass clippings.
- Trim vegetation at least two feet around the unit.
- Hose down the coils gently to remove dirt buildup.
7. Schedule Professional AC Maintenance
Routine maintenance by an HVAC professional can increase efficiency by up to 30% and extend the life of your system. A tune-up typically includes:
- Checking refrigerant levels.
- Cleaning coils and components.
- Inspecting electrical connections.
- Testing overall system performance.
It’s best to schedule maintenance before the peak cooling season to ensure your AC is ready for extreme heat.
8. Upgrade to an Energy-Efficient System If Needed
If your AC is over 10-15 years old, it may struggle to keep up with high temperatures. Newer models with a high SEER (Seasonal Energy Efficiency Ratio) rating use less energy while providing better cooling. Look for units with an ENERGY STAR® certification, which can save up to 20% on cooling costs compared to older models.
9. Reduce Humidity Levels
High humidity makes your home feel warmer and forces your AC to work harder. A dehumidifier can help remove excess moisture, making indoor air more comfortable. Running exhaust fans in the kitchen and bathroom also help lower humidity levels.
10. Be Mindful of Peak Electricity Demand
During extreme heat, power grids experience higher demand, which can strain your AC. To ease the load:
- Use major appliances in the early morning or late evening.
- Close doors to unused rooms to cool only necessary spaces.
- Consider pre-cooling your home before temperatures peak.
Keeping your AC running efficiently during extreme heat is all about smart usage, regular maintenance, and proper home insulation. With these strategies, you can stay comfortable while avoiding high energy bills and unexpected breakdowns. If you notice your system struggling despite these tips, it may be time for a professional inspection to ensure everything is working as it should.