9 Common Air Conditioner Myths Des Moines
Homeowners Need to Stop Believing

When summer temperatures soar in Des Moines, your air conditioner becomes one of the most important appliances in your home. But with so much misinformation out there, it’s easy to fall for common myths that could end up costing you more money—or even shortening your AC’s lifespan.

At Golden Rule Plumbing, Heating, Cooling & Electrical, we’re here to clear up these myths so you can keep your home comfortable without wasting energy or damaging your system.

Myth #1: Lowering the Thermostat Cools Your Home Faster

Many homeowners think cranking the thermostat way down will cool the home more quickly. Unfortunately, it doesn’t work that way.

Your air conditioner runs at the same speed no matter the temperature setting—it simply keeps running until it hits the target temperature. Setting your thermostat lower than necessary just makes your system run longer, driving up your energy bill.

Better strategy: Set a reasonable temperature (around 75–78°F when you’re home) and give your AC time to work efficiently.

Myth #2: Ceiling Fans Help Cool the Entire Room

Ceiling fans don’t actually cool the air; they create a wind-chill effect that makes you feel cooler. In an empty room, fans just waste electricity.

Pro tip: Use ceiling fans in occupied rooms to help you feel cooler, but always turn them off when you leave.

Myth #3: Closing Vents in Unused Rooms Saves Energy

It seems logical—close the vents in unused rooms and force more cool air into the spaces you use, right? In reality, this can put extra strain on your system.

Closing vents disrupts airflow, increases pressure in your ducts, and can lead to air leaks or even system damage.

Myth #4: Routine AC Maintenance Isn’t Necessary

Some people think their AC will run just fine without annual maintenance—but skipping service can lead to costly repairs down the line.

Seasonal tune-ups help catch small issues before they become major problems and keep your system running efficiently.

Bonus: Golden Rule offers AC maintenance services in Des Moines to keep your system in peak condition.

Myth #5: Bigger AC Units Provide Better Cooling

It’s a common misconception that bigger is better. In fact, an oversized air conditioner can lead to uneven cooling, frequent cycling, and high humidity.

Your AC should be properly sized for your home’s square footage, insulation, and other factors. Our team can help you choose the right system for your needs.

Myth #6: AC Units Only Need Refrigerant When They’re Low

Refrigerant isn’t like gas in your car—it doesn’t get “used up.” If your system is low on refrigerant, it’s likely due to a leak that needs professional attention.

Topping off refrigerant without fixing the leak is just a temporary (and costly) band-aid.

Myth #7: Thermostat Placement Doesn’t Matter

Where your thermostat is located has a huge impact on your AC’s performance. If it’s placed near windows, vents, or appliances, it can register inaccurate temperatures.

This can lead to your system running too often—or not enough. Our pros can help ensure your thermostat is in the best location for optimal comfort.

Myth #8: It’s Normal for AC Units to Make Noise

While some sound is expected during operation, loud or unusual noises like banging, screeching, or rattling are not normal. These sounds can signal loose parts, motor issues, or more serious problems.

If your AC is making strange noises, it’s time to call a professional.

Myth #9: DIY Repairs Are Just as Good as Hiring a Pro

In the age of YouTube tutorials, it’s tempting to tackle AC repairs yourself. However, without the right training and tools, DIY fixes often make the problem worse—and can void your warranty.

Our certified HVAC technicians at Golden Rule are here to safely and efficiently handle any AC issues you may face.

Trust Des Moines’ HVAC Experts: Golden Rule

Don’t let these air conditioner myths leave you uncomfortable this summer. Whether you need AC repair, maintenance, or a brand-new system, you can count on Golden Rule Plumbing, Heating, Cooling & Electrical to provide top-quality service across the Des Moines metro.

Need expert AC help? Call Golden Rule today or book your service online!

Contact Golden Rule