9 Air Conditioner Myths Johnston Homeowners Need to Stop Believing

At Golden Rule Plumbing, Heating, Cooling & Electrical, we’ve seen just about every AC myth under the sun—and many of them are costing Johnston homeowners comfort and money! Let’s set the record straight by busting these common myths that could be hurting your air conditioner and your wallet.

1. Bigger Is Always Better for AC Units

It’s tempting to think that a larger air conditioner will cool your home faster and better, but that’s simply not true. An oversized AC short-cycles—turning on and off too frequently—which leads to:

  • Uneven cooling
  • Higher energy bills
  • Excessive wear and tear

At Golden Rule, we properly size AC units based on your home’s square footage, insulation, window placement, and more. Bigger isn’t better—right-sized is best.

2. You Only Need to Replace the AC When It Stops Working

If you’re waiting for a total breakdown before replacing your AC, you could be setting yourself up for a pricey emergency. Many Johnston homeowners don’t realize that older systems (10+ years) often:

  • Run less efficiently
  • Cost more to repair
  • Drive up energy bills

Upgrading to a newer, high-efficiency system can save you money in the long run—even before your old unit fully fails.

3. Cranking the Thermostat Cools Your Home Faster

Nope—your AC works at one speed, regardless of the thermostat setting. Setting it lower than your desired temperature won’t cool your home faster; it’ll just run longer, wasting energy.

Pro Tip: Set your thermostat to your target temperature and let it work steadily for best results.

4. Closing Vents in Unused Rooms Saves Money

While this may seem like a logical way to cut costs, closing vents actually throws off your AC’s airflow. It increases pressure inside the system, making it work harder and possibly causing damage.

For optimal efficiency, keep all vents open and ensure good airflow throughout your Johnston home.

5. Maintenance Isn’t Necessary Unless There’s a Problem

This myth is a big one! Routine AC maintenance:

  • Keeps your system running efficiently
  • Prevents costly breakdowns
  • Extends the life of your unit

We recommend scheduling annual AC tune-ups in Johnston before summer hits. Preventative care saves you money and stress.

6. Ceiling Fans Can Replace Air Conditioning

Fans can help you feel cooler by circulating air, but they don’t actually lower the temperature. They work best when paired with your AC, allowing you to raise the thermostat a few degrees without sacrificing comfort.

Pro Tip: Turn off fans when leaving a room—they only cool people, not spaces.

7. The Outdoor Unit Doesn’t Need Cleaning

Dirt, leaves, and debris can block airflow in your outdoor condenser, causing your AC to work overtime. Regularly cleaning around your outdoor unit and scheduling professional service keeps it operating efficiently.

Johnston homeowners should clear at least 2 feet of space around the unit for proper airflow.

8. All Air Filters Are the Same

Using the wrong air filter can reduce airflow and strain your system. While high-rated filters capture more particles, they may also restrict airflow if not compatible with your system.

Not sure which filter is right for your Johnston home? Ask the pros at Golden Rule!

9. Energy Efficiency Only Comes from New Equipment

New AC units are definitely more efficient, but you can boost efficiency with your current system, too. Actions like:

  • Sealing ductwork
  • Adding insulation
  • Installing a programmable thermostat

…can significantly improve comfort and reduce costs.

Don’t Fall for AC Myths—Trust Johnston’s Cooling Experts

At Golden Rule, we’ve proudly served Johnston, Iowa, with honest, expert HVAC care. Whether you need AC repair, maintenance, or a new system, we’ll help you stay cool without falling for these common myths.

Ready for expert AC help?

Contact Golden Rule