How to Clean AC Coils

Your air conditioner can’t perform its best when its coils are covered in dust and grime. Dirty AC coils make it harder for your system to cool your home, which leads to higher energy bills and unnecessary wear on your equipment. Over time, neglected coils can reduce airflow, cause poor cooling, or even contribute to a system breakdown. 

Luckily, cleaning your coils is a simple task that can make a big difference. With just a little time and the right tools, you can help your AC run more efficiently and keep your home more comfortable. In this blog, we’ll walk you through what your coils do, how to clean them, and when it’s time to call in the pros at SoGood Plumbing, Heating & Air.

Why Clean AC Coils Matter

Your AC system relies on two types of coils to keep your home comfortable: evaporator coils (located inside) and condenser coils (located in the outdoor unit). The evaporator coil absorbs heat from inside your home, while the condenser coil releases that heat outdoors. Together, they play a critical role in cooling your air and keeping your system running efficiently.

When these coils get dirty—from dust, pet hair, grass clippings, or general outdoor debris—they can’t transfer heat as effectively. This forces your air conditioner to work harder, increasing energy usage and wearing down key components faster. You might notice longer cooling cycles, uneven temperatures, or a system that seems to run non-stop.

If left unchecked, dirty coils can lead to serious problems like overheating, ice buildup, or even system failure. That’s why routine cleaning is essential—not only for performance but also for the long-term health of your AC system.

Signs Your AC Coils Need Cleaning

Your air conditioner might not be able to tell you what’s wrong—but it does show signs when something isn’t right. If you notice any of the following issues, dirty coils could be the culprit.

Warm Air Instead of Cool Air

When coils are coated in grime, they can’t absorb or release heat effectively. That means your AC might run, but it won’t cool the air properly.

Increased Energy Bills

If your energy bills are creeping up without a change in usage, your system could be working overtime due to restricted coil performance.

AC Runs Constantly

A system with dirty coils has to work harder and longer to maintain your set temperature. You may notice it’s running non-stop without effectively cooling your home.

Visible Dirt or Debris on Outdoor Unit

Check the condenser coils on your outside unit. If you see leaves, grass, or dirt clinging to the sides, your system likely needs a good cleaning.

Frozen Coils or Ice Buildup

If your evaporator coil freezes up, it may be caused by restricted airflow due to dirt. Ice is a major red flag and should be addressed right away.

How to Clean AC Coils

Cleaning your AC coils might sound intimidating, but with the right tools and a little patience, it’s a task many homeowners can handle safely. Here’s what you’ll need and how to do it.

Step-by-Step Cleaning Process

1. Turn off the power to your AC unit at the thermostat and the breaker. Safety first.
   
2. Access the coils by removing the panels on the indoor evaporator unit and/or the outdoor condenser unit.
   
3. Gently brush away loose debris from the coil surfaces using a soft brush or cloth.
   
4. Spray coil cleaner evenly across the surface. Let it sit for the recommended time—usually 5 to 10 minutes—to break down buildup.
   
5. For outdoor coils, rinse with a garden hose, being careful not to use high pressure, which could bend the fins.
   
6. Allow everything to dry, then reassemble panels and restore power.
   

Proper coil cleaning helps restore efficiency, improves airflow, and ensures your system delivers reliable cooling when you need it most.

When to Call a Professional

While many homeowners can handle basic AC coil cleaning, there are times when it’s best to leave it to a trained technician. If your coils are difficult to access, especially inside the evaporator unit, attempting to clean them without the right tools or experience could lead to accidental damage.

You should also call a professional if you notice ice on the coils, water leaks, or visible corrosion—these are signs of bigger issues that cleaning alone won’t fix. If your system hasn’t been serviced in over a year or you’re seeing no improvement in cooling performance after cleaning, it’s time to bring in an expert.

A licensed HVAC technician from SoGood Plumbing, Heating & Air can not only clean your coils thoroughly but also check refrigerant levels, inspect for damage, and make sure your entire system is running safely and efficiently.

Tips to Prevent Dirty Coils

Keeping your AC coils clean doesn’t have to be complicated. With a few regular habits, you can avoid buildup and keep your system running smoothly.

Change Your Air Filters Regularly

A clean filter keeps dust and debris out of your system. Check filters monthly and replace them every 1–3 months during heavy use.

Keep the Outdoor Unit Clear

Trim back grass, bushes, and other debris at least 2–3 feet around your condenser unit to maintain proper airflow and reduce dirt buildup.

Schedule Seasonal Maintenance

A professional tune-up before summer ensures your coils and other components are clean, checked, and ready for the season.

Don’t Block Vents or Returns

Keep furniture, rugs, or curtains from blocking airflow throughout your home. Good airflow reduces strain on your coils.

Clean Coils Annually

Even with good habits, dirt will build up over time. Plan to clean your coils at least once a year—more often if you have pets or live in a dusty environment.

Protect Your Comfort with Regular Coil Cleaning

Your AC system works hard to keep your home comfortable—but it can’t do that efficiently with dirty coils. Regular cleaning helps your system cool more effectively, lowers your energy bills, and prevents unnecessary wear on important components. It’s a simple task that goes a long way toward keeping your comfort on track.

Whether you clean your coils yourself or prefer to have a professional handle it, the key is consistency. Don’t wait until there’s a problem to take action.

Contact SoGood Plumbing, Heating & Air today to schedule your AC coil cleaning or seasonal maintenance. We’ll make sure your system runs SoGood it barely breaks a sweat.