How to Detect AC Leaks Before They Cause Major Issues

Amanda Brown • August 20, 2025

When you let a refrigerant leak persist for an extended period of time, the low coolant level can damage the condenser coils and many other components. Unfortunately, it’s easy to miss the early warning signs of a leak. You’ll know to schedule professional AC refrigerant leak detection in Tennessee if you notice these early symptoms.


Keep an Eye Out for Oily Residue

Even with an annual tune-up, a refrigerant leak can develop gradually. Watch for oily residue near the refrigerant lines, connecting parts, and other nearby components. Another visual cue is that the condenser or evaporator coils frequently freeze over. Icy coils indicate several cooling malfunctions, but low refrigerant is a common cause.


Listen for Unusual AC Sounds

Schedule professional AC refrigerant leak detection in Tennessee if the unit starts making unusual sounds. In particular, a hissing or bubbling sound results from a refrigerant leak. As the leak worsens, that hissing sound will change to a loud, gurgling noise. 


Pay Attention to Indoor Comfort

Even before the system suffers serious damage, the low refrigerant level will interrupt the cooling process. You might notice that your home feels warmer than usual. Alternatively, it's not uncommon to find hot spots or warm rooms. Reach out to your HVAC company if you notice any cooling changes. 


Watch for Longer Cooling Cycles

Have you noticed extended cooling cycles? If so, your AC might have low refrigerant. As the refrigerant level drops, the system will work harder to keep up with your cooling needs. The longer cycles are an effort by the air conditioner to maintain a more consistent indoor temperature. 


This process will continue without having any positive effect on your indoor temperature. Running a system in this condition only leads to excessive energy waste and AC damage.


Need AC Refrigerant Leak Detection in Tennessee? Talk to the Pros

When you work with David Brown Heating & Cooling, LLC, you’ll have access to the leading HVAC service provider in your community. We can diagnose any cooling problem, including refrigerant leaks, and offer reliable repairs to restore the efficient performance of your AC. Contact us to schedule service today!

David Brown technician performing AC maintenance during a hot Tennessee summer day to prevent emerge
By Amanda Brown August 1, 2025
Avoid emergency AC repairs during a Tennessee heatwave with regular tune-ups, filter changes, and duct cleaning. Learn key tips to keep your system running strong.
Woman Cleaning Air Conditioning System.
By Amanda Brown June 23, 2025
Stay cool all summer in Tennessee with expert AC maintenance tips. From filter changes to duct cleaning, David Brown HVAC has you covered—schedule service today!
David Brown technician inspecting outdoor AC unit for repairs in Tennessee home before summer.
By Amanda Brown May 27, 2025
Notice rising energy bills or warm air from vents? Learn the top signs your AC needs repair before summer in Tennessee. Get fast help from trusted local experts.
An outdoor AC unit An outdoor AC unit on on fire representing a need for replacement in Dickson, TN.
By Amanda Brown April 30, 2025
Is your system ready for summer? Contact David Brown Heating & Cooling for spring air conditioning replacement in Dickson, TN, for reliable cooling and energy savings.
Women enjoying air conditioning in front of a ductless ac unit in springtime in Dickson, TN.
By Amanda Brown March 31, 2025
Is your AC over 15 years old or in constant need of repairs? Spring is the best time to schedule AC replacement in Dickson, TN. Beat the summer rush today!
Heating & Cooling vent & heat pump system in a Dickson, TN, home.
By Amanda Brown February 28, 2025
Upgrade your home with an energy-efficient heat pump change-out in Dickson, TN. Enjoy year-round comfort with reliable heating and cooling service calls.
A technician installing a modern heating system in a Tennessee home.
By Amanda Brown January 31, 2025
Explore the best heating system options for change-outs in Dickson, TN. Learn about furnaces, boilers, heat pumps, and ductless mini splits to find the right fit for your home.
A frustrated home owner needs a heater to be replaced in a home in Dickson, TN.
By Amanda Brown December 23, 2024
Learn the signs it’s time for a heating change-out in Dickson, TN, from David Brown Heating & Cooling, LLC. Contact us for professional replacement services.
A residential furnace in winter, representing signs heating repair is needed in Tennessee.
By Amanda Brown November 25, 2024
Learn the top signs your heating system needs repair in Tennessee, from uneven airflow to rising utility bills. Contact David Brown Heating & Cooling for expert service.
A residential furnace in winter, representing signs heating repair is needed in Tennessee.
By Amanda Brown October 30, 2024
Learn the top signs your heating system needs repair in Tennessee, from uneven airflow to rising utility bills. Contact David Brown Heating & Cooling for expert service.