Technician using tool for AC refrigerant leak detection

Jul 01 2025 - FERSA HVAC Heating & Air - HVAC & AC

AC Refrigerant Leak Detection and How to Catch Problems Early

In this Article: hide

1 Signs You May Have a Refrigerant Leak

2 Common Causes of AC Leaks

3 How HVAC Technicians Detect Refrigerant Leaks

4 Why Timely Leak Repair Matters

5 FAQs – AC Refrigerant Leak Detection

6 Call FERSA HVAC for Reliable AC Leak Detection in Texas

When your air conditioner starts blowing warm air or can’t keep up with the heat, one of the most common culprits is a refrigerant leak. Knowing how AC refrigerant leak detection works—and what signs to watch for—can help you avoid costly damage and get your system back on track quickly.

At FERSA HVAC Heating & Air, we help homeowners throughout Mesquite, Dallas, and the surrounding cities identify leaks, fix the issue, and restore proper cooling fast. So, how do you detect a refrigerant leak? What causes it? And when should you call for emergency AC repair?

Here’s what every homeowner should know.

Signs You May Have a Refrigerant Leak

Refrigerant is the chemical that absorbs heat from inside your home and releases it outside. When there’s a leak, your system loses its ability to cool properly, often without any warning.

Watch for these signs in places like Rowlett, Garland, or Plano:

AC is running, but the air feels warm
Energy bills suddenly spike
Hissing or bubbling sounds near the unit
Ice forming on the refrigerant lines or evaporator coil
The system runs longer than usual to cool the space

These symptoms often appear gradually. If you’re unsure whether the problem is refrigerant-related, read our guide on why your AC might not be cooling for additional clues.

Common Causes of AC Leaks

Refrigerant leaks don’t happen by accident—they typically result from wear, damage, or improper installation. In areas like Farmers Branch and Carrollton, where systems work hard during long summers, small issues can escalate quickly.

The most common causes of AC refrigerant leaks include:

Corroded coils: Over time, exposure to moisture and chemicals can eat away at the metal.
Damaged connections or joints: Loose fittings often lead to slow leaks.
Poor factory welding or installation errors: These flaws show up more in older or poorly installed systems.
Physical damage: Lawn tools or pets can accidentally strike the outdoor lines.

If you suspect a leak, prompt AC emergency repair in Mesquite can prevent further damage and restore comfort fast.

How HVAC Technicians Detect Refrigerant Leaks

While the signs above can help you suspect a leak, accurate diagnosis requires professional tools. Our FERSA HVAC technicians use several methods, including:

Electronic leak detectors: These devices sense even tiny refrigerant levels in the air.
UV dye testing: A special dye is injected into the system to pinpoint the leak location.
Soap bubble test: For visible line areas, bubbles reveal escaping gas.

These tests are precise and safe for systems used across Allen, Princeton, and McKinney. Once the leak is found, we repair the line and recharge the system with the correct refrigerant level.

Why Timely Leak Repair Matters

A small leak might seem harmless at first, but it quickly leads to major system strain. Running your AC with low refrigerant not only reduces cooling, but it can burn out the compressor and cause full system failure.

Homeowners in Seagoville, Lucas, and Forney rely on regular HVAC checks to avoid this kind of damage. If you’ve had frequent top-offs or repeated cooling issues, a proper inspection is the smart move.

At FERSA HVAC, we don’t just refill—we find the root problem and fix it right the first time.

FAQs – AC Refrigerant Leak Detection

Is it safe to keep running my AC with a leak?

No. Operating your system with low refrigerant can overwork the compressor and cause costly damage.

Can I detect a refrigerant leak myself?

You may notice signs like warm air or ice, but detecting the actual leak requires specialized tools and training.

How much does leak repair usually cost?

It varies based on location and severity. Our team provides upfront pricing and fast service across Mesquite and the surrounding cities.

Call FERSA HVAC for Reliable AC Leak Detection in Texas

If your AC isn’t keeping up or you’ve noticed signs of a leak, don’t wait for the system to fail. FERSA HVAC Heating & Air provides expert leak detection and emergency repairs throughout Mesquite, Richardson, Plano, and more.