How To Fix a Refrigerant Leak in Your AC: Expert Steps
Warm air from the vents, a faint hissing noise, and energy bills that keep climbing. An AC refrigerant leak rarely announces itself, but it quietly drains your system's cooling power and your wallet. Knowing what to do in the first hour can save you from a far bigger repair.
The short answer: turn the system off, avoid touching the refrigerant, and call a professional. Refrigerant must be handled by certified technicians, and DIY patches are only a temporary measure.
Watson Heating & Air has repaired refrigerant leaks across Lexington and Central Kentucky since 2011. Our licensed, insured technicians give you upfront pricing before any work begins, with 24/7 emergency availability when the leak can't wait.
Key Points
- Shut off your air conditioner as soon as you suspect an AC refrigerant leak to prevent compressor damage.
- Tape or sealant can slow a minor leak, but only professional repair fixes the problem for good.
- Hissing sounds, warm air, high energy bills, and extra indoor humidity are the most common warning signs.
- Refrigerant exposure is a health hazard, so leave the handling to certified technicians.
First Steps When Your AC Is Leaking Refrigerant
Before calling a professional HVAC technician for assistance, you can take several actions to ensure the leak in your air conditioning refrigerant doesn't get worse. Stopping a leak before it worsens will help you avoid more extensive repair or replacement costs for your air conditioning unit.
- Shut Off Your Air Conditioner - If you notice an air conditioner refrigerant leak, shutting off power to the unit remains essential in preserving it. Shutting off the power to your AC can prevent a further loss of air conditioner refrigerant and more damage. At the start of the warmer months, check your AC unit for any signs of leaks, so you don't have to go without air conditioning in the heat.
- Seal the Leak - If the leak appears minor, you can patch the tear with tape or sealant to stop the leak. Some leaks, such as those originating in the evaporator coils, can be tough to detect. Calling the experts in AC repair in Lexington can help locate and seal the leak before it causes further damage to your unit.
- Seek Professional Air Conditioner Service - Even if you successfully patch the leak yourself, it remains essential to receive professional refrigerant leak repair to ensure your unit doesn't continue to leak. Given the nature of refrigerant, handling it with care remains crucial for your and your home's health. Additionally, regular maintenance can prevent an AC refrigerant leak from occurring in the first place. A professional HVAC technician can check your refrigerant levels, find and repair leaks, and offer suggestions for replacement should your unit need it.
Common Causes and Signs of AC Refrigerant Leaks
Understanding the common causes of AC refrigerant leaks can help you identify the source of the problem and find the best solution. Most leaks start in the refrigerant lines, the evaporator coil, or the valve connections.
Installation Issues
Incorrect or haphazard AC unit installation can leave you with an AC refrigerant leak. The most common installation issue involves an over tightening of the flare connections.
Erosion of Metal Components
With so many AC units being outside, weather erosion is a common reason for AC refrigerant leaks. Metal erosion can create microscopic holes that allow the refrigerant to leak out.
High Energy Bills
A leak in your AC refrigerant prevents your unit from functioning optimally. A leak means your AC unit must work harder to keep your home cool, and you will see that extra effort on your electric bill.
Inadequate Cooling
If you constantly have to turn your AC up, yet your home still feels unbearably hot, your AC unit might have a leak.
Added Humidity in Your Home
A lack of refrigerant in your AC can lead to excessive moisture buildup in your home. Extra moisture can be uncomfortable and lead to other issues, such as mold formation.
Hissing Sounds
A hissing or whizzing sound occurs when the refrigerant escapes from the coils. A hissing sound could also indicate a more severe problem of pressure building in the AC's compressor. Contact a professional HVAC technician immediately if you hear a hissing sound from your AC unit.
Why Refrigerant Leaks Are Dangerous
An air conditioner refrigerant leak not only leaves you with an inefficient AC unit, but it can also cause harm to your health. AC refrigerant, a.k.a. Freon, has no smell or taste, making it difficult to detect in your environment. If you or a family member happen to ingest freon, it could lead to nausea, vomiting, headaches, trouble breathing, and more dangerous complications. The U.S. Environmental Protection Agency requires refrigerant to be handled by certified technicians for exactly this reason.
AC Refrigerant Leak FAQs
Can I fix a refrigerant leak myself?
You can slow a minor leak with tape or sealant, but a permanent fix requires professional repair. Refrigerant handling requires certification, and recharging a system without sealing the leak only delays the same problem.
What does a refrigerant leak sound like?
A hissing or whizzing sound near the coils is the most common sign of escaping refrigerant. A constant hiss can also signal pressure building in the compressor, which needs immediate professional attention.
Will my AC still run with a refrigerant leak?
It will run, but it will struggle. Expect warm air, longer cycles, higher energy bills, and added indoor humidity until the leak is repaired.
Suspect an AC Refrigerant Leak? Call Watson
Several common air conditioning problems can lead to issues requiring professional repair or replacement. While you can take several steps to stop the initial leak, you should call a professional AC repair team to inspect the leak's cause further. If the leak strikes after hours, our emergency HVAC repair team answers 24/7, including weekends and holidays.
Routine care matters too. The U.S. Department of Energy lists coil and refrigerant checks among the most important air conditioner maintenance tasks, and our professional AC maintenance visits cover both.
If you search "how to fix a refrigerant leak in AC" but still find yourself without a solution, schedule your appointment today or call Watson Heating & Air at (859) 695-3950. We'll help you fix the issue and prevent it from coming back.
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