Why Does Your AC Keep Leaking Gas? (And How to Fix It Permanently
Posted on : 28-Apr-2026
You might get the gas refilled, but a few months later, the exact same problem returns. So, why does AC gas leak repeatedly? And more importantly, how can you fix this issue permanently? Let’s dive into the details.
4 Main Reasons for AC Gas Leakage
An air conditioner operates on a closed-loop system. Under ideal conditions, the refrigerant (gas) inside your AC never simply "runs out." If the gas level is low, it means there is a leak. Here are the primary culprits:
1. Corrosion on Copper Pipes (The Drain Effect)
In the Delhi NCR region, heavy pollution and gases emitted from open drains (like hydrogen sulfide) heavily impact AC copper pipes. This chemical reaction causes severe corrosion, creating tiny pinholes in the metal where the refrigerant slowly escapes over time.
2. Improper Installation or Loose Joints
When an AC is installed, the indoor and outdoor units are connected using copper pipes that are flared and secured with nuts. If these joints are not tightened perfectly during installation, or if the flaring is slightly off, the high-pressure gas will eventually leak from these weak points.
3. Vibration and Constant Friction
The outdoor unit of your AC vibrates while the compressor is running. If the copper pipes are touching each other or resting against the metal body of the AC unit, this constant vibration causes friction. Over time, the pipes wear down, creating a hole.
4. Damaged Evaporator or Condenser Coils
A lack of regular AC servicing leads to a massive buildup of dust and dirt on your coils. Over time, this debris traps moisture and causes the coils to rust and degrade. Finding a leak in an old, heavily rusted coil is extremely difficult and often leads to recurring gas loss.
Why "Just Refilling" the Gas is a Bad Idea
Many people try to save money by simply opting for an AC gas top-up without actually fixing the leak. This is a temporary and wasteful solution. If the hole is still there, the expensive new refrigerant will simply leak out again in a few weeks or months.
The Right Way to Fix an AC Gas Leak: A professional technician will never refill an AC without testing for leaks first. The standard procedure includes:
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Pumping Nitrogen pressure into the system to locate the exact source of the leak.
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Permanently sealing the hole using professional welding (brazing).
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Using a Vacuum Pump to remove all air and moisture from the lines.
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Finally, refilling the fresh AC refrigerant by exact weight for perfect cooling efficiency.
How to Prevent Frequent Gas Leaks
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Regular Maintenance: Always book a deep clean and routine servicing before the peak summer season begins.
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Anti-Rust Coating: If you live near an open drain, ask your technician to apply a special anti-rust chemical coating (U-bend coating) to your cooling coils.
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Hire Expert Technicians: Always rely on experienced, professional HVAC technicians for installations and repairs.
Looking for the Best AC Repair Service in Delhi?
If your AC is struggling to cool your room, or if you are tired of dealing with recurring gas leaks, reach out to the expert team at Delhi Daily Service.
Our professional technicians use advanced tools and strict nitrogen testing protocols to find and permanently fix leaks, ensuring you get the best cooling performance without any future hassle!
📞 Book Your AC Repair Service Today! [I9821221877]