AC Running But Not Cooling? Why AC Gas Leaks & The Permanent Solution by Delhi Daily Service
Posted on : 08-Feb-2026
There is nothing worse than turning on your AC during the scorching Delhi summer, only to find it blowing warm air. The fan is spinning, the compressor is humming, but the room just won’t cool down.
When you call a technician, the diagnosis is often the same: "Sir/Ma'am, the AC gas has leaked."
Many customers ask us, "My AC is a closed machine. How does the gas just disappear? Does it get used up like petrol?"
The answer is No. AC gas (refrigerant) is not consumed; it circulates in a closed loop. If the gas level drops, it means there is a leak.
At Delhi Daily Service (DDS), we believe in educating our customers. Here is everything you need to know about why AC gas leaks happen and how we fix them properly.
Top 4 Reasons Why AC Gas Leaks
1. Corrosion and Rust (The #1 Enemy in Delhi)
This is the most common cause of gas leakage in Delhi-NCR. The condenser coils and pipes in your AC are made of copper.
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The Problem: Pollution, dust, and humidity in the air react with the copper. If you live near an open drain (nala) or an industrial area, the chemicals in the air cause Formicary Corrosion.
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The Result: This creates tiny, pin-hole leaks in the copper pipes that are often invisible to the naked eye, allowing gas to escape slowly.
2. Vibration & Loose Joints
Your AC’s outdoor unit vibrates constantly when the compressor is running.
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The copper pipes are connected using flare nuts and joints.
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Over time, this constant vibration can loosen these nuts or cause friction between two pipes, leading to cracks and leakage.
3. Improper Installation
Sometimes, even a brand-new AC can leak gas within a few months. This is usually due to poor workmanship.
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If the installer didn't tighten the flare nuts properly or bent the copper pipe too sharply (causing a stress crack), a leak is inevitable.
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The DDS Promise: This is why professional installation by experts like Delhi Daily Service is crucial for the long life of your unit.
4. Weak Welding Points
ACs have multiple internal joints that are welded (brazed) together. Over years of usage, due to high pressure and temperature fluctuations, these welding spots can become weak or brittle, causing them to crack and leak.
How Do You Know If You Have a Gas Leak? (Warning Signs)
Watch out for these symptoms before your AC stops working completely:
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Low Cooling: The AC runs for hours, but the temperature doesn't drop effectively.
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Ice Formation: If you see white ice freezing on the discharge pipe (the thin pipe on the outdoor unit) or the indoor cooling coil, it is a classic sign of low gas pressure.
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Hissing Sound: A bubbling or hissing noise coming from the indoor unit indicates an active leak.
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High Electricity Bills: When gas is low, your compressor has to work twice as hard to cool the room, spiking your power consumption.
The Solution: Why "Top-Up" is a Waste of Money
If a technician visits your home and says, "Gas is low, let me just top it up," do not agree immediately.
If you refill gas without fixing the leak, it will simply leak out again in a few weeks or months. You will end up paying for gas charging again and again.
The Delhi Daily Service (DDS) Approach: We don't believe in shortcuts. Our standard procedure for gas leakage is:
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Leak Testing: We use Nitrogen Pressure Testing to identify the exact location of the leak.
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Repairing: We repair the leak using proper brazing (welding) techniques. If the coil is too corroded (rotten), we advise replacing the coil for a permanent fix.
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Vacuum & Refill: Before filling new gas, we vacuum the system to remove moisture and air. Only then do we refill the refrigerant to the manufacturer's recommended pressure.
Is your AC not cooling? Don't waste money on temporary fixes.
Call Delhi Daily Service (DDS) today! We provide honest, transparent, and professional AC repair services across Delhi.
📞 Contact Us: [9821221877] 🌐 Website: [https://delhidailyservice.com/ac-service-repair]