How do I know if my aircon gas needs to be topped up?

 

Aircon Gas Topup

In Singapore’s hot and humid weather, a well-functioning air conditioner isn’t just a luxury—it’s a necessity. But even the best aircon system can run into performance issues over time, especially if it’s low on refrigerant gas.

Refrigerant, often called “aircon gas,” is the vital substance that cools the air in your home or office. Unlike fuel in a car, refrigerant doesn’t get "used up" under normal operation. So if you’re running low, it's likely due to a leak or other underlying issue. But how can you tell when it’s time for a top-up?

At LetsCool Aircon and Services in Singapore, we frequently help homeowners and businesses diagnose and resolve refrigerant-related problems. In this article, we’ll explore the signs your aircon gas may be low, the causes behind it, and what to do next. View more. 

What Is Aircon Gas and Why Is It Important?

Aircon gas (or refrigerant) is a chemical compound that absorbs heat from your room and releases it outdoors through a heat exchange process. This is what makes your air feel cool and comfortable.

When your system is low on refrigerant, the cooling cycle is disrupted. The result? A sluggish aircon that fails to cool your room effectively and works harder than it should—causing increased energy bills and wear on your system.

Signs Your Aircon Gas Might Be Low

1. Your Aircon Is Blowing Warm or Less Cold Air

If you notice your aircon is running but the air isn’t as cold as it used to be—or it’s blowing warm air altogether—this is a strong sign your system is low on gas.

2. Takes Longer to Cool the Room

An aircon low on gas struggles to reach the desired temperature. If your room takes much longer to cool than usual, or doesn’t cool down at all, low refrigerant may be the reason.

3. Ice Formation on the Evaporator Coil

If you peek at your indoor unit and notice ice or frost forming on the coil, it’s a clear indication of a refrigerant problem. The lack of gas can cause the coil temperature to drop below freezing, leading to condensation and ice buildup.

4. Higher Than Usual Energy Bills

An undercharged system works overtime to maintain your settings. If your electricity bill has unexpectedly spiked, your aircon could be overworking due to low refrigerant levels.

5. Hissing or Bubbling Sounds

Unusual hissing or bubbling noises from the aircon can indicate a refrigerant leak. The sound comes from gas escaping under pressure—something that should be inspected immediately by professionals.

6. Water Leaks from the Indoor Unit

While water leakage can be due to a clogged drainpipe, it can also be a result of a frozen evaporator coil melting rapidly once the unit is turned off. Low refrigerant is often behind the freeze.

What Causes Low Refrigerant Levels?

❌ Leaks in the Refrigerant Line

Tiny holes or cracks in the copper piping can cause the gas to slowly leak out over time. This is the most common cause of low refrigerant and needs to be properly sealed before topping up.

❌ Poor Installation Practices

Improper connections, incorrect gas levels, or failure to vacuum the line during installation can lead to long-term gas loss.

❌ Corrosion or Wear and Tear

Older systems may develop leaks due to corrosion in the coil or fittings, especially if regular maintenance is neglected.

What Should You Do If You Suspect Low Aircon Gas?

✅ Call a Certified Aircon Technician

Topping up refrigerant isn’t a DIY job. The process involves checking for leaks, vacuuming the system, and recharging it with the correct type and amount of refrigerant.

At LetsCool Aircon and Services, we use industry-grade leak detection tools, pressure gauges, and follow manufacturer guidelines to ensure safe and accurate gas top-ups.

✅ Don’t Just Refill—Fix the Leak

Topping up without fixing the root cause is a temporary solution. Our team always checks for and repairs leaks before refilling, preventing repeated breakdowns and long-term damage.

Types of Refrigerant We Use

Different systems use different refrigerants. Common types include:

• R22 (phased out due to environmental impact)
  
  

• R410A (commonly used in newer models)
  
  

• R32 (environmentally friendly, high-efficiency gas)
  
  

LetsCool Aircon and Services works with all major refrigerant types and ensures compatibility with your unit during servicing.

How Often Should You Top Up Aircon Gas?

Under normal conditions, you shouldn’t need to top up your aircon gas at all. If your system is sealed and installed properly, it should retain the same amount of refrigerant for years.

However, if your unit is older, or if there’s a leak, you may need to refill it every 1–2 years—but only after resolving the cause of the loss.

Why Choose LetsCool Aircon and Services in Singapore?

With more than 25 years of experience, LetsCool is trusted by homes and businesses across Singapore for expert aircon servicing, installation, and maintenance.

When you call us for a refrigerant check or top-up, you get:

• ✅ Accurate refrigerant pressure checks
  
  

• ✅ Leak detection and repairs before gas refill
  
  

• ✅ Environmentally friendly refrigerant handling
  
  

• ✅ Skilled technicians for all aircon brands—Daikin, Mitsubishi, Panasonic, Midea & more
  
  

• ✅ Transparent pricing and no hidden costs
  
  

• ✅ 90-day workmanship warranty on servicing
  
  

Whether you have a single wall unit or a multi-system setup, we provide prompt and professional aircon gas top-up services to restore your comfort.

Final Thoughts

If your aircon isn’t cooling the way it used to, don’t ignore the signs. Low refrigerant levels can lead to poor performance, higher energy bills, and permanent damage to your system.

Let the professionals handle it—Call LetsCool Aircon and Services in Singapore today at +65 9862 3678 for a thorough aircon inspection and gas top-up service. We’ll get your cooling back on track quickly, safely, and affordably.

11 Mandai Estate,

 #05-15 Eldix,

Singapore 729908

Mail ID: info@letscoolaircon.com.sg

Call: +65 9862 3678  (or) WhatsApp us: https://wa.me/6598623678

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