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Aircon Needs Gas

How To Check If Your Aircon Needs Gas: A DIY Guide

When your aircon needs gas, it gives you certain indications. Understanding these indications is crucial for the proper upkeep of your unit. Neglecting these indications may disturb your cooling system when you need it the most. Refrigerant is a critical component in your aircon system and plays a pivotal role in the cooling process, keeping your indoor environment comfortable. 

Over time, due to various factors, the refrigerant level in your aircon unit may be depleted, leading to decreased efficiency and performance. In this comprehensive guide, we will discuss the importance of refrigerant, signs indicating low levels, and steps to address this issue effectively.

Check If Aircon Needs Gas

The aircon needs freon gas for maintaining the cooling of the indoor environment. This refrigerant or freon gas recycles upon running the aircon and maintains its level. However, due to some constraints, it can get lower over time, and it’s that time when your aircon needs gas top up. You can check the aircon gas level yourself because the process is quite simple. 

Moreover, if your aircon needs regassing, it’s better to contact professionals like LS Aircon Servicing Singapore because regassing is a complicated process. Therefore, adopting a DIY approach for this task may cause further complications. However, if you have prior experience doing it successfully, you may give it a go.

The Importance of Refrigerant

Refrigerant is a substance responsible for absorbing heat from indoor air and transferring it outside, allowing your aircon system to cool the indoor space efficiently. It undergoes a continuous cycle of compression and expansion, enabling the removal of heat from your home. 

With an adequate level of refrigerant, your aircon unit will be able to maintain optimal cooling, resulting in discomfort and potentially higher energy bills. Therefore, it can hurt you multi-dimensionally if you do not take it up in a timely manner.

Check Aircon Needs Gas

Signs of Low Refrigerant Levels

Recognizing the signs of low refrigerant levels is essential for timely intervention and preventing further damage to your aircon system. Here are some common indicators to watch out for:

Reduced Cooling Capacity: If you notice that your aircon is taking longer than usual to cool the room or isn’t cooling effectively, it could be a sign that your aircon needs regas. It is important to notice if there is any other reason behind this issue, like frequent opening of the door, thermostat settings, and other common issues.

Warm Air Output: When the air blowing from your vents feels warmer than the set temperature, it may indicate a refrigerant issue. Therefore, it is a situation when your aircon needs gas and you need to contact a professional to do it for you.

Ice Buildup: Excessive ice formation on the evaporator coils is a clear indication of low refrigerant levels, as the coils are unable to absorb enough heat. This is the most clear evidence of an aircon gas leakage or regassing requirement.

Hissing or Bubbling Noises: Unusual sounds, such as hissing or bubbling, coming from your AC unit could signal a refrigerant leak or inadequate levels.

DIY Steps to Check Refrigerant Levels

While professional expertise is recommended for accurate assessment and handling of refrigerant, there are some basic steps you can take to check the aircon gas level:

Visual Inspection: Examine your aircon unit for any visible signs of refrigerant leaks, such as oily spots or moisture around the refrigerant lines. If you find these signs, you need aircon regassing.

Airflow and Temperature Assessment: Turn on your aircon and observe the airflow and temperature. Weak airflow and warmer air output could indicate low refrigerant levels.

Evaporator Coil Examination: Inspect the evaporator coils for frost or ice buildup, as this is a common symptom of insufficient refrigerant.

Listening for Abnormal Sounds: Pay attention to any unusual noises, such as hissing or bubbling, which may suggest a refrigerant-related issue.

How To Check If Your Aircon Needs Gas

Interpreting DIY Results and Next Steps

After conducting the DIY checks, it’s important to interpret the results and take appropriate action:

Professional Consultation: If your DIY assessment points to low refrigerant levels or a potential leak, it’s advisable to contact a licensed HVAC technician for a thorough inspection. It is usually difficult for a common homeowner to refill the aircon if the aircon needs gas.

Refrigerant Refill or Leak Repair: Based on the technician’s assessment, they may recommend refilling the refrigerant or repairing any leaks in the system to restore optimal performance.

Regular Maintenance: To prevent future refrigerant issues, schedule regular maintenance for your aircon system, including refrigerant level checks and system tune-ups.


If your DIY assessment points out that your aircon needs gas, you need to contact a professional promptly. Maintaining adequate refrigerant levels is essential for the efficient operation of your air conditioning system. By understanding the signs of low refrigerant levels and conducting basic DIY checks, you can identify potential issues early on and take proactive measures. 

However, for accurate diagnosis and professional handling of refrigerant, it’s crucial to rely on qualified HVAC technicians. Regular maintenance and timely interventions will ensure that your aircon system performs optimally, keeping your indoor environment comfortable and energy-efficient.