Do you know what is unique about today’s air conditioning technologies? Technological innovation in AC types and HVAC design trends have made things easier for us, especially regarding usage, performance, and cost. One common thing in every AC type and design is AC gas, also known as AC refrigerant, which often leaks because of our carelessness. But how do we know about this mishap with our air conditioner?  We need assistance from experts. Although doing so alone is not recommended, a few signs indicate gas leaks. Here, we will inform you about some tricks to check AC gas without a gauge, whether it is recommended, and the importance of calling an expert for a gas inspection.

Ways to Check AC Gas Without A Gauge

Ways to Check AC Gas Without A Gauge

Although it is not advised to perform gas inspections independently, there are a few indicators that your air conditioning unit may have low refrigerant levels. Remember that these indicators may reveal other issues with your AC system.

Visual Examine

A buildup of ice on the gas pipes close to the evaporator coil is one of the warning indicators to watch for. It can point to a low refrigerant concentration. On the other hand, heavy frost on the suction line may indicate a blockage or overcharge. A broken condenser fin, blocked coils, and filthy filters can all reduce cooling performance and resemble refrigerant problems.

Temperature Checks

Feeling the refrigerant lines can give you a general idea, but it’s not a conclusive test. The thinner tube, or suction line, should feel chilly to the touch rather than freezing. The thicker tube, or discharge line, will be heated. If this is much different, there may be an AC refrigerant issue.

Airflow Evaluation

Examine the amount of air leaving the vents. It ought to be cold and steady. In contrast, weak or uneven airflow may indicate low refrigerant or limited airflow caused by blocked evaporator coils or filthy filters.

Strange Sounds

Check the device for any strange noises. Sounds such as hissing or bubbling may indicate a leak, but screaming or grinding sounds may signify problems with the compressor. Although they have nothing to do with the refrigerant level directly, these can indicate systemic issues.

Why We Should Not Check AC Gas Without A Gauge?

Why We Should Not Check AC Gas Without A Gauge

Many ask if checking the gas in the air conditioner without a gauge is okay. Even if some individuals try, accurate results are rarely correct. These do-it-yourself inspections are not advised, though, for several reasons.

Refrigerant pressure, closely correlated with refrigerant levels, may be precisely measured using gauges. At best, DIY approaches need to provide an approximate estimate. Some serious issues, such as compressor failure and system shutdown, can arise from undercharging or overcharging your air conditioner with refrigerant.

DIY inspections may only find severe cases, such as an empty system. They are unlikely to detect small leaks that gradually lower refrigerant levels. A little leak might lie undiscovered for months, resulting in ineffective cooling and higher energy costs. 

One way is to monitor the temperature of the refrigerant lines. If you breathe or touch refrigerant, it may be poisonous, so it can be dangerous if you get into contact with it if there is a leak. Experts have the proper training and safety gear to handle everything safely.

It is likely riskier to attempt self-repairing low-refrigerant levels. You must braze or solder the lines to guarantee a proper seal, but you will require some experience and specific instruments. On the other hand, maintenance specialists without experience may worsen the leak and lose even more refrigerant if they attempt AC repairs without the right tools and skills. 

Why Call A Professional HVAC Technician?

Why Call A Professional HVAC Technician

A certified HVAC specialist can examine and fix refrigerant problems in your air conditioning equipment with several benefits:

  • Experts are knowledgeable and have essential resources to identify the accurate reason for your air conditioning problem, whether it is low refrigerant, a leak, or something else entirely, and guarantee a precise diagnosis.
  • Professionals are skilled at handling gas safely. Before repairs commence, they retrieve any leftover refrigerant and dispose of it, recharge it, and expel it in an environmentally safe manner.
  • Experts possess the expertise and equipment to safely seal leaks and ensure your air conditioning system runs smoothly. Additionally, they can suggest preventive maintenance tips to stop refrigerant leaks in the future.
  • When you hire a specialist, you may feel secure knowing that your air conditioner is in capable hands. Knowing that your system is fixed correctly and operating securely provides peace of mind. 


It is not a good idea to check gas without a gauge or do refrigerant repairs without a gauge, even if there is a ton of DIY guidance online. It could be harmful and ineffectual. At the same time, an expert HVAC technician has the knowledge and resources necessary to safely and correctly diagnose and resolve AC issues. Don’t attempt to fix yourself further and endanger your health or AC system. For maximum output, contact a professional from VAC Technical Services


Does filling AC gas fall in the maintenance checklist?

You may not find filling AC refrigerant on a typical AC maintenance schedule. Regular top-ups should be optional for a well-operating system, even if refrigerant levels might eventually run low. Routine maintenance aims to keep the system effective and clean, which can help stop refrigerant leakage.

How much does an AC gas cost in Dubai?

The exact cost of AC gas in Dubai can vary depending on factors like:

  • The type of refrigerant used (e.g., R-134a, R-410a).
  • The amount of gas needed (depends on your AC unit size).
  • Whether it’s for a car or building usage.
  • The service provider you choose.

Why is AC gas Expensive?

Environmental restrictions are gradually replacing obsolete hazardous refrigerants, making AC gas or refrigerant more expensive. Restricted supply also raises prices. Furthermore, finding and fixing leaks requires expertise in identifying the source of the leak, making the necessary repairs, and correctly disposing of the refrigerant.

What is an AC gas filling process?

  • Find suction & discharge lines on the outdoor unit.
  • Connect pressure gauges to the manifold.
  • Open the valve to release air from the lines.
  • Turn on your AC and watch the pressure gauge.
  • Open the valve for short bursts to add refrigerant.
  • Ensure pressure reaches an optimal level.