Gas Top Up

Gas Top Up

Refill your aircon’s refrigerant

aircon installation contractor

Fixing your leaking problems


Hot weather is more likely to make people cranky. Given Singapore’s hot tropical climate, a gas top-up is an operation one can’t stop. To help refresh the atmosphere you need cool air circulating in your home. Situations involving gas refills also tend to cause unsealed leakages.

You’ll need to have the air conditioning unit checked when dealing with such a situation. The inspection helps reveal any places where gas may have started leaking, paving the way to reseal. If this is over, the only remaining thing would be to supply gas to top up the machine. The top-up helps make sure the air conditioner gets back to its state as fast as possible. Normally, technicians will tell you that there are many instances that might need a gas upgrade. They include: using low quality copper, and installing the same incorrectly.

Aircon not cold and looking for aircon gas top up?

When you find like your air-conditioner does not cool properly, you might need to install your refrigerant. As part of our repair kit we will fix leaks and top up your refrigerant capacity.

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Scope of Work

Aircon Gas Top-up might be required after you have done regular maintenance activities with your air conditioner.

When it comes to upgrading air conditioner power, you should know there are two kinds of top-ups in Singapore. We have both the refrigerants R22 and R40.

The R22 is intended mainly for use on old systems. The R40 is for use in versions of the newer generation. After testing the air conditioner in use in your home or business premise, the technician gets to decide what refrigerant to use.

As described earlier, if you have leaky pipes or when there is a gas leak in your air conditioner system, a lack of refrigerant also comes around. Leakage causes the air-conditioner to work harder than usual to keep delivering cool air to your house.

If you find that your house has unexpectedly become warm and the air conditioner unit is working, it means the refrigerant gas may have run out of service.

Service includes:

  • Cleaning & testing of the air filter and front panel
  • Testing of the bio-pure/deodorising filter
  • Bushing & checking of the indoor coil
  • Cleaning & checking of the condenser coil

How It Works

An air conditioner uses liquid or gas as an air refrigerant which is supplied to cool a room or space. Freon or Puron are examples of such chemicals found inside the air-conditioner refrigerants.

In most situations, cooling chemicals inside an air-conditioner’s refrigerant do not get used up during the unit’s service life. Nevertheless, there are situations in which the refrigerant tank leaks and the solvent eventually empties the container out.

An aircon gas top up is an opportunity to re-fill your air-conditioner’s refrigerant storage tank with the chemical gas coolant used. The aircon mechanic first takes care of the hole or damage that allows the fluid to leak and then topping up to fill the newly patched container with refrigerating gas.

This technique will keep the air-conditioner cooling cycle running. It is also important to upgrade your refrigerant if possible to avoid the complete failure of your AC system due to low refrigerant gas levels.

Why Should You Check and Top Up Gas

Gas leaks occur to air-conditioners and directly impact the performance of the device. Apart from not getting cold enough in your room, the compressor doesn’t benefit from the gas’s cooling effect which eventually results it to overheat and malfunction. The evaporating coils accept the cold gas from the refrigerant, and the evaporator will stop operation if it is not cool. Chemical refrigerant leakage from your AC can be detrimental to the atmosphere if it gets into the water system.

Type of Gas Available for Top Up

Freon was in the past the chosen form of gas used as coolants in air-conditioning systems worldwide. Today, however, alternative chemicals are being used as refrigerants in modern air-conditioner models. Let’s explore today’s two most famous of those:

R22 Gas

The R22 gas used in air-conditioners is classified as HFC (Hydroflourocarbon), a form of chemical which affects the ozone layer of the atmosphere when released into the environment. Its use is now phasing out in the world with a few countries imposing a complete ban on the use of this gas in the manufacture of air-conditioning units.

It is still an important coolant for air-conditioning systems for systems which still use the R22 gas. Because of the low compressor displacement, producers used R22. This means that the compressor will be able to cool the air more quickly and will use less power to cool input air.

An R22 refrigerant also helps to absorb water which is created away from the refrigerant system during the cooling phase. This is essential to preventing the part of the refrigerant from bringing water into it which will influence how it functions.

R22 refrigerant is now a costly chemical when replacement is needed for the device. It is priced on a price per pound that can cost up hundreds of dollars. That can be expensive if the refrigerant is small.

R410 Ga

The R22 gas used throughout air-conditioners is classified as HFC (Hydroflourocarbon), a chemical type which affects the atmosphere’s ozone layer when released into the atmosphere. Its use is now phasing out in the world, with a few countries imposing a full ban on the use of this gas in air-conditioning device manufacture.

It is still an essential refrigerant for systems which still use the R22 gas for air conditioning systems. Owing to the low displacement of the compressor the producers used R22. This means the compressor can cool the air faster, and use less power to cool input air.

During the cooling process, an R22 refrigerant also helps to remove water that is generated away from the cooling system. This is necessary in order to prevent the part of the refrigerant from bringing in water which will affect how it functions.

R22 refrigerant is now an expensive chemical for the system when replacement is needed. It’s sold at a price per pound which could cost hundreds of dollars. If the refrigerant is low that can be costly.

leaking unit
leaky connection
gas refill

The Process of Top Up Gas

Aircon gas top-ups can only be carried out by a qualified technician in an appropriate and secure manner. They use a scale within your air-conditioning unit to test for refrigerant level. It will tell them how much gas must be loaded into the refrigerant tank.

A refrigerant tank is used to pump gas into the air-conditioner to return to normal gas levels. This will be checked back using the gas gauge to verify that there is enough refrigerant inside your AC. Your Aircon technician can use just the right form of gas to refill your supply of refrigerants. Using an R410 tank on an R22 tank, and vice versa, is not safe. Besides that, the technician will also prescribe repairs to the refrigerant device if it has damaged so it no longer leaks. Many faulty components need to be tested to ensure unit health.

Checking Refrigerant Level
A gas monitor will be used to test the refrigerant level indoors before gas top up aircon. This method will decide how much gas is required for the refrigerant storage to be filled.

Determining Gas Type and Aircon Gas Refill
Proper refilling requires the right form of gas being used. Using a refrigerant tank, if the form of gas is calculated, the refrigerant storage of your air condition unit will be refilled with the volume of gas needed so that the gas level returns to normal.

Rechecking Refrigerant Level
Your refrigerant storage must be reassessed using a gas gauge to ensure proper refrigerant is within your air conditioner unit. Otherwise, once the gas level is regular, we will inject aircon gas into your storage.

Repairing and Further Safety Checks
The refrigerant will also be tested for any damages to avoid any gas leakage to ensure protection of the entire device. Many damaged parts will be tested and replaced if necessary and nothing will be missed.


How much does top-up of aircon gas cost?
It usually costs around $50 to $80 depending on the type of gas and quantity required.

When should I top-up my aircon gas?
It depends on various factors that might require you to top up the gas on your AC. Usually you need to recycle gas after the device has been patched, or if there are issues with your AC. If your AC does not cold even after being switched on for a longer period and if there is ice in the refrigerant lines you may need some re-gassing.

What is the main cause of aircon gas leak?
The main cause of gas leakage is corrosion and friction rubbing together the refrigerant.


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