Things You Need To Know About Aircon Unit Gas Top-Up

What is Aircon Gas Top-Up? 

An aircon gas top-up mainly involves refilling the refrigerant storage unit with the appropriate chemical coolant. Because the aircon unit requires a certain amount of gas to operate smoothly, if there’s insufficient gas, the aircon unit will perform poorly. Moreover, this can lead to unwanted malfunctions and even break down. This procedure allows your aircon unit to continue cooling your office or room, and it also ensures the maximum efficiency of your aircon unit

Why is Aircon Gas Top Up important? 

If you want your aircon unit to be at its maximum efficiency at any time of the day, then you’ll have to perform aircon gas top-up as often as it should. Here are some important reasons why aircon gas top-up is a must: 

1) It allows your aircon unit to function at maximum energy efficiency.

2) It prevents a snowball of mechanical faults that may arise due to low gas levels.

3) It allows the aircon unit to cool at an exact room temperature like it’s supposed to.

4) Having your aircon unit get a gas top-up timely and regularly will keep your aircon unit trouble-free.

How often do you need Aircon Gas Top-Up? 

Most of the time, you should call for a professional aircon servicing company to top up your aircon unit once every 1 – 3 years. Nonetheless, there are customers who also choose to top up their aircon gas every 6 months. It could be due to minuscule leaks that are inevitable in every aircon unit.

Signs that you need Aircon Gas Top-Up:

Let’s look at the signs as to when exactly do you need an Aircon Gas Top-Up:

1) Aircon unit is always running but it doesn’t cool your home

R-22 refrigerant is what absorbs the heat in your air. Without enough of it, your aircon unit can’t absorb enough heat to cool the air. When your aircon unit is running all day but the air never seems to get cold, this could be because you don’t have enough R-22.

2) Electric bills are higher than before

If your aircon unit is running all day and all night, or at least more than it should be, you’ll probably notice the difference in your electric bill. If you see a spike in your bill that’s not just the normal jump you see during hot weather, but much more expensive, it could be a sign your aircon unit needs freon.

3) Vents are blowing warm air

Without enough refrigerant it needs, your aircon unit can’t absorb the heat in the air. This will result in the air coming out of your vents that is not cool enough, or maybe even warm. You may even have less air blowing out of your vents.

4) There is a buildup of ice on the refrigerant line

When you check your aircon unit, or your outdoor central aircon unit with the fan, and see ice building up on the refrigerant line, then you may be low on freon.

When your aircon unit is low on freon, the evaporator coil gets too cold and causes the cold liquid refrigerant to flow back to the refrigerant line. This will cause the surrounding moisture on the refrigerant line to freeze up. This is a sign you need freon.

If you do not get this aircon issue repaired, the freon can make its way to the compressor unit. If this happens, it can damage or destroy your compressor, creating an even more expensive aircon issue. You may even end up having to replace the entire aircon unit.

5) A hissing or bubbling sound from the refrigerant line

If you are low on freon, it has to be because you have a leak in the refrigerant line. If there is a leak, it’s possible you may hear a faint sound of the freon leaking out of the line, which can sound like a hiss or maybe a bubbling sound.

Important things to remember: 

What are the types of gas for your aircon unit? 

1) R-22 Gas

This type of gas has been used in early or in old aircon unit models. In addition, it used to be common among car aircon, mini-split units, portable units, window units, and refrigeration systems. Because of its ozone-depleting content, the usage of R-22 gas has decreased over the years. In fact, its production and use in commercial and industrial aircon have been prohibited.

2) R-410 Gas 

R-410 or what they usually call Puron is what most aircon unit installers use today. This is because of its reduced environmental impact, low production cost, and its efficiency. 

3) R-404 Gas

R-404 gas was once considered as an alternative for R-22, its usage in modern aircon unit installations has been either prohibited or phased out in most countries. This is due to its toxicity and its harmful impact on the environment.

Here are other facts about Aircon Gas Top-Up: 

1) Aircon Gas Top-Up is necessary 

2) Aircon Gas Top-Up is a part of a regular maintenance‍

3) You need to call a professional aircon servicing company to get things properly done.

4) Aircon Gas Top-Up helps in decreasing your energy consumption

5) Aircon Gas Top-Up is definitely connected with the overall performance of your aircon unit


It’s always a good time to talk about the common issues that aircon units have. This way, you’ll be able to spot if there are problems with your unit or not and prepare for its replacement accordingly. If you require our aircon servicing services, Whatsapp us at +65 9222 4141 for a fast and transparent quote.

338 Aircon Servicing Singapore provides an extensive range of Aircon Services including Aircon Servicing, Aircon Repairs, Aircon Installation of the best aircon brands, Chemical Overhaul, Gas Top-up, Aircon Leaking Water, and Aircon Not Cold Fix, and more. We have a team of professional technicians who are equipped with vast knowledge and experience in the Aircon industry. 

We have over 15 years of experience in dealing with aircon works and have completed thousands of aircon works for both residential (Landed, Condo, and HDB) and commercial. We are a highly recommended Aircon Company in Singapore, with many delighted customers and reviews over the years on Google and Facebook. 

WhatsApp us at +65 9222 4141 for a transparent quotation and honest pricing for all your aircon needs or Call us at +65 9222 4141. We offer a fast and efficient service to serve any of your aircon needs!