3 Possible Reasons Your Aircon is Making a Hissing Sound

It’s never good news when your aircon units start making odd sounds; one of which is the hissing noise that most likely indicates a larger issue at hand. It’s important, therefore, to not ignore those sounds and to seek professional aircon servicing in Singapore to deal with any potential issues underlying said hissing sound. If you’re experiencing this, here are some possible reasons of varying severity and ways to identify the symptoms.

Refrigerant Leakage

Much like the hissing sound you’d normally hear when opening a can of soda, the same hissing sound can also be emitted from the compressor of your aircon unit if there’s a refrigerant leakage. As the system is pressurised, the hissing sound occurs as it loses pressure due to the leakage if it’s large enough. In other words, by the time you hear it, it could potentially be a sign of a significant leakage. Regular aircon maintenance in Singapore can help prevent or detect refrigerant leakages before they become too severe. 

You may also check for other signs of refrigerant leakage, such as the formation of ice on your aircon unit; warm air blowing from your vents; or electricity bills that are higher than normal.

Learn more: 4 Causes of Aircon Gas Leaks

Leaking Air Ducts

Source: Aeroseal

Like most appliances, parts in your aircon, such as the air ducts, wear out over time. When that happens, gaps, cracks, or tears can develop, allowing air to escape through them. Consequently, the force of the air leakage will then cause a hissing or high-pitched whistling sound to be emitted through the vents. 

Other telltale signs of leaking air ducts include having difficulty keeping your home cool, as the cooled air is escaping into your walls, ceilings, and other crevasses; and an increase in electricity bills, as your aircon is exerting itself even more in an effort to cool your home. This often calls for timely aircon servicing in Singapore, as the longer you put it off, the longer you’ll need to pay more for electricity.

High Pressure in the Compressor

The compressor is an integral part of your aircon that moves the refrigerant through your system to effectively cool the air it takes in. However, when there’s excess pressure, the compressor can also start making a hissing or screeching sound in the outdoor unit. If you’re hearing these sounds for about 10 to 15 seconds when your aircon starts up, or if your system starts and stops more than usual, it could be an indication of built-up pressure in the compressor. As you’ll need the right tools and knowledge to properly pressurise your system in order to get it back on track, we recommend getting professional aircon servicing in Singapore instead.

While some aircon issues can be fixed yourself, the hissing noise isn’t one of them. Most of the symptoms behind it, as well as the solutions required are highly technical, such as gauging the correct amount of refrigerant to refill your system with, as well as knowing how to properly seal your air ducts. This is why a trained professional would be better suited to tackling these issues. Here at GoodCool, we offer one of the lowest aircon servicing prices in Singapore without skimping on quality or reliability, as a way to encourage more homeowners to safeguard their aircon units prolong their shelf lives. For more information about our services, please visit our website.