Why is My AC Unit Making a Hissing Sound?
A hissing noise from your air conditioning unit is not necessarily something that needs to cause alarm, but you must ask a professional. There are several reasons that your AC unit makes a hissing noise. The Compressor One reason that your AC unit makes a hissing noise is because of the compressor. An air conditioner’s compressor is what makes the entire system run, and it contains refrigerant. Refrigerant is a cool liquid that has low pressure. When the compressor begins to work, it changes the refrigerant into a gas that has high pressure. The compressor also turns this high-pressure gas into a liquid again. As it cools the refrigerant, the air conditioning system can create cool air. Without refrigerant, your AC unit would be unable to cool your house. If the refrigerant is at a low-pressure state, it is cool, and when it comes in contact with warm air, it lowers the temperature of the air. If the refrigerant is at a high-pressure state, it is hot, and when it comes in contact with cool air, it condenses. This causes the temperature to rise. The description above takes place inside the outside unit of your air conditioning system in the