Air Conditioning Sounds: Which Ones Should You Ignore?

Air conditioning keeps us cool and comfortable. But even the best air-conditioning units only last 15-20 years. You may find that odd squeaks, unique whistles, and faint hums are all part of your experience after you’ve owned your unit for a while. Keep watching to find out when sounds require your immediate attention, and which you can ignore!


If your air-conditioner emits a high-pitched screaming sound, you need to turn the machine off and call a professional immediately. This sound is likely the result of a refrigeration leak, which can cause permanent damage to your air conditioner. It can also damage your family’s health. Sudden doses of freon may cause heart palpitations in those disposed to them. It can also cause skin irritations.


Sometimes, blower and fan noises cause squeaks to get emitted through your air conditioning system. Your blower wheel may also emit squealing sounds while it is starting up. You will need to use a little discretion to determine if the noise is a normal part of a startup, or something new.


Your air conditioner may click during the start-up. This may just be your thermostat communicating with your unit. Constant clicking, however, could signal an electrical problem. There could also be something damaging your blower fan. In a central air conditioning system, the blower motor pushes air through the system at varying speeds. A properly functioning blower is critical for maintaining comfortable temperatures throughout your home.


A banging noise may indicate that something got loose inside your air conditioning system. Often, it is the crankshaft connecting to the rod inside your compressor. Banging can also indicate that your outdoor unit is hitting something. It may be close to an obstruction that shouldn’t be there. You may also hear banging when your air conditioner’s fan comes loose from its mounts. It could wobble and hit your compressor’s protective cage.


While light humming may simply indicate that your unit is “humming along,” loud humming indicates that there may be parts loose within your unit as well as refrigerant piping issues. If your air conditioner gets worn down, wires can get dislodged and lose contact with the major power source. This can disrupt airflow and cause malfunctioning. Exposed wires can also become fire hazards. Any loud humming needs to get immediately checked out by a professional.


A buzzing sound coming from inside your air conditioner could indicate loose parts or debris inside or outside of your unit. It may also tell you that your fan blades are out of balance. The blades on your fan are metal and can bend and break, especially if you have an outdoor unit. If a blade gets loose, it can hit other air conditioner components as it spins. Loose fan blades can be hazardous to your entire air conditioner system, and they should get replaced as soon as they get discovered.


A gurgling noise means that your drain line is clogged or cracked. The drain line is the exit unit for air collected by the evaporator coil as air passes over it. It removes humidity from the air and converts it into water. If you feel comfortable, turn off the unit and inspect the drain line. Otherwise, contact a professional.
Even the newest systems emit musical air conditioning sounds occasionally. If, however, you hear unusual screaming, buzzing, or banging coming from your air conditioner, it is time to call a qualified professional. For more info, contact us today. And if you enjoyed this video, make sure to like, comment, and subscribe.