Common Air Conditioner Noises That Shouldn’t Go Unaddressed

Oct 06, 2022

Heat and Air Conditioning, HVAC system service technician using measuring manifold gauge checking refrigerant and filling industrial air conditioner after duct cleaning maintenance outdoor compressor.Is a noisy air conditioner keeping you up at night? If so, it may be a sign that your unit needs some tending to, and you won’t want to ignore it. These common noises may not seem concerning to the untrained ear, but truth be told, they could be indicative of a major issue. Be sure to contact your local air conditioning repair company if your unit is making a:

Squealing Noise

It’s not uncommon for AC compressors to build up pressure over time. This high internal pressure can produce a squealing noise. With most air conditioners, this pressure will trigger a sensor that will shut down the unit entirely to prevent internal damage. But if your sensor isn’t working properly, this failsafe may not be in place. If you hear a squealing noise coming from your air conditioner, turn your unit off immediately and have a professional take a look.

Hissing Noise

A hissing noise coming from an air conditioner can often mean there is a refrigerant leak. Refrigerant is a chemical used to help an air conditioning unit cool a home. If a refrigerant leak does in fact exist in one of your unit’s lines or coils, you may also notice your air conditioner is running inefficiently. What’s more, a refrigerant leak can be harmful to humans, making it that much more imperative to call your local HVAC repair company right away if you notice your unit making a hissing noise.

Buzzing or Staticky Sound

As you may already know, your AC unit is powered by electricity. If you hear a buzzing noise coming from your air conditioner, it may be a result of an electrical problem related to its condenser fan motor, relay switch, or wires. Such electrical issues should be handled by a professional technician.

Clicking Noise

It’s normal for an air conditioner to making a clicking sound when it turns on, which happens when the thermostat is relaying a message to the unit outside. However, it’s not normal for an AC unit to product an audible clicking sound all the time. If your air conditioner is making a clicking noise but isn’t turning on, it may be an electrical issue. Or, if you notice the clicking sound is coming from your unit outside, it may be a problem with your compressor. Either way, you’ll want to call a professional right away.

Humming Sound

Again, it’s normal for your HVAC system to produce a light humming noise. But if the humming grows noticeably louder, that may be cause for concern. Loud humming may be a result of components inside the unit that have come loose and are causing the system to vibrate.

Central Florida’s Top Choice for AC Service & Repair

If your air conditioner is making unusual noises, it’s best to call an AC repair company you trust to investigate. Homeowners living in Central Florida can turn to the professionals at Belle Air. Our technicians have experience servicing units of all kinds, so there isn’t much we haven’t yet encountered. We also offer 24/7 emergency HVAC repairs for those concerning air conditioning noises that pop up in the middle of the night. Get in touch with us today to learn more about our services!