How To Fix A Noisy AC

How To Fix A Noisy AC

With more people working from their homes than ever before, it’s never been more important to make sure your home is a comfortable and quiet place to work. So, what do you do when it sounds more like a runaway freight train than an HVAC system? Let’s start by examining the noises you might hear from your HVAC system, the reasons you’re hearing them, and how to fix a noisy AC.

Whistling noise

If you’re hearing a low whistling noise when your AC is running that just doesn’t sound normal, it could be an indicator that you have a problem. Here are what some of the causes may be and how to fix a noisy AC:

  • Registers or vents aren’t sealed properly, and air is forced out around the edges causing a whistling sound. Tighten or replace worn registers or vents.
  • Leaks caused by holes or cracks in the duct work. Contact an HVAC professional for a ductwork inspection.
  • Fan settings are incorrect – If your fan settings are too high, it can overload the ductwork. Try adjusting the fan speed to a lower setting.
  • Air filter needs changing or cleaning – clogged or dirty filters can create noise and also make your system run less efficiently. Be sure to change your filters regularly. Advent Air offers an online filter shop. With our auto delivery option, you can get air filters delivered right to your door on a regular schedule.

Loud squealing or screeching

  • Just like the screeching sound your car makes when a belt malfunctions, the blower belt may be slipping or is just worn out.
  • Bearings in the motor may need lubricating – this is usually done during regular maintenance but if you haven’t had an HVAC tune-up lately, your motor can take a beating and can sound like it’s taking a beating. If you suspect either of the above, consult an HVAC professional.

Rattling noises

  • Outdoor unit isn’t level – when your unit isn’t properly leveled, it can cause a rattling sound.
  • Fan blades, bearings or motor are worn – if the sounds seem to be coming from the air handler or the fan motor, you’ll want an HVAC pro to assess what the problem is.
  • Closed vents – if you’ve got several vents closed, it can create noise and also force your system to work harder. Keep your vents open so that air can be distributed freely.
  • Ductwork needs cleaning – dust and debris can build up inside your ductwork impeding the airflow and causing a rattling noise. Try to schedule getting your ducts cleaned regularly.

The best way to keep your HVAC system from becoming the loudest voice in your home, is to stay on top of preventative maintenance. Being proactive can save not only save you time and the aggravation of all that noise, it can save you money on costly repairs down the road. Schedule your routine maintenance today by calling the professionals at Advent Air. We’re committed to the indoor quality of the air you and your family breathe every day.