Why Is My Air Conditioning Unit Making Noises?

Air conditioner units are often the unsung heroes of summertime. They keep you and your family cool during the sweltering heat of a Maryland summer and do so quietly and efficiently.

So what happens when your outdoor AC unit breaks its peaceful, summertime vibe and starts making unusual, loud or strange noises? In most cases, something is awry, and the unit should be inspected by an HVAC technician. Not all air conditioning noises are created equal, though, and some indicate a minor repair, while others involve a more serious issue.

If you’re experiencing any issues with your air conditioning unit, contact the NATE-certified technicians at Grove Heating & Cooling. For more than 15 years, we’ve been Maryland’s trusted air conditioner repair, installation and service company. Contact us today if you’re experiencing any of the following noises from your outdoor condenser unit.

Common Air Conditioning Noises and What They Mean

From clanking to clicking to humming, get these common air conditioning noises checked out before they lead to an expensive repair or replacement of your air conditioner. Some common noises we’ve troubleshooted and repaired, include:


A buzzing sound coming from the outdoor unit could mean the filter needs changed, a loose part or debris in the unit. A buzzing noise could also indicate the fan motor needs to be replaced. 


A clicking sound could be the result of a bad relay switch going on and off. It could also be a defective thermostat. Have your HVAC technician inspect the unit’s electrical components to diagnose the issue. In other cases, a clicking sound might be normal. But if the sound suddenly appears or becomes louder, check with a technician. Like a buzzing sound, clicking can be a sign of debris in the system.


Loud banging noises are commonly caused by loose or broken internal parts that have caused the compressor, fan or blower to function improperly.

Screaming or Hissing

A high-pitched screaming noise – or a hissing sound – is not just annoying, but it could indicate a refrigerant leak. Refrigerant leaks are a serious issue that can cause health problems and damage the unit. Call a technician as soon as possible to inspect the air conditioner.


A clanking noise may mean the compressor is loose, or a component inside the compressor is loose, and it needs a replacement part.


A humming sound could indicate loose screws or issues with the electrical wiring or refrigerant line. It could also be a sign the motor needs to be replaced. Call the technicians at Grove to diagnose the issue.

Trust Grove for Air Conditioner Repair

Grove Heating & Cooling repairs and services all makes and models of air conditioners. Our technicians are experienced in handling all types of AC troubleshooting and repairs.

Here are just a few of the air conditioning repair services we offer:

  • Compressor replacement
  • Refrigerant leak and recharge
  • Fan belt replacement
  • Fan blade replacement
  • Blower motor replacement
  • Electrical component repairs
  • And much more!

Contact Grove Today

When the temperatures heat up this summer, don’t get stuck with a broken air conditioner. You can count on Grove Heating & Cooling day or night for exceptional and affordable work. We back all of our work, whether it be air conditioning repairs, installations or replacements. Contact Grove Heating & Cooling today!

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