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Why Is My AC Compressor Making a Loud Noise?

Air Experts technician talking to a homeowner in Raleigh, NC

Has your air conditioner started making strange noises during operation? You might be dealing with a faulty compressor. AC compressors are essential components within your unit that can cause serious system problems and indoor discomfort when they malfunction.

A failing compressor creates a noisy unit and leads to severe damage. They can even be dangerous to repair without the right tools or training. Read on to find out what might be causing the clanking in your compressor.

What Is an AC Compressor?

Many HVAC technicians lovingly refer to your AC compressor as the “heart” of your air conditioner. The compressor is the most vital (and often the most costly) component of your cooling system. It’s responsible for keeping your home cool and comfortable and is the vessel through which refrigerant is circulated during the heat exchange process.

Additionally, the electricity that courses through your compressor powers the air conditioner, allowing it to absorb heat from your home, create cool air, and circulate it throughout the home. 

What Causes AC Compressor Noises?

Air conditioning compressors can make many noises, each indicating a separate underlying issue. The following are just some of the most commonly heard compressor noises and their possible causes: 

  • Banging: When your compressor makes banging noises, a loose or damaged connecting rod, crankshaft, or piston pin inside may be causing the issue.
  • Clanking: Loose or unbalanced compressor parts can also create a clanking noise, which may escalate to loud banging when left untreated.
  • Squealing: If you hear a high-pitched squealing sound from your outdoor unit, there’s likely a motor malfunction affecting your compressor system.
  • Hissing: When a loud hissing noise lasts 10 to 15 minutes and then stops, this can indicate a high-pressure buildup in your compressor, which can be extremely dangerous.
  • Humming: Usually, humming sounds indicate an electrical issue with the compressor, especially if it hums and refuses to start.

Air compressor problems can cause serious discomfort in your home when left untreated. When you notice loud noises coming from your compressor, you must correct the problem before repair needs escalate to requiring an AC replacement.

Professional vs. DIY Air Conditioner Repair

While correcting a compressor issue might seem like an easy fix, we assure you there’s much more involved than simply tightening a few loose components. Many motorized and electrical parts within your air conditioning system require years of industry training to navigate and repair successfully. By hiring a cooling specialist to repair your air compressor, you’ll:

  • Receive guaranteed service from a specially trained professional
  • Prevent electric shock or electrocution
  • Avoid the need for total system replacement
  • Identify additional repair needs before escalation

Schedule Emergency AC Repair with the Air Experts

For over 35 years, Air Experts has proudly delivered the long-lasting air conditioning repair services that North Carolina residents can trust. Our top priority is providing the best possible service to our friends and neighbors here in Raleigh. We’re committed to your 100% satisfaction, offering the following Super Seven Guarantees to all of our valued customers: 

  • Comfort Guarantee
  • No Frustration Guarantee
  • Low Price Guarantee
  • 30% Utility Savings Guarantee
  • Property Protection Guarantee
  • Installation Date Guarantee
  • Timeliness Guarantee

Don’t let your air compressor repair needs go ignored. Contact the Air Experts to schedule emergency air conditioning repair today.

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