8 Noises Your AC Shouldn’t Make: Identifying and Fixing Issues

Air conditioners produce various sounds when running, from the faint hum of their fan blades to a soothing whoosh of airflow.

But it could be a telltale sign that something’s amiss with your cooling system when it starts making louder or unfamiliar noises reminiscent of rock concerts than soothing lullabies. Any strange grating, buzzing, or clanking sounds coming from it should not be ignored as an indicator that something’s amiss with its functioning.

This blog post is meant to help you better understand any unusual sounds that arise, their possible causes and how best to address them before they turn into more severe and costly problems. Be sure to click this link provided by Hurliman Heating If you are experiencing AC issues.

Identifying the issues

A malfunctioning or broken AC unit can create a variety of unusual noises; here are 8 of the most pressing to look out for:

  1. Banging or clanking: These sounds often indicate a broken or loose part inside the AC compressor, such as a piston pin, connecting rod, or crankshaft. The compressor itself might also be unbalanced.
  2. Buzzing: This could signify a variety of problems, including an electrical issue, loose parts, debris in either the indoor or outdoor unit, a malfunctioning fan motor, or a refrigerant leak.
  3. Clicking: While it’s normal for your AC to make clicking sounds when it starts up or shuts off, persistent or constant clicking could signal a defective relay or a failing thermostat.
  4. Squealing: High-pitched squealing noises might mean the belt connecting the blower to the motor has come off, or the motor bearing might be failing.
  5. Hissing or gurgling: This sound could indicate a significant refrigerant leak. If you hear a hissing noise, the refrigerant is likely leaking in large amounts, while a gurgling noise might indicate a slower leak.
  6. Rattling: This often signals loose debris in the system or a failing motor. A rattling noise might also mean the AC system is starting to deteriorate.
  7. Humming: While a faint hum is normal, excessive humming might indicate a starting capacitor problem or bad motor bearings.
  8. Whistling or screaming: These sounds could mean there’s a refrigerant leak or high internal pressure within the compressor, which is a serious issue.

Fixing the issues – Troubleshooting guide for unusual noises

Now that we’ve identified the potential problems, here are some troubleshooting tips to resolve these issues.

  1. Banging or clanking: Ensure all screws are tightened; loose parts can cause these sounds. If the noise persists, contact a professional, as there could be a broken part within the compressor.
  2. Buzzing: Check for loose parts and clear any debris in the indoor or outdoor unit. If the buzzing sound continues, an electrician should inspect the unit for potential electrical issues.
  3. Clicking: Try replacing the batteries in your thermostat. If the clicking continues, you may need to replace the thermostat or the relay.
  4. Squealing: Inspect the belt connecting the motor to the blower–it may need alignment or replacement. If the noise continues, contact a technician to inspect the motor bearings.
  5. Hissing or gurgling: These sounds could indicate a refrigerant leak, which requires professional attention. Turn off the AC and contact a technician immediately.
  6. Rattling: Clean the AC unit and remove any debris. If the rattling persists, a technician should inspect the motor or the overall condition of the unit.
  7. Humming: If the AC hums excessively while trying to start, you may have a starting capacitor problem. Contact a technician to inspect it.
  8. Whistling or screaming: These sounds indicate serious issues, such as a refrigerant leak or high internal pressure. Turn off the AC and call a professional immediately.

Please note that while these troubleshooting tips can help identify the problem, it’s always recommended to consult with a professional HVAC technician for any repairs to ensure your safety and the longevity of your air conditioning unit.

Conclusion – 8 noises your AC shouldn’t make

In conclusion, understanding the different noises your air conditioner can make is essential in identifying potential issues and addressing them promptly. We highlighted eight unusual sounds–banging, buzzing, clicking, squealing, hissing, rattling, humming, and whistling–that should not be ignored. The accompanying troubleshooting guide provides preliminary steps to mitigate these issues.

However, considering the intricate nature of AC systems, professional assistance is often required, particularly in handling serious problems like refrigerant leaks or high internal pressure within the compressor. By staying alert to these auditory cues, you can ensure your AC unit maintains its performance, providing you with comfortable and cool indoor temperatures.

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