There are many summer sounds that are music to our ears, like crickets chirping and birds singing. But if you hear sounds coming from your outdoor air conditioning unit, you’d better pay close attention.
Take a look at these noises that might indicate an issue with your outdoor AC unit:
AC Unit Is Making a Banging Noise
If you hear a slamming or banging noise coming from your air conditioning unit, it could be a sign of a mechanical issue that needs immediate attention. One of the most common causes of this type of noise is a loose fan blade.
Another possible cause for the banging noise is a problem in the compressor. Loose or worn components inside the compressor can knock against each other, resulting in a loud clanging or banging sound.
In either case, it’s essential to act fast. Continuing to run the unit with these issues could lead to more significant damage, potentially requiring costly repairs or even a full system replacement. To prevent further harm, shut off your air conditioner immediately and contact a professional HVAC technician.
Outdoor AC Unit Is Buzzing
If you notice your outdoor unit making a buzzing sound when it’s running, this could be a warning sign of an underlying electrical issue. A buzzing noise could indicate several potential issues, such as faulty wiring, a malfunctioning capacitor, or issues with the electrical connections inside the unit.
Regardless of the source, it’s critical not to ignore a buzzing noise. Turn off the system immediately and have an AC professional inspect it. Electrical problems can pose a significant safety risk and may lead to more extensive and expensive repairs if not addressed promptly.
AC Unit Is Squealing
If you hear high-pitched squealing sounds from the compressor, it may signify high internal pressure inside the unit. When the compressor struggles to handle the pressure, it can produce a shrill, squealing noise, alerting you to the potential for a significant malfunction. In that case, you should shut off the unit and call a professional.
A similar sound can also be caused by dry fan motor bearings or a loose fan belt. An AC tune-up can prevent this type of issue.
AC Unit Is Making a Hissing Noise
If your outdoor air conditioning unit is producing a hissing sound, it’s likely due to a refrigerant leak in the system. When refrigerant leaks, it can produce a distinct hissing sound as it escapes through small cracks or holes in the coils, valves, or refrigerant lines.
The type of refrigerant leaking from your system depends on the age of your unit. Older units often use Freon (R-22), a type of refrigerant that’s now being phased out due to its harmful environmental effects, particularly its contribution to ozone depletion. Newer systems typically use Puron (R-410A), a more environmentally friendly refrigerant. Regardless of the type, refrigerant leaks are a serious issue that should be addressed promptly.
If you suspect a refrigerant leak due to hissing sounds, you should turn off your AC immediately and contact a professional for an inspection. They can pinpoint the location of the leak, repair or replace damaged components, and recharge the system with the correct amount of refrigerant.
AC Unit Is Screeching
If your air conditioning unit begins to make a loud, screeching sound, it may mean metal components inside the system are rubbing against each other. This type of noise often points to failing bearings within the fan motor.
Continuing to run the AC after hearing this sound can further damage the compressor, so you should turn it off and call a professional.
Larry & Sons Can Diagnose & Repair Strange Air Conditioner Noises
If strange sounds are coming from your AC system, Larry & Sons Plumbing, Heating, Cooling & Electrical can help with professional repairs. Our family-owned plumbing, heating, cooling, drain, and electrical company has been a part of the business community of the tri-state area for nearly 60 years.
Tell us what sound your AC is making, and we have the experience to know the exact issue and the skills to fix it right the first time.
Call or contact us online today for all your air conditioning system repair and replacement needs.