What’s That Noise Coming from My Air Conditioner?

One of the ways that air conditioners warn is about impending repair needs or approaching breakdowns is through strange noises. The frequent cause of loud, obtrusive sounds from an AC is components that are wearing down. There are other issues with an AC that can result in strange sounds, but in general you should always consider these noises as a caution that something in the system needs professional attention as soon as possible.

This is a brief breakdown on the common warning noises from ACs and what they should mean. Don’t try to diagnose the exact cause yourself, however: call for HVAC professionals who know air conditioning in Franklin, TN. At Mid-State Air Conditioning, Heating & Plumbing, we promise that we’ll fix your AC right or the job is free.

Common warning noises from air conditioners


  • Hissing: This sound like escaping air means there is a refrigerant leak somewhere in the lines or the compressor. Refrigerant loss is a serious problem, since it reduces the ability of the AC to carry the heat exchange essential for it to work. Not only will an air conditioner start to lose cooling power as it loses refrigerant, but low refrigerant charge can damage the compressor and lead to icing along the indoor coil. Have repair technicians locate and seal the leak, and then recharge the refrigerant to the proper level.
  • Grinding and screeching: These noises are usually indicative of trouble with one of the motors. Excess dust or loss of lubrication can cause stress along the moving parts of the motor, leading it to burn out and needing a replacement. Electrical problems can also lurk behind this. In a worst case scenario, this could be the compressor failing. Call for repairs right away.
  • Clanging: If it sounds like a piece of metal is striking another piece of metal inside an air conditioner’s cabinet, than it probably is. This could be loose fan belt or a bent fan blade causing the collision; whatever the cause, it needs repairs immediately before it leads to further damage.
  • Clicking: When an air conditioner has difficulty starting (“hard starting”), listen for a clicking noise. This often warns that the problem is a dying capacitor, the component responsible for transmitting electrical voltage to the motor to start them up and keep them running. Repair technicians can replace the problematic capacitor.

Any AC repair needs left without attention has the potential to grow worse, but repair problems that are producing mechanical noises usually cause additional damage faster than others. Do not hesitate or delay in calling for professionals to handle it.

Since 1970, Mid-State Air Conditioning, Heating & Plumbing has helped Franklin, TN, Nashville and the Middle Tennessee area with heating and cooling. You can trust to our NATE-certified technicians to repair you air conditioning in Franklin, TN. Give us a call today to schedule your next service appointment.

No Comments

Sorry, the comment form is closed at this time.

NATE-certified technicians in HVAC in Nashville, TN, air conditioning and heating - Mid-State.
Angie's List Super Service Award, for air conditioning in Nashville, TN and Clarksville, TN, call today, we do HVAC and plumbing services too at Mid-State!
Mid-State is a BBB accredited business for HVAC in Nashville, TN, plumbing, air conditioning and heating too!

Mid-State Air Conditioning, Heating & Plumbing

services these areas:

Franklin, TN
Hermitage, TN
Fairview, TN
Arrington, TN
Bellevue, TN
Triune, TN
Joelton, TN
Santa Fe, TN
Burns, TN
Goodlettsville, TN
Nolensville, TN

Ashland City, TN
Kingston Springs, TN
Clarksville, TN
Lyles, TN
Chapmansboro, TN
Dickson, TN
Madison, TN
White Bluff, TN
Mt. Juliet, TN
College Grove, TN
Thompson’s Station, TN

Antioch, TN
Brentwood, TN
Columbia, TN
Spring Hill, TN
Pegram, TN
White’s Creek, TN
Smyrna, TN
Kirkland, TN
Nashville, TN
Bon Aqua, TN
LaVergne, TN