Old air conditioning units are generally pretty noisy. However, today's units are much more efficient and quieter. They are equipped with technology that ensures that they do not make loud noises. Therefore, if you notice unusual noises coming from your air conditioning unit, it is imperative that you do not ignore them, as they are a sign that there is a problem. Keep reading to learn some of the most common noises that your AC may make and why your unit is making them.

Shrieking

A shrieking noise coming from your air conditioning unit can send you running, but make sure you make a phone call to your HVAC technician first. This noise can be a sign of a grave problem with the system. This sound will be coming through the ducting, and you will likely be able to hear it regardless of where you are in the home. There is a good chance that the noise is a result of an improperly functioning blower or fan motor, and requires repair. If the problem is not addressed soon, further problems will occur.

Grinding

A grinding sound coming from the air conditioning unit is indicative of a compressor issue. This can occur over time as the compressor wears out. The compressor is responsible for the circulation of refrigerant. The grinding noise is likely due to the pistons within the compressor having worn out or becoming damaged. Since the compressor is an integral component of the air conditioning unit, it will need to be assessed and replaced immediately by a professional.

Rattling

A chattering or rattling sound from within the air conditioning unit is a sign that the unit as a whole is beginning to deteriorate. The internal components of the unit may be loosening, and if there is any debris inside, it may be causing clogs and resulting in the rattling noise that you hear. The noise may also be a result of a damaged compressor or other defective components. In some cases, the fan may have become loose, resulting in the rattling noise.

Clanging

A loud clanging noise is indicative of something inside of the unit that is out of balance or loose. The internal components may have failed in some way or the AC compressor may have come loose. The clanging sound may also be a sign of issues with the exterior fan or the blower motor. If the loose fan is not repaired soon and ends up hitting other components, it could result in more extensive damage on the inside of your unit.

While your air conditioning unit may be cooling your home efficiently while making these unusual noises, it is still important to contact a repair service to address the issues to avoid more serious damage to the system as a whole. For more information about AC repair, contact a local HVAC technician.