Are air conditioning units noisy?

It’s often believed that air conditioning units are noisy and intrusive. Occasionally, newspapers report on stories of neighbour disputes about very noisy units that run at all times of night and day. This has created the impression that air conditioning units may be too noisy for most homes.


Is there any truth in it?


The idea that air conditioning units are prohibitively noisy and can cause a nuisance reflects an experience of older units. In the past, old air conditioning units could be noisy, and if they were poorly installed and maintained, or installed somewhere inappropriate, then they could become a nuisance.


Over the years the operation of air conditioning units has become considerably more efficient and user friendly, ironing out some of the issues that prevented many people from considering them as an option for their home. One of these factors is noise, and today a properly installed and maintained modern domestic air conditioning unit operates efficiently with the minimum of noise intrusion.


What if my air conditioning unit is making a noise?


Aside from general operational noise, there are other noises that a unit might make which you should pay attention to.


If your unit is making a banging noise, either regularly or intermittently, it suggests that there may be an issue with one of the parts. A connecting rod, piston pin or crankshaft inside the compressor may be loose or broken. Alternatively, the indoor blower may be unbalanced. It could also indicate that the compressor needs to be replaced.


If the unit is making a clanking sound this could also indicate that a part is out of balance, or that parts inside the sealed unit have failed. The compressor itself might have become loose and may need replacing. The sound might also mean that the outdoor fan or indoor blower and its blades are hitting other parts of the system. These kinds of problems need to be addressed and will only cause more issues if they’re left.


Clicking is not uncommon at startup and shutdown, but if it becomes constant then it could be a sign of a defective control or an issue with the thermostat. It might suggest an electrical issue that needs to be addressed as quickly as possible before it becomes a bigger problem.


Loud buzzing noises can have a number of causes. It might suggest that there is debris in either the indoor or outdoor unit, with the outdoor fan motor coming loose or perhaps about to fail. Fan blades may be out of balance, or the copper lines from outside are rubbing against something. Alternatively, there could be a refrigerant leak or the condenser coil needs to be cleaned.


Minimise noise and other problems with regular servicing


The easiest way to ensure the efficient operation of your air conditioning system and to avoid problems is by having your system is regularly serviced and maintained.


At Enviro Chill, we provide affordable, comprehensive and flexible maintenance, servicing and breakdown services.


Call 0151 2851818 or use our online contact form to find out more.