Remedies For A Noisy Air Conditioner

In Heating & Cooling 101 by Allan WLeave a Comment

Steps to Remedy a Noisy Air Conditioner


There are few things more annoying than listening to a noisy air conditioner all season long. Depending on your unit (and the noise), the noise can be generated by a myriad of components or factors. No matter what is causing it, an unnatural noise in your air conditioner is not something to ignore. The faster you can address the problem, the greater chance you have of it not snowballing into a larger – more expensive problem.


Dirty, Un-Cared for Air Conditioner

The more dirt, debris and elemental exposure you’re A/C has endured without being looked after, the greater the chance of it wearing out prematurely, not working as efficiently or not working at all. If you haven’t in the past, regularly clean and look after your air conditioning unit. There are cleaners that are designed for this purpose, or you can have a service come out and do it for you.


Motor Emitting Noise

Depending on your model, your air conditioning unit’s motor may require lubrication after a certain period of time. Grinding or loud humming noises are often times an indication of a motor issue. In an attempt to remedy this, apply SAE 10 oil in any applicable areas. Oiling the air conditioner at the beginning of the season can often help stay in front of this issue.


A Noisy Fan

It is important that a fan be kept clean and properly maintained. Rattling, grinding or vibratin noises can lead you to your air conditioner’s fan. These noises often indicate a need for cleaning or removal of debris.

  • Open the air conditioner cabinet and remove any debris around the blades. In some cases items may fall into the unit and cause noises when they get in the way of the movement of the blades.
  • If the problem is not debris, then check to see if the blade itself is loose. If so, then you can tighten the screw at the hub.
  • Check to make sure that the blades are straight. A blade with even a slight bend may be touching the inside of the unit which will produce a noise. The blades may be bent back into place, but you will have to be gentle and precise in handling them.

Loose Screws

Air conditioners create a good deal of vibration and this vibration can cause screws in the unit to work loose. Many of the problems that make air conditioning units noisy are the result of screws in panels throughout the unit that have been vibrated loose. The mounting screws that are holding the unit in place can also be loosened as the unit operates. Both situations will produce a rattling noise when the air conditioner is putting out air. These can all be easily fixed with a few turns of your screwdriver.

If these problems persist, you are unable to locate the sound or you are uncomfortable working with your system, an area HVAC professional will surely help. If the problem cannot be fixed or is too expensive to reasonably fix, Younit’ is always happy to help you in your new air conditioner purchase. We pride ourselves on great prices, unparalleled service and the best brands around.

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