A window air conditioner is a great way of keeping a room cool in the absence of central air conditioning. These window ACs come as a comprehensive unit that can be mounted on a window or even a specially designed aperture in a room. You do not need to install additional piping or separate condenser units.
Installing them is also far simpler than designing and installing central air conditioner units. However, the biggest problem with window air conditioners is that they can sometimes be noisy. Here are some steps that you can follow to troubleshoot a window air conditioner that is excessively noisy or loud.
1. Foreign Objects
If your window air conditioner has been operating at a steady noise level but suddenly starts making a loud noise, it’s possible a foreign object has fallen into it. This is quite common in these types of air conditioners because the outer part of the unit hangs outside your window, making it easy for small animals or flying debris to enter your air conditioner.
If your room is on the ground floor, it’s possible that a ground dwelling animal like a rat or lizard may have made your window unit its new home.
Switch off your air conditioner immediately, unplug it, and open the front grill. Using a flashlight, peek inside the unit. Remove the foreign obstruction, fasten the front grill back in place, and start the air conditioner once more.
2. Bent Fan Blades
In certain cases, the presence of an intruding object does damage that causes problems even after it’s been removed. The fan blades inside your window air conditioner, for example, can become bent if they strike an object that falls inside the unit.
Check to see if the blades are straight. If not, straighten them until they are properly aligned. This can be done by hand or by using a strong pair of pliers if necessary.
If you are not able to figure out whether the blades are bent or not, consider seeking professional assistance.
3. Vibrations on Window Frame
Window air conditioner units are heavy, have lots of moving parts, and are precariously mounted in window frames. As a result, these units are prone to a lot of vibration if they have not been mounted correctly. Touch the sides of the window frame on which the air conditioner is mounted. If they are vibrating excessively, you should call the people who installed the air conditioner and ask them to fix it so that the vibration is minimized.
4. Loose Front Grill
The front grill of a window air conditioner needs to be removed on a regular basis to clean the filter. These grills are usually held in place by a simple locking mechanism. While a dirty filter is certainly problematic for the unit’s function, it won’t cause excessive noise.
However, if the grill is not put back properly following a cleaning or the locking mechanism is defective or damaged, it can vibrate around and cause a lot of noise. Remove the grill and set it back on properly to eliminate this noise.
If the locking mechanism has been damaged, you may have to replace it.
5. Insufficient Lubrication
If the fan motor is not properly lubricated, it can result in a loud persistent noise. If this is the case, switch off the air conditioner to avoid damaging the motor.
In the middle of heat wave, this cause is the worst one to discover at the root of your noise problem. Since most fan motors are sealed, you may have to call for professional assistance to lubricate the fan motor.