Tips

Is Your Air Conditioner’s Outdoor Unit Noisy? Here’s Why and What to Do About It.

The outdoor unit of an air conditioner can be a source of significant noise pollution, causing disturbances not only to the homeowner but also to their neighbors.

Administrator

10 July, 2024

During the summer or on extremely hot days, air conditioners are a popular choice for cooling down among families. The cooling process of an air conditioner is carried out by two main components: the indoor unit (evaporator) and the outdoor unit (condenser). The indoor unit is installed inside the house or room, while the outdoor unit is placed outside.

Since the outdoor unit is typically out of sight, issues with it often go unnoticed by users. It is only when the performance of the air conditioner is affected that people start to pay attention to the outdoor unit and discover problems during inspections.

Illustration

One of the signs that something may be wrong is when the outdoor unit of the air conditioner emits loud noises. Many users tend to overlook this, assuming it is a normal part of the air conditioner’s operation. However, in reality, according to experts and experienced technicians in the field of refrigeration, when the outdoor unit produces abnormally loud noises, it is advisable to inspect and fix the issue immediately. This not only ensures the longevity and efficient operation of the appliance but also prevents any inconvenience to your family and neighboring households.

Reasons Why the Outdoor Unit of an Air Conditioner Produces Loud Noises

Specifically, experts have identified four common reasons why the outdoor unit of an air conditioner may emit loud noises during operation.

1. Damage or Loss of Rubber Pads Under the Outdoor Unit

The outdoor unit of an air conditioner is usually placed on rubber pads, which serve the purpose of stabilizing the unit and reducing noise. These rubber pads help to dampen the vibrations and make the operation of the outdoor unit quieter. When the unit suddenly produces loud noises or even strong vibrations, it is highly likely that these rubber pads have been damaged, worn out, shifted from their original position, or completely lost. Experts consider this to be the most common scenario.

Illustration

Since the outdoor unit is exposed to the elements, including rain, storms, and strong winds, it is inevitable that the rubber pads will be affected over time. The solution in this case is simple: users just need to purchase new rubber pads and place them correctly under the unit.

2. Lack of Regular Cleaning and Maintenance of the Outdoor Unit

Again, due to its outdoor location, the condenser unit is susceptible to accumulating dust and dirt over time. Leaves and other debris can also get stuck in the unit, especially in the fan area, causing operational issues. As a result, the unit may produce annoying noises or even get jammed.

Experts recommend regular cleaning and maintenance of the outdoor unit to prevent this issue. Depending on the usage frequency, it is advisable to clean and service the unit every 6-12 months.

Illustration

3. Presence of Foreign Objects in the Outdoor Unit

The third reason is similar to the second one. Due to a lack of regular cleaning and inspection, foreign objects such as large pieces of debris, branches, or even animals and insects may find their way into the outdoor unit, obstructing the fan and causing loud noises.

4. Issues with the Outdoor Unit’s Fan

The fan is arguably the most crucial component of the outdoor unit, as it ensures the smooth expulsion of hot air. Problems with the fan can include misalignment from the center of gravity, loose fittings, lack of lubrication, or cracks and fractures. When the outdoor unit operates with a malfunctioning fan, the vibrations and noises are amplified. Moreover, experts warn that if left unattended for an extended period, the loose fan could lead to electrical shorts and fires due to the potential for the fan to fall out and get stuck within the unit.

Illustration

Regardless of the cause, it is advisable to stop using the air conditioner and seek professional assistance when you notice that the outdoor unit is making louder-than-usual noises. Do not attempt to inspect or repair the outdoor unit on your own unless you have the necessary knowledge and experience.

Frequently asked questions

There can be several reasons for a noisy outdoor unit, also known as the condenser unit. Some common causes include a dirty or blocked condenser coil, a faulty fan motor or blades, loose parts or debris caught in the unit, and refrigerant leaks.

To reduce the noise from your air conditioner’s outdoor unit, you can try the following: clean or replace the condenser coil, check and tighten any loose parts, remove any debris or objects blocking the unit, ensure the fan motor and blades are functioning properly, and address any refrigerant leaks by calling a professional technician.

It is recommended to regularly clean and maintain your air conditioner’s outdoor unit at least once a year, preferably before the start of the cooling season. This includes tasks such as cleaning the condenser coil, checking for any blockages or debris, and ensuring all parts are secure and functioning properly.

A noisy outdoor unit can indicate underlying issues that, if left unaddressed, can lead to decreased efficiency, higher energy bills, and potential breakdowns. It can also cause disturbances to you and your neighbors, especially if the noise levels are excessive.

It is generally recommended to cover the outdoor unit during winter to protect it from the elements, particularly if you live in an area with harsh winter conditions. However, ensure that the cover is breathable and secure, and remember to remove it before using the air conditioner again in the spring.