A noisy air conditioner compressor may cause inconvenience in your home, especially if the issue does not resolve for a long time. What can be the reasons behind aircon compressor noise, and is it a warning sign for more serious issues? Get to know the common causes of a noisy compressor and when you should consider repairing or replacing it.
Types of Compressor Noises and What They Mean
The compressor is considered as the heart of every aircon system because of its critical role in circulating refrigerant, allowing your aircon to cool your room. However, you may face issues such as a noisy compressor over time. Here are some common types of aircon compressor noises and what they might signify.
- Humming and buzzing: May be caused by loose parts, debris, and faulty fan motors
- Rattling and banging: May be caused by a malfunctioning compressor motor or an unbalanced indoor blower
- Clicking noises: May be caused by electrical problems
- Hissing noises: May be a sign of blockages or pressure in the aircon system
- Grinding, squeaking, and squealing: May be caused by a malfunctioning compressor fan motor
Common Causes of Compressor Noise
While a professional inspection is needed to identify the root cause of a noisy air conditioner compressor, some of the most common causes include:
Wear and Tear
In older aircon units, the compressor may be in suboptimal condition due to wear and tear and produce noises. The compressor’s electrical components may also produce noise due to overheating.
Motor Malfunction
A malfunctioning compressor fan motor is a common source of noise in your aircon compressor. As the motor is vital to the compressor, any malfunction or failure can cause it to generate unwanted noises.
Refrigerant Issues
Refrigerant issues, such as incorrect levels or leaks, may cause the compressor to make noises. A hissing or low humming noise is particularly alarming as it may indicate a leak. As refrigerant leaks are dangerous, you should schedule an inspection to address the issue immediately.
External Problems
The accumulation of debris or positioning the compressor too close to walls or other objects may also cause aircon compressor noise. Dirt and small stones may get stuck in the compressor and obstruct its operation, creating a rattling noise. As these obstructions can hinder optimal airflow, the compressor needs to work harder, resulting in louder sounds and potentially overheating.
Warning Signs Your Compressor is Failing
Most of the time, a malfunctioning compressor has other warning signs along with unwanted noise. Here are the signs you should not ignore:
Aircon Not Cooling Properly
If your aircon is not cold and only blows out warm air, it may signal that your compressor is not circulating the refrigerant correctly.
Weak or Reduced Airflow
A failing compressor can cause the airflow from your unit to weaken. However, this is a common signal in both compressor issues and airflow problems, and a professional inspection is recommended to determine the exact cause.
Breaker Trips
When your compressor is failing, it draws too much power and can cause frequent breaker trips. This often indicates overheating or electrical damage.
Refrigerant Leaks
Wet spots, oily stains, or hissing sounds around your outdoor unit may be a sign that your refrigerant is leaking. Since the compressor needs adequate refrigerant levels to work, professional diagnostics are essential before it overheats or fails entirely.
Outdoor Unit Not Turning On
In some cases, the indoor blower may continue running, but the outdoor unit does not engage. This may indicate that the compressor has failed or its capacitor may be defective.
Solutions for Noisy Aircon Compressors
Here are the steps you can take to resolve aircon compressor noise:
Regular Cleaning
Keeping your indoor and outdoor aircon unit clean is essential to prevent unwanted compressor noise. Inspect the outdoor unit regularly to make sure it is free from obstructions. If necessary, reposition it to avoid debris. You can also install a mesh guard over the vents to filter out debris, and clean your aircon filter regularly.
Check for Wear and Tear
While in between your aircon maintenance schedules, you can perform independent checking for wear and tear to prevent minor issues from turning into major problems. For instance, check and tighten any loose parts, such as screws and bolts. Bent or damaged fan blades should also be replaced to prevent rattling noises.
Schedule Regular Maintenance and Cleaning
Scheduling regular maintenance by a professional technician can help ensure that your aircon compressor and other components are in prime condition. This can help prevent more expensive servicing from more serious damages in the future. A professional technician is also equipped with the necessary training and tools to do an inspection and aircon compressor cleaning, keeping your compressor working optimally.
When to Repair vs Replace Your Compressor
Frequent aircon compressor noises and other issues may cause you to wonder about whether it is time to get a new compressor. In certain cases, repairing it may be a more cost-effective choice, especially if the unit normally performs reliably and still meets your current air cooling needs. For instance, if the noise is due to a damaged component who can be easily replaced, you may not need to get a new compressor entirely.
However, if you have an older unit with frequent breakdowns, consumes excessive energy, and the compressor’s replacement parts are difficult to find due to coming from an outdated model, it may be more reasonable to replace it. In this case, getting a new compressor may help reduce energy consumption and costs due to repeated repairs. For a more sound decision, it is best to consult with a professional technician who can inspect and identify the main cause of your noisy air conditioner compressor.
Maintain Your Aircon Compressor with Our Professional Service
Aircon compressor noises can cause significant disturbance in your home. If you are unsure about the cause or source of the noise, our professional team at Cool-Aire is here to assist you. Aside from addressing unwanted noise, we help keep your compressor working efficiently, extending the lifespan of your aircon unit. Get in touch today to enquire about our services!