Why Is My Aircon Making Loud Vibrating Sounds?

Midea aircon

If your AC is making loud vibrating sounds, it’s often a sign that something isn’t functioning properly. While all air conditioning units make some noise during operation, especially older models, a noticeable increase in vibration or a loud buzzing sound typically points to an issue that requires attention. Below are the most common causes of this problem and what you can do about them.

1. Loose Parts

Over time, the internal parts of your AC can become loose due to regular wear and tear. Screws, bolts, or mounting brackets inside the unit might loosen, especially if the unit has not been serviced regularly. When these parts move during operation, they can cause intense vibration and noise.

2. Imbalanced or Damaged Fan Blades

The indoor blower fan or outdoor condenser fan might become unbalanced or bent. When this happens, the fan blades can wobble as they spin, creating a loud vibrating or rattling noise. Foreign objects such as twigs, leaves, or debris can also get caught in the fan, further disrupting its balance.

3. Worn or Misaligned Motor

The AC motor is a common source of vibration. If the motor is worn out, misaligned, or lacking proper lubrication, it may create excessive vibration during operation. This can be especially noticeable when the unit starts up or shuts down.

4. Compressor Issues

The compressor is the heart of your AC system and is located in the outdoor unit. If the compressor is failing or improperly mounted, it can vibrate excessively and create a loud humming or buzzing noise. Older compressors are more prone to this issue. View more

5. Poor Installation

An AC that wasn’t installed correctly can vibrate against the window frame or wall. This is especially common with window or wall-mounted units. If the unit isn’t level or if the mounting frame is unstable, it can rattle and vibrate loudly when the unit is on.

Check to see if the unit is securely installed and level. Use foam insulation or vibration-absorbing pads to reduce contact with hard surfaces.

6. Dirty or Clogged Components

Dust, dirt, or grime buildup on the internal parts of your AC can throw the system off balance. For example, a clogged air filter can restrict airflow, causing the fan motor to work harder than necessary, which may result in vibrations.

Clean or replace the air filter regularly. Also, keep the unit’s coils and fan blades clean to ensure efficient operation.

7. Refrigerant Flow Noise

In rare cases, unusual vibrating sounds can come from the refrigerant flowing through the system, especially if there’s too much or too little refrigerant. This can create gurgling or buzzing sounds that may be mistaken for vibration.

If you suspect a refrigerant issue, contact a licensed HVAC professional. Handling refrigerant without proper training is dangerous and illegal in many regions.

Final Thoughts

Loud vibrating sounds from your AC are not normal and should be addressed promptly to prevent further damage. While some issues are easy to fix, like cleaning or tightening parts, others—like motor or compressor problems—require professional intervention.

Regular maintenance is the best way to prevent vibration and other noises. Scheduling annual servicing with a certified technician ensures that your AC runs efficiently and quietly, extending its lifespan and saving you money in the long run.

Contact information:

Call: +65 90235452 (or) WhatsApp us: https://wa.me/6590235452

Mandai Estate,

Singapore -729908.

Mail ID: info@coolcare.com.sg

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