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Air conditioners are essential appliances that help keep our homes comfortable during the hot summer months. They work tirelessly to cool the air inside our homes, but just like any other appliance, air conditioners can make noises that range from normal to concerning. Understanding the sounds your air conditioner makes can help you identify potential issues and prevent costly repairs.

1. Humming Noise

A humming noise is a common sound that air conditioners make when they are running. It is usually a low-pitched sound that comes from the compressor. The air conditioner’s compressor is responsible for pumping refrigerant through the system, and a humming noise signifies that it is working correctly. However, if the humming noise is louder than usual or accompanied by a clicking sound, it could signify a faulty compressor. In this case, it’s best to call a professional to diagnose and repair the problem.

2. Rattling Noise

A rattling noise is a common sound that air conditioners make when they are starting up or shutting down. It is usually caused by loose parts in the unit, such as screws or panels. If the rattling noise is constant, it could signify a more serious problem. Loose parts can damage other components in the unit, so it is important to have the problem fixed as soon as possible. Rattling can also be a sign that the unit is not installed correctly, and the problem may not be with the air conditioner itself but rather with the installation.

3. Buzzing Noise

A buzzing noise is a common sound that air conditioners make when they are running. It is usually caused by loose parts in the unit, such as the fan blades or the motor. If the buzzing noise is constant or gets louder over time, it could signify a faulty motor or fan. In this case, it’s best to call a professional to diagnose and repair the problem. Buzzing can also be a sign that the air filter needs to be changed. A filthy air filter can cause the unit to work harder, leading to increased wear and tear on the motor and fan.

4. Hissing Noise

A hissing noise is a common sound that air conditioners make when they are running. It’s usually caused by a refrigerant leak in the system. Refrigerant is a vital component of the air conditioning system, and a leak can cause the unit to malfunction. If you hear a hissing noise, turn off your air conditioner instantly and call a professional to diagnose and repair the problem. Refrigerant leaks can be dangerous, as refrigerant is a toxic substance that can cause health problems if inhaled.

5. Grinding Noise

A grinding noise is a concerning sound that air conditioners can make. It is usually caused by a faulty motor or fan. If you hear a grinding noise, turn off your air conditioner immediately and call a professional to diagnose and repair the problem. Continuing to run the unit can cause further damage and lead to costly repairs. Grinding can also be a sign that the motor or fan is not properly lubricated. Regular maintenance, such as oiling the motor and fan, can prevent grinding and extend the life of your air conditioner.

Final Thoughts

Understanding the sounds your air conditioner makes can help you identify potential issues and prevent costly repairs. Humming, rattling, buzzing, hissing, and grinding noises are common sounds that air conditioners can make. While some of these noises are normal, others can signify a more serious problem. Regular maintenance, including changing air filters and lubricating motors and fans, can prevent many of these problems. If you hear any unusual sounds coming from your air conditioner, it’s best to call a professional to diagnose and repair the problem. Don’t wait until it’s too late and you’re stuck with a broken air conditioner on a hot summer day.

Fix your broken air conditioner with the help of Fortis Heating & Air Conditioning. We are a locally owned and operated HVAC company that provides air conditioning repair in Oshawa. Whether you need an inspection, a repair, an installation or someone to provide sound HVAC recommendations, we’re here to help! Get a free quote now!

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