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How to Completely Change Your Thoughts About HVAC

Welcome to my blog. My name is Betty, and I recently invested in a new heating and cooling system. It had been years since I had purchased our old system, and my husband was alive then. This was the first time selecting my own system. I did a lot of research and even considered taking our HVAC system off the grid. Now, that my house is the perfect temperature all the time, I'm ready to try something else -- so I decided to start a blog. Here, I am going to post a range of blogs on HVAC related issues as well as home repairs and other topics. I hope that you like it.

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How to Completely Change Your Thoughts About HVAC

Air conditioner sound tracks: Getting to the root cause of a noisy AC unit

by Eva Fisher

Unless your air conditioning unit is from the early 1980s and prior, it should not be making loud noises during operation. In fact, most new AC units are designed to operate in an almost silent manner. These units use insulation mechanisms to dampen sound, as well as compressors that can vary their operational speed when generating cool air.

If you do notice loud noises whenever your unit is running, it is most likely caused by a particular problem with the AC. Various issues manifest themselves with distinct sounds. Here are some of the common sounds that are produced by a faulty AC unit.

1. Banging sounds (loose internal parts)

You may notice that the AC produces loud banging sounds whenever it's operating. The banging may occur in a regular pattern, almost as if someone is constantly swinging a baseball bat against the unit.

Banging sounds are often caused by a loose internal component that is constantly moving around inside the unit. For example, a connecting rod or crankshaft may fall loose and interfere with the operation of other moving parts. If ignored, frequent banging can lead to more widespread issues (such as damage to the compressor).

2. Constant clanking (unstable or worn out fan blades)

Clanking is often caused by the fan blades becoming worn out or falling out of position. You can differentiate banging from clanking by carefully listening to your AC unit. With clanking, the noise produced will be similar to an item constantly brushing against another, producing sound due to friction between the two items.

On the other hand, banging is a sharper sound resembling a collision. Unstable fan blades may fall out of position and constantly brush against other internal components, producing a clanking sound.

3. Buzzing (dirty condenser coil)

Buzzing noises produced by your air conditioner are often associated with dirt and debris accumulating on the condenser coil. The condenser plays an important role in generating cool air for the home, and debris can cause incoming air to brush against the dirt particles and produce a buzzing sound.

Have the condenser cleaned as soon as possible to prevent the unit from being unable to generate cool air.

4. Humming (electrical complications)

Humming sounds are characteristic of loose electrical connections. As electricity flows through the unit, its path can become hindered by loose wiring, poor insulation, or broken parts. As a result, humming sounds will be generated, pointing to interruptions in the flow of current.

5. Bubbling (leaking refrigerant)

Bubbling sounds are typically caused by fluids. If you here a bubbling sound in your AC, it is likely due to leaking refrigerant fluid or a leak in the condensate drain. 

For more information, contact a local expert in commercial air conditioning.

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