Does Your AC Make Weird Noises? Here’s What Those Noises Might Mean

Woman checking her room air conditioner

Woman checking her room air conditioner

Air conditioning units today are quieter than ever. With advanced technology, most modern AC units have sound-dampening features, as well as high-quality compressors than can keep noise levels below 55 decibels. So, if your AC unit makes banging, humming, or other weird noises, you might need to do something about it.

Clanking and Banging Noises

Clanking and banging noises are usually a sign that there’s a broken or loose part inside the air conditioning compressor. It could be a loose crankshaft or piston pin or worse, the entire compressor has become loose. If that’s the case, you’ll need to replace the parts or the compressor itself. Clanking and banging noises, however, could also mean that your unit has an unbalanced indoor blower or outdoor fan. When the blades of the blower or fan are out of balance, they hit other unit parts, causing banging or clanking noises.

Buzzing Noises

A buzzing noise from an AC unit may mean a lot of things. It could be loose parts, unbalanced fan blades, a failing fan motor, copper lines rubbing against something, or worse, refrigerant leaks. But sometimes, it only means you need to clean or change your air filter or condenser coil. It is important to find out the real cause of the buzzing noise, so you can address the problem immediately and prevent further damages.

Whistling Sound

If you hear high-pitched whistling sound from your unit as if it is screaming, shut the unit off and call for an AC repair in St. Louis, MO right away. Most likely, the cause of the whistling sound is a dangerous refrigerant leak. This doesn’t only cause serious damages on your AC unit, but this can harm your family’s health, as well.

As a rule of thumb, turn off your air conditioning unit if it makes unsettling noises. Plus, don’t hesitate to call us, anytime, should you need a professional to inspect your loud AC unit for possible serious issues.

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