Why Is Your Air Conditioner Making Noises? Here Are Some Common Reasons in Davie, Florida

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Summers in Davie can be real scorchers, so it’s safe to say that your air conditioner will get a lot of use. One day, you turn on the system and hear a startling banging, grinding, or screeching noise that wasn’t there before. What’s making that racket, and does it spell trouble for your cooling system?

New air conditioner noises are certainly a reason to pay attention. Learn some of the most common reasons for an air conditioner making noise below to see if you need to do anything about them. 

Top Reasons You Might Hear Your Air Conditioner Making Noises in Davie, FL

Some air conditioner noises are normal. If you haven’t used your system for a while, it might make some knocking noises as it ramps things up the first time you switch it back on. These sounds should stop once the unit has been running for a while.

You may also hear the system gurgling or groaning from time to time as the refrigerant changes from a liquid to a gas state. However, from that point onward, you shouldn’t hear much except for a quiet hum.

If your unit is constantly making noise, something is amiss. These common reasons for an air conditioner making noise signal that it needs professional attention:

Loose or Unbalanced Fan Blades

Do you hear a constant, rhythmic clanking or rattling noise coming from your air conditioner? 

Typically, such noises mean loosened or unbalanced fan blades. The sound you hear is from the fan blades bouncing off other parts inside the unit, so you can imagine that component damage is likely. 

An HVAC technician will see if any of the fan’s screws have come loose or fallen out and replace or tighten them. Then, they’ll check that the system runs smoothly again.

Worn-Out Motor Bearings

Do you hear grinding, squealing, or screeching noises?

Your air conditioner contains a blower motor that’s responsible for pushing cooled air throughout your home. This motor features bearings that are designed to reduce friction and cut down on wear and tear. If the bearings are bad, you might hear grinding, squealing, or screeching sounds similar to a car peeling out on the pavement. 

An HVAC specialist will inspect and replace the bearings.

Refrigerant Leaks

Is the air conditioner making noises that resemble screaming or whistling? 

When you had your air conditioner installed, the technician added refrigerant, which your system relies on to cool your home. Because your air conditioner is a closed system, these refrigerant levels shouldn’t fluctuate much unless there are cracks in the coolant lines. With low refrigerant, you may notice weird noises and the unit taking longer to cool your home.

A technician will need to repair any leaks and top off the refrigerant.

Debris in the Outdoor Unit

Do you hear something rattling in your outdoor unit? 

Debris is a likely culprit, including sticks, rocks, chunks of soil, or even an animal nest. You may be able to dislodge the debris by spraying the unit with a garden hose. If that doesn’t work, you’ll have to open the unit and remove the debris manually. 

Our HVAC experts in Davie, Florida, can do this for you as part of the unit’s annual maintenance.

Faulty Compressor

Are there other unusual air conditioner noises becoming noticeable?

Your air conditioner’s compressor transfers heat from the refrigerant to the unit’s condenser. A faulty compressor can make different noises, including:

• Screaming: A high-pitched scream indicates high compressor pressure.
• Rattling: A loud rattling noise indicates that the compressor is bouncing around.
• Buzzing: A buzzing noise indicates a failing contactor relay switch.

All of these noises mean serious air conditioning problems. Don’t wait to call for professional HVAC services!

Dirty or Clogged Filters

Hearing quieter whooshing and rattling sounds? When was the last time you changed your air filter?

Decreased cooling performance and bad smells around your air conditioner often point to a clogged filter. The right size is also important when buying a new filter. One that’s too big or small can rattle around inside the unit and ruin your air conditioner’s efficiency.