Technician checking AC blower

Why Is My Aircon Making Noise? How to Fix it?

Air conditioners have improved significantly over the years. Today, most models are virtually silent when running. If your unit is noisy, it might indicate a problem. If your aircon is making noise, keep reading to find out what causes the sounds and how to deal with the problem.

Vibrations and Humming

If you hear a humming noise like something is vibrating, there might be a loose pipe inside your air conditioner. This isn’t a serious problem, but it’s still an issue to address.

If the humming noise sounds more like buzzing, the motor in the unit might have an issue. This is likely if the compressor isn’t starting. Ensure regular maintenance to handle these problems before they stop your unit from working.

Clicking Noises

Hearing clicking noises when you turn your AC on or off is normal. However, if these noises persist, there may be an issue. The problem could be with your thermostat or an electrical issue.

There are many electrical components in an AC unit, and if even one fails, it can cause problems. Don’t panic if you hear a clicking noise, but if it doesn’t go away, have your unit inspected.

Clanking Sounds

If you’re hearing loud clanking or banging noises, it’s likely that a part inside your unit is loose. What you’re hearing is the part jostling around while the AC operates. If your unit has an outdoor fan, it’s possible that the blades are out of balance.

If you have a loose part, the problem won’t go away until the part is tightened. The same is true for any issues with your fan. It’s best to have your unit inspected so professionals can correct these problems.

Squeaking or Squealing

Shorter squeaks or sustained squeals indicate a problem with the aircon motor. Motors make these noises when they’re about to fail.

If you hear these noises, your motor may need replacement, which can be costly. It might be more cost-effective to install a new aircon. Learn about repair costs and decide how to proceed.

Banging Noises

It’s hard to ignore your AC when it’s making banging noises. These noises can make it difficult to leave your aircon running when you’re trying to fall asleep. This is generally an indicator of a loose part.

These noises can also be a problem when there’s an issue with the compressor. No matter the source of the problem, you’ll want to have it looked at sooner rather than later. Repairs will be cheaper if you spot these issues right away.

Buzzing Sounds

Buzzing noises can be harder to notice than banging noises. You might only hear them when standing next to your air conditioner. Many things can cause buzzing noises, making this a common problem.

Buzzing noises can occur when a part is slightly loose, potentially turning into louder banging or rattling noises if not addressed. Debris in the unit can also cause these problems, which is often solved by cleaning your AC. It could also indicate that your air filter needs changing.

If you hear these noises, check your filter and clean your unit. If the problem persists, contact professionals to inspect your unit and find the real source of the problem.

Rattling or Chattering

Hearing rattling or chattering indicates multiple parts inside your AC are loose or worn down. These sounds are common when a unit is nearing the end of its lifespan. If your air conditioner is over 10 years old and making these sounds, consider looking at new models.

For newer units, these noises likely stem from a minor problem. Check all the screws on your unit. If any are loose, tighten them. If this stops the noises, you’re in the clear!

Whistling Noises

If your aircon makes a high-pitched noise like a whistle or scream, shut it off immediately. This noise indicates a refrigerant leak.

This problem needs professional attention. Ensure your AC unit is off until help arrives. Otherwise, harmful substances could enter your home, risking your household.

Since you depend on your aircon for comfort, address any noises you hear. Whether it’s banging, buzzing, or another noise, solve the problem and get professional help if needed. Check out other common AC problems here.

Is Running a Noisy AC Risky?

The air conditioner typically produces a low humming sound from the fans and compressor. A distinctively audible hum may signal an underlying issue that should be checked immediately. This can be refrigerant piping, loose parts, or a broken fan blade. Failure to check these could prove costly in the long run. A faulty electrical system or supply may also cause the AC to produce strange buzzing sounds.

How To Fix a Noisy Air Conditioner Problem?

Fans become noisier when covered with dust and dirt. Lack of proper lubrication may also cause a noisy fan. Regular cleaning and maintenance can help fix or prevent these issues.

Here is a guide on cleaning your air conditioner’s fans.

  • Using a screwdriver, open the air conditioner cabinet to access the fan. Inspect all fan blades to ensure they are intact and undamaged. Remove any debris on or around the fan blades, such as insulation materials, dust, and leaves.
  • Check if the blades are firmly attached to the base. A loose fan will vibrate uncontrollably, transferring energy to other parts of the unit, causing the rattling noise. Use an Allen wrench or screwdriver to tighten the screws holding the fan.
  • Ensure the fan blades are straight and not bent. Even a slight bend will cause the unit to vibrate. The blades should not touch the inside of the unit, as they will either break or produce squeaking noises. Fan blades can be delicate, so handle them gently.

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