Why is My Air Conditioner So Loud?

Machines are noisy. Even the fine-tuned engine in your car or truck is loud. It’s no surprise then that your air conditioner is also pretty loud. There’s a reason the units are outside, and it’s not just because of their size.

Generally, the older the unit, the louder it becomes (just like a car). But if your air conditioner has suddenly gotten louder than usual, or it’s making a loud, unusual sound, it might be time for some AC repair.

Why is My AC so Loud?

If your AC is an older unit, it’s naturally going to be louder than a newer one. HVAC technology has advanced to make air conditioners both more efficient and quieter.

There are several components of an air conditioner that contribute to its noisy demeanor. The compressor and fan are the two most at fault. The compressor kicks on when the thermostat tells it to, meaning the unit will get louder when the compressor starts.

But if you’ve ruled out the normal mechanical noise and are hearing something else, it may be time to call for AC repair services. If you hear any of the following sounds, there might be something wrong:

  • Rattling
  • Squeaking
  • Scraping
  • Banging
  • Clanging or clicking
  • Buzzing like an electrical buzz but louder

When the fan or blower starts to go bad, it can make a squeaking, squealing, or scraping sound that is like fingernails down a chalkboard. It may start intermittently at first as the components start to fail. Then, it may become constant before the motor finally gives out, leaving you sweltering in the Houston summer heat.

Banging or clanking can mean there is a part that has become loose or broken like a crankshaft, piston, or rod (no we aren’t talking about cars, your AC has these parts too). Banging could also indicate the compressor has gone bad and needs to be replaced.

Buzzing or humming can be a sign of a number of issues including:

  • Loose parts
  • Refrigerant leak
  • A dirty air filter that needs to be changed
  • Loose or failing blower motor
  • Condenser coils need cleaning

Unfortunately, air conditioners tend to break down when you need them most, and loud noises can be a telltale sign that your unit is about to quit. If you hear any odd sounds coming from your air conditioner, call Custom Air Systems right away. Waiting until your AC finally quits can mean more expensive repairs and can even affect your energy bill.

At Custom Air Systems, we can keep your current unit running smoothly with regular maintenance or help you choose a new unit within your budget. Give us a call today.