If you’ve recently upgraded or installed a new heating and air conditioning system, you probably noticed that it’s a lot quieter than your old system.
Manufacturers are constantly improving their equipment to lower noise levels, which is why you’ll notice that newer systems show off their decibel (dB) rating as a unique metric for improvement.
While quiet operation is becoming more standard, your system may throw different kinds of noises during normal operation. These noises typically come during startup or shutdown, depending on the equipment you have.
If these noises become persistent and more noticeable (or recently just started) it might be a sure sign your system needs to be checked out by a professional.
To help you know what kinds of noises you should be worried about, here are 3 of the most common ones you may hear and why your system may be making them.
Loud banging or clanking noises coming from your system most likely is a sign of a loose or broken piece of equipment.
A common source of this type of noise is the compressor of your system and should be looked at by a professional as soon as possible.
Clicking and/or rattling noises could be a few different things. If the sound is repetitive or rhythmic in nature, there’s a good chance that a fan is either failing or off-kilter.
The other source of this noise could be an electrical issue with a relay, thermostat or other type of control.
Either way, these could lead to larger problems if not addressed so if they are newly forming or getting worse it’s time to call a local HVAC contractor to diagnose the exact issue.
If you hear screeching or a loud “scream” from your system, this is absolutely abnormal so to avoid further damage to your system be sure to turn it off until you can get a professional out to take a look at it.
That particular noise means something has gone seriously awry in a motor or the compressor. Though your A/C has several safety features to turn off automatically when this happens — if it is indeed your compressor that’s going bad — pressure could still build to dangerous levels. This is why it’s important to turn it off immediately when you hear these types of noises.
Just like any large mechanical system you have (like your car), it’s always better to have a professional diagnose and remedy the solution. It can sometimes be a very difficult, long process to pinpoint the source of the noise, but with well-trained and experience ears, it will be much faster.