When it comes to the HVAC system, it’s like the central hub of the home. When everything works as it should, folks are happy and rarely even notice the system that spans throughout the home. It’s when the strange noises start appearing that questions are raised. No one wants to deal with the uncomfortable temperatures that a malfunction could lead to. Funky noises should be addressed immediately to prevent further damage and or a complete system shutdown. If your air conditioner is making a loud noise, it’s time to investigate. In this article, we want to talk about some of those mysterious sounds and where they could be coming from. First, let’s talk briefly about the system and its components.
The Inner Workings of Your HVAC System in NY and NJ
HVAC stands for Heating Ventilation and Air Conditioning, and the system consists mainly of heating and cooling sources. The thermostat typically acts as a control unit, whereas the ductwork is used as a vessel to spread the air to the needed locations.
The Most Common Heating Parts
- Furnace
- Boiler
- Heat Pump
The Most Common Cooling Parts
- Evaporator
- Compressor
- Condenser
Common HVAC Noises and How to Address Them
Noises can range from just about anything. Some noises like vibrating could be normal, while others could indicate a serious issue at hand. “Why is my AC making a loud noise?” you may ask. Well, here are some of the noises you may hear coming from your system as well as what they could mean.
Buzzing
Buzzing is one of the more common noises you may hear. With that, there are unfortunately an array of reasons as to why. For example, there could simply be a loose part that you may need to tighten or fit into place. Or, we could be looking at a refrigerant leak, which typically makes your unit freeze up a bit. Sometimes this can be resolved simply by shutting the system off for a few hours. It could also mean that something is stuck in the outside unit, and simply clearing out the debris could resolve the problem. Buzzing noises can also point to dirty air filters, loose fan motors, or a bad condenser fan, to name a few.
Squealing and or Screeching
One of the worst auditory noises if you ask me. This issue could lie in the lack of lubrication, so simply adding some lube to things may clear up the dreadful noise. Keep in mind your system needs specific lubricant, not just any ol’ household version you find laying around in your toolshed. Another reason could be a failing part, typically something related to the motor. And if I were to be even more specific, it’s typically either the bearings or the belt that are at fault and need to be replaced.
Banging, Thumping, or Rattling
Typically, this slew of sounds indicates that something has come loose, and if the sound increases in volume it probably means that something has become broken. If you can’t decipher where exactly the noise is originating from, best to call a professional to take a look.
Thwapping
A weird phrase/sound, but you’ll know it when you hear it (it’s kind of like if you were to add playing cards to the wheel of your bike and take a cruise). Typically, there’s just something stuck in the blower’s fan blades, and a simple clean-out should remedy the situation.
Repeated Clicking
On average, clicking points to a poor connection. Whether it’s the connection between the compressor and thermostat, or an electrical control connection, a technician will be able to point you in the right direction with this one.
Grinding
Grinding typically indicates that something is damaged. You could have a damaged compressor valve, blower fan bearing or blade, or condenser fan bearings. It’s best to turn off the system and investigate, clean off the area that’s causing the noise and tighten any parts that may be loose. If the noise persists, reach out to a professional as a part replacement may be necessary.
Whistling or Screaming
High pitched noises go hand in hand with blockages. It’s kind of like your system screaming for help. It may be a dirty air filter that’s causing the problem, or it could be a pressurized refrigerant leak. Don’t ignore this warning sign and act as soon as you hear it.
Hissing
Typically hissing is associated with a leak. The location of the sound can help point to what kind of leak it is. For example, if you hear the sound from your furnace, you may have a leaking air duct. If you hear the sound from your AC compressor, it could indicate a refrigerant leak.
Wrapping It Up: Keeping Your HVAC Quiet and Functional
It’s important to stay on top of things to prevent further damage, so reach out to a pro as soon as you notice something is off. It’s important to note that noises from the HVAC system are relatively normal, it’s when you notice new noises that you should do a double take. If you ever find yourself with doubts or worries, it’s always best to reach out to the professionals –like Green Ductors – for help and peace of mind. Don’t rely on Google to solve your “hvac making loud noise” woes. And as always, one of the best forms of prevention is regular maintenance, so don’t wait and schedule your next appointment today! (888)334-1612
