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Noises from Cooling System? When to Phone HVAC Repair in Great Falls

by Marquette Turner Luxury Homes

in Features, Trades & Utilities, Variety

Air conditioning technology has evolved immensely over the past couple decade. Systems that were once extremely noisy, are now almost completely soundless. Running at a low 40 decibels, 20 decibels softer than a normal conversation, it’s important that you are aware when your cooling system is generating more noise than usual. 

Living in Great Falls during summer will have you endure heats of up to 29°. It’s important that you are aware of any changes in your system to ensure a cool temperate room.  Change in volume and sound might mean that something seriously is wrong with the system. Phoning your local Great Falls VA HVAC repair service company should be your first option. 

Here is a list of sounds you shouldn’t ignore.


There are many parts inside your air conditioning system that you aren’t even aware of. If it’s making any banging or clanking noises, it might mean that one of these parts are either broken or loose. 

This could be the cause of a variety of different things such as:

  • A loose or broken piston pin, crankshaft, or connecting rod
  • Unbalanced blower or fan blades
  • Problems in the compressor

When loose parts bang against each other, it is a big problem. When you don’t phone a repairman, the broken parts will only further damage each other. Causing bigger problems in the future. 

White air-conditioning units - Photo by Gervyn Louis on Unsplash - Marquette Turner Luxury Homes
Photo by Gervyn Louis on Unsplash


A high-pitched whistle or scream sound can indicate that there is extremely high pressure inside the aircon’s compressor. Another cause might likely be a refrigerant leak. This can be extremely dangerous. 

Modern aircon systems have sensors that detect these kinds of situations. Therefore, it will switch off automatically. Don’t be frantic in trying to switch it on again, you might worsen the problem and cause extra damage. Phone a professional immediately. 


It’s natural for many cooling systems to create a thin layer of cold evaporative droplets around the fanning system. But when this dripping becomes more severe and causes big puddles of water, there is something seriously wrong. 

Perhaps a pipe has burst or there is a leak in other parts of the lining. Get this patched up before it destroys the whole system. 

Watch this video to see how a leak can easily be fixed by a technician: https://www.youtube.com/watch?v=LkhJOe79Gd0


You’ll notice a soft click noise when you switch your device on or off. This clicking sound is normal for most cooling systems. When this sound continues after you’ve shut down your system it might mean that something more serious is going on. 

Especially if it sounds like something electrical, it might mean that some electrical parts inside the unit are damaged. A failing thermostat, disconnected electrical cables, or a defective control setting can be the cause of the constant ticking noise. 


Most probably your AC system has a unit that’s situated outside your home. If there are any buzzing or humming noises escaping from it then it can be a series of problems. 

At least it can indicate that your air filter, coil, unit, or fan blades need a good clean or have to be replaced. 

More serious problems could be that the fan motor is loose and rubbing against another AC part. Other parts that could be failing or loose are the copper lines, condenser coils, or motor. 


A high-pitched squealing noise indicates that the fan or blower motor are in need of replacement. It could be that the fan is squealing because it has become rusty as a cause of not using it in a while. Or just because it has been working really hard and now needs replacement.  

Be aware of the sounds coming from your AC system. Especially if it’s an unknown sound that has increased in volume, you should definitely not leave it unattended. Trying to fix problems yourself, without any experience can be disastrous for your cooling system. 

To avoid a small problem turning into a disaster you have to phone a HVAC repair service to tend to the problem. Phoning an experienced technician to locate the cause of the noise, is better than fixing the whole system once it completely breaks down. 

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