8 HVAC Noises You Shouldn’t Ignore

8 HVAC Noises You Shouldn’t Ignore

8 Noises you shouldn’t ignore.

Hearing strange noises coming from your HVAC? You may have grown used to the quiet hum that your unit produces, but it’s crucial to pay attention to any new, uncomfortable noises or sounds. Of course, not all noises indicate that you’re facing a crisis, but the majority of HVAC noises indicate that it’s time for maintenance or repair.

Here are some examples of those sounds and their possible sources, as well as some suggestions for putting them to rest.


These noises are usually caused by something coming loose in the motor or blower. If the banging becomes more pronounced, it’s likely that whatever was loose has now broken off.


This could indicate that the compressor is malfunctioning. The pistons can make this noise as the device starts to fail.


If your unit hisses, especially while it isn’t running, it could be due to a leaking refrigerant line, an internal valve leak, or an excessively high compressor pressure.


This could indicate a number of issues, including loose parts, debris, a loose fan motor, the need to replace the air filter, or a refrigerant leak.


If your device clicks frequently, or more than at startup and shutdown, it could indicate a problem with the electrical control system. A faulty relay or a thermostat issue could be the source of the clicking.


This could indicate that the motor is out of balance or that there are loose parts. The louder the noise, the more urgent it is to have it looked at. Humming could indicate a malfunctioning motor or a strained compressor.


This could be an indication of a failing component, such as a motor bearing trouble or a broken belt. If your belt is damaged, it may break, causing your blower to come to a grinding halt. This could result in more damage, therefore it’s critical to have it looked out before the belt snaps.


If your unit is generally silent but suddenly begins to make noises, you should contact an specialist immediately.


The importance of keeping your system and equipment in good working order cannot be overstated. It’s critical to ensure that the complicated equipment that feeds your heating, ventilation, and air conditioning is running at peak efficiency.

A maintenance schedule can help to limit the number of unanticipated issues. It also gives you the peace of mind that your system is functioning properly.

  • Regular Decreased utility bills – When your system runs properly, it is more efficient.
  • Fewer repairs – Keeping up with maintenance can help you see minor issues and address them before they become serious problems.
  • Reduce instances of catastrophic failures – System inspections help reduce the possibility of this kind of devastation.
  • Increased equipment life – Maintaining your equipment will help it last longer. By ensuring that everything is working properly, you can extend the life of your unit.
  • Safer operation of equipment – If a system isn’t working properly, people can be physically harmed. A faulty system, for example, can cause carbon monoxide to flow into the residence. This can have disastrous consequences, such as hospitalization and death. To avoid incidents like these, you must ensure that all of the components are in proper functioning condition.


While it is important to have your system inspected by a professional, there are certain things you can do to help prevent system breakdowns. These steps will help reduce potential problems and will help extend the life of your unit.

  • Change the air filter regularly – A dirty air filter is one of the main reasons why and AC unit could breakdown.
  • Check for water leaks – As you change your filter, take a quick look at the area around your AC unit.
  • Clear around outside unit – Cut the grass and trim the bushes around your outside condenser unit so it can properly breath.
  • Open air vents – Keep your vents open and clear of obstructions to avoid possible breakdowns.

When you need your equipment serviced, it’s critical to choose a qualified expert. If you wait too long to address any new sounds, you risk causing harm to your system, which will cost you extra money to repair. Big Fish HVAC provides a high-quality, professional service you can rely on. We’ll precisely identify any issues and properly maintain your equipment.

For help with fixing noises contact us today at (512) 653-1414 or click here! 

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