Strange noises coming from your HVAC system can be unsettling and may be a sign that something’s wrong with the unit. While occasional sounds are normal, persistent or unusual noises often point to an underlying issue that shouldn’t be ignored. From banging and rattling to clicking and hissing, each sound indicates different problems, ranging in severity from minor problems to major concerns.
Recognizing these noises and understanding what they mean can help you take action early, potentially saving you time, money, and discomfort down the road. In this blog, we’ll walk you through six of the most common sounds, what causes them, and when it’s time to reach out to a professional for support.
1. Rattling
If you are hearing rattling noises in your HVAC unit, there are a few potential causes. One reason for this rattling is loose components or panels in the system. Over time, regular use can loosen screws, leading to this sound as the system runs. Additionally, this may indicate debris presence within the system or a potential problem with the blower motor or fan.
While you may be tempted to address this sound on your own, it’s always best to rely on your trusted HVAC technician for support. They can perform a full inspection of the system, find any loose components, remove debris, and address any blower motor or fan problems before they lead to further damage within the unit.
2. Clicking
When your HVAC system makes a clicking noise, this is often a sign of electrical or mechanical issues. A faulty relay switch, capacitor, or contactor may cause this clicking. It may also be an indication of a bent or broken fan blade, damaged compressor, or loose, cracked ductwork, allowing air to escape as the system functions.
If you believe you are experiencing electrical or mechanical problems within the system, it is best to turn to an HVAC professional for support. Attempting to remedy this problem on your own may result in injury and additional damage to the unit. Your HVAC team can identify this problem and make essential repairs before your system is irreparably damaged.
3. Banging
Not all the noises you hear coming from your HVAC system are immediate cause for concern; one of those noises is banging. Sometimes, the banging from your system results from expanding and contracting ducts as the system heats up or cools down. However, if this banging doesn’t subside after the system has run for a while, you may have another problem.
Some banging is the result of debris obstructing airflow through your ducts or problems within the blower or compressor. If the noise doesn’t go away, it is essential that you work with an HVAC team to assess and repair the unit. Failing to address this banging may result in the breakdown of the system over time.
4. Squealing
Squealing noises coming from your HVAC unit indicate major problems within the system, all of which must be addressed by a trained HVAC professional. In some cases, it may be as simple as loose components. However, more often than not, this indicates problems with the fan or motor wearing down over extended use.
It may also be a sign that the bearings within the system are going bad and that your system may be on the verge of breaking down. While repairs may be adequate to keep the system running for the season, it may be in your best interest to consider making the upgrade and replacing your old furnace or air conditioner to avoid future problems.
5. Hissing
A hissing noise coming from within your HVAC system is often a sign that there is a leak within the unit. Most commonly, this signals a refrigerant leak. If left unaddressed, this leak can reduce the efficiency of your system, leading to higher energy bills as your system struggles to keep up with your needs.
However, this may also be a sign of leaky ductwork. No matter what is causing this noise, it is important that you reach out to an HVAC team for support. Reduced system efficiency can quickly add up. The sooner your trusted team comes out to assess the system and ductwork, the sooner you can thoroughly address the problem and restore system efficiency.
6. Thumping
If your HVAC system is making a thumping noise, it’s often a sign that something is loose or unbalanced. Common causes include a misaligned blower fan, loose ductwork, or debris caught in the system. Over time, parts can wear down or shift, causing repetitive thumping when the system runs.
Sometimes, the noise may come from a failing motor or a disconnected fan blade. Ignoring these sounds can lead to more serious damage and costly repairs. To fix the issue, turn off your system and inspect visible components for anything out of place. However, the safest solution is to call an HVAC technician to diagnose and repair the problem before it worsens.
Helping You Address All HVAC Noises
No matter what HVAC noises you’re experiencing, having a reliable team of technicians makes all the difference. If you’re looking for a trustworthy team in the Roy, Utah, area to help you address any HVAC problems, turn to our R&D Heating & Air team for support. For over a decade, our team has provided comprehensive HVAC services to homeowners across the Wasatch Front.
Whether you’re dealing with minor system problems or major breakdowns that have rendered the system inoperable, our team can help you through it all. With our support, you can restore the function of your system and comfort in your home. Don’t let another day go by with an improperly functioning HVAC system.
Contact our team today and trust that we have the training, tools, and experience to protect your HVAC system from further damage.
