What’s That Noise? HVAC Sounds You Should Never Ignore
Your HVAC system works hard year-round to keep your home comfortable, but when it starts making unusual noises, it’s usually a sign that something needs attention. You may notice weird rattlings when your system turns on, or maybe you’re heading heavy banging throughout the night. Each of these sounds can be cause by a different issue. Ignoring these sounds can lead to bigger problems, higher energy bills, or even complete system failure. Here are five common HVAC noises you should never ignore:
- Banging or Clanging
- Squealing or Screeching
- Rattling
- Hissing or Whistling
- Buzzing or Clicking
1. Banging or Clanging
Some people notice banging or metal-on-metal sounds coming from their unit. These can occur when the unit is turned on, or right as they turn off.
A loud banging or clanging noise typically comes from loose or broken components inside your system. In furnaces, this can indicate a delayed ignition or a malfunctioning blower. For air conditioners, it may point to a loose fan blade or debris caught in the unit. Ignoring these noises can cause further damage and expensive repairs, so it’s best to call a professional as soon as you notice them.
2. Squealing or Screeching
Squealing or high-pitched screeching is usually a sign of a worn-out or misaligned belt in your blower motor. Your system is working overtime on overused piece, causing extreme wear and tear on your unit. It can also occur if motor bearings are failing. Addressing this early not only prevents more serious damage but also ensures your system continues running efficiently, saving you on energy costs.
3. Rattling
Rattling sounds often indicate loose panels, screws, or ducts. This may not be a major issue at first, but without proper checks, you can easily miss a major issue in the works. However, it can also signal that internal components are moving out of alignment.
While a minor rattle might seem harmless, persistent rattling should be checked promptly to prevent internal damage or reduced performance.
4. Hissing or Whistling
Hissing or whistling noises can mean air is escaping from ducts or that your system has a refrigerant leak. A refrigerant leak reduces cooling efficiency and can damage your compressor. Hissing in furnaces may also indicate gas leaks, which require immediate professional attention.
Not only can this hurt your unit, but it can also affect your air quality, efficiency, and temperature in your home. If you’re hearing a whistle or hissing noise throughout your system, get it checked out immediately, especially before the fall season.
5. Buzzing or Clicking
Buzzing or repetitive clicking can be caused by electrical issues, such as loose wiring or failing contactors. It may also occur when relays or capacitors are malfunctioning. These problems not only impact your system’s performance but can also create safety hazards if left unaddressed.
Understanding HVAC Sounds with Beach Air
Fall is the perfect time to ensure your HVAC system is in top shape before the winter months. Scheduling maintenance with a trusted provider like Beach Air HVAC can prevent costly repairs, improve energy efficiency, and extend the life of your system.
At Beach Air, we’re here to make your coastal home is as comfortable and stress-free as possible. Whether you’re looking for a full system replacement, a tune-up, or honest advice, our licensed technicians are ready to help. We are your trusted local HVAC technicians ready to take on any problems you may have year-round. Learn more about how we can help or give us a call at 843-796-3798 for a consultation.