Your HVAC system is supposed to keep you comfortable, not make you wonder if your house is haunted. If you’ve been hearing strange noises coming from your heating or cooling system, it’s important to figure out what’s going on before a small issue turns into a big (and expensive) problem.
Let’s break down the most common HVAC noises, what they might mean, and when it’s time to call in a professional.
1. Banging or Clanking
If you hear a loud banging or clanking sound, it’s usually a sign of loose or broken components inside your HVAC system. In a furnace, this could mean the blower wheel is off balance. In an air conditioner or heat pump, it might indicate a loose fan blade or compressor issue. Ignoring these sounds can lead to more severe damage, so it’s best to get them checked out ASAP.
2. Hissing or Whistling
A hissing noise often means there’s an air leak somewhere in your ductwork or a refrigerant leak in your AC system. If the sound is coming from inside the walls, your ducts might be leaking air, making your HVAC system work harder and driving up your energy bills. If it’s coming from the unit itself, a refrigerant leak is a serious issue that needs professional attention.
3. Screeching or Squealing
High-pitched screeching or squealing noises usually point to a belt or motor issue. In older HVAC systems, a worn-out belt can cause this sound, and replacing it is usually a simple fix. If the noise is coming from the blower motor, you might have a problem with the bearings, which should be lubricated or replaced before the motor fails.
4. Rattling or Vibrating
A rattling noise could mean something as simple as a loose screw, or it could be a sign of a bigger issue, like a failing compressor. Sometimes, debris like twigs or leaves can get into the outdoor unit, causing a vibrating sound. If the noise continues after cleaning the unit and tightening any visible screws, it’s best to have a technician inspect it.
5. Clicking
It’s normal to hear clicking when your HVAC system turns on and off. However, constant clicking could indicate an electrical issue, like a failing thermostat or relay. Electrical problems should never be ignored since they can pose a fire hazard.
6. Booming or Rumbling
A loud boom when your furnace turns on might mean there’s an ignition delay, allowing gas to build up before igniting. This is a serious issue that should be addressed immediately, as it can lead to dangerous gas leaks or even damage your furnace’s heat exchanger.
When to Call a Professional
While some noises can be fixed with simple maintenance, others signal more serious problems. If your system is making persistent strange noises, it’s time to call a trusted HVAC expert. If you need help with your HVAC in Manville NJ, don’t wait—get it checked out before the issue worsens.
Call Schaible’s Plumbing & Heating Inc. today for your professional HVAC needs.