An HVAC system that hums along quietly is a homeowner’s best friend. But what happens when it starts making unusual noises?
Those sounds can range from annoying to downright alarming and they are often a sign that your system needs some attention.
Let’s decode those noises and help you take steps to fix them before they turn into costly repairs.
1. Banging or Clanking
If your HVAC system sounds like a drummer’s practice session, you might have loose or broken parts inside the compressor.
Over time, these components can rattle and hit the unit’s casing, creating loud banging noises.
What to do – Turn off the system immediately to avoid further damage. This is a job for a professional, who can inspect the compressor and determine if repairs or a replacement are needed.
2. Screeching or Squealing
Does your HVAC sound like it’s auditioning for a horror movie?
High-pitched screeching noises often indicate an issue with the fan motor or a worn-out blower belt. Bearings inside the motor may also be the culprit.
What to do – Shut off the unit and call an HVAC technician. They can lubricate the motor, replace worn parts, or clean out debris causing friction.
3. Humming
A low, persistent hum might not seem like a big deal, but it could point to electrical issues. A faulty contactor relay switch or loose wiring could be the source of the noise.
What to do – Don’t ignore electrical problems. Turn off your HVAC system and contact a professional to diagnose and repair the issue safely.
4. Buzzing
Buzzing noises can signal anything from loose fan blades to dirty condenser coils. In some cases, a refrigerant leak might be to blame.
What to do – Check for visible obstructions like dirt or debris around the outdoor unit and clean it gently. If the noise persists, call an expert to inspect for leaks or damaged components.
5. Rattling
A rattling sound often comes from loose debris like leaves or twigs caught in the outdoor condenser unit. In more severe cases, it could indicate deteriorating internal parts.
What to do – Turn off the system, carefully clean out the debris, and check for loose screws or panels. If the sound doesn’t stop, it’s time to schedule a professional inspection.
Silence Those Noises for Good!
Weird HVAC noises are more than just annoying they are a sign your system needs help. Don’t wait for small problems to become big ones!
Sierra Air Inc. can diagnose and repair your system, ensuring it runs smoothly and quietly. Call us today to schedule a service and enjoy peace of mind with your HVAC system!