Common HVAC Sounds and What They Mean

HVAC Sounds - Tech working on HVAC unit - Greer's Heating & Air

Silence the Strange Noises

Your HVAC sounds are generally a rhythmic hum while it keeps your home comfortable season after season. But what happens when that familiar hum takes a turn for the worse? Strange noises coming from your heating and cooling system can be unsettling, leaving you wondering if it’s time to call in a professional.

Fear not! Most HVAC noises have a specific cause, and some are more serious than others. This guide will help you decipher those strange HVAC sounds and determine the next steps.

Dethroning the Clanging King

  • Banging or Clanging: This sounds like loose or broken parts within your unit, like a detached blower motor or a loose connecting rod. Don’t ignore this one! It can lead to more significant damage if left unchecked.

Squealing Symphony

  • Squealing or Screeching: These high-pitched shrieks are often associated with a belt-driven motor. The culprit could be a slipping belt or a failing motor bearing. Addressing this promptly can prevent a breakdown.

The Hissing Sound

  • Hissing: This sound can indicate a refrigerant leak, gaps in your ductwork, or even a clogged air filter. A refrigerant leak can impact efficiency and requires professional attention. A clogged filter restricts airflow, causing the hissing and reducing performance.

The Buzzing Bee

  • Buzzing: A buzzing sound can have several causes, including loose screws, a failing motor, or dirty coils. Dirty condenser coils can cause the unit to work harder, leading to buzzing. A professional can diagnose the exact cause.

Clicking Concerto

  • Clicking: While a slight clicking sound during startup or shutdown is normal, persistent or irregular clicking might indicate a defective control or a failing thermostat.

When to Call the Professionals

If you hear any of these HVAC sounds, it’s always best to err on the side of caution. Ignoring these noises can lead to more expensive repairs down the road. For any concerning sounds, contact a qualified HVAC technician to diagnose the problem and recommend a solution. Greer’s Heating & Air serves clients all over the Triangle Area of North Carolina.

Remember: Regular maintenance is key to preventing strange noises and keeping your HVAC system running smoothly. Don’t wait for the symphony of strange sounds to begin – schedule your maintenance appointment today!