A noisy air conditioner can quickly turn from a mild annoyance into a sign that something is wrong. While some sounds are harmless, others may indicate issues that need attention. Understanding the source of these noises can help you know what’s going on before calling in professional help, giving you better information so your AC repair technician can provide a faster solution.
Banging or Clanking Sounds
Loud banging often points to a loose or broken part inside the unit, such as the blower assembly or motor. If you hear clanking, it could mean something has shifted out of place, causing parts to knock against each other. This kind of noise should never be ignored, as it can lead to further damage.
Buzzing or Humming Noises
A steady buzz or hum can sometimes be related to electrical components. Issues with the contactor relay switch or capacitor are common culprits. On the other hand, a faint humming might simply mean the system is working harder due to restricted airflow. Checking for a clogged filter or blocked vents is often a good first step.
Clicking Sounds
Hearing clicks during start-up and shutdown is normal, but continuous clicking can be a red flag. It may suggest a failing thermostat, electrical problem, or even debris lodged in the outdoor unit. If the sound persists, it’s best to have it inspected right away.
Squealing or Screeching
High-pitched squeals are typically related to fan belt or motor bearing issues. In older systems with belt-driven motors, worn or misaligned belts may be to blame. In more modern units, screeching could indicate motor problems that require immediate attention.
Rattling or Vibrating
Rattles often come from loose screws, panels, or fasteners. A vibrating outdoor unit may also mean it isn’t sitting evenly on its base. Tightening visible hardware and checking that the unit is level can sometimes quiet the noise, but persistent rattling could signal a larger issue inside.
Weird AC Noises? Call Hammer’s
Recognizing common AC noises can give you a better idea of what’s happening with your cooling system, but repairs should always be handled by trained technicians. At Hammer's Heating and Cooling, we provide expert cooling services throughout Pitt Meadows, BC. If your air conditioner is making unusual sounds, contact us today to schedule an inspection and get your system running smoothly again.
