A healthy AC runs with a steady hum. New, loud noises are your system telling you something is wrong — and the type of noise narrows down what.
What the noises mean
Banging or clanking often means a loose or broken part in the compressor or a fan blade out of balance. Buzzing can be electrical — a failing capacitor or contactor. Screeching may be a motor bearing or belt. Rattling is frequently loose hardware or debris in the unit.
Which need immediate attention
Electrical buzzing, grinding, and anything from the compressor should be checked promptly — running through them can turn a small repair into a major one. Turn the system off if the noise is severe and call for a diagnosis.
Talk to a local expert
Have a question about your specific system? Bertie Heating & Air has served Gainesville and North Central Florida for 20+ years. Call (352) 331-2005 for honest advice, a fast repair, or a free in-home estimate.