AC Repair
Why Is My AC Making Strange Noises?
2026-08-18 5 min readBy Launch Air & Heating
Buzzing, banging, or squealing from your AC? Each sound points to a different problem. Here's your guide.
What Your Noisy AC Is Telling You
Different sounds mean different problems.
- Buzzing: Often electrical — a failing capacitor or contactor.
- Banging or clanking: A loose or broken part, often in the compressor or blower.
- Squealing: A worn blower belt or motor bearing.
- Clicking (constant): A control or relay problem.
- Hissing: A possible refrigerant leak.
- Rattling: Loose hardware or debris in the unit.
Don't ignore it
Strange noises usually mean a part is failing. Catching it early prevents a bigger breakdown.