Tech Tip Tuesday

Is That AC Noise Normal or a Sign of Trouble?

Your air conditioner makes some noise when it runs, but how do you know what’s normal and what’s a warning sign? Understanding the difference can help you avoid breakdowns, costly repairs, and uncomfortable surprises.

Normal AC Noises - These sounds are usually nothing to worry about:

Low humming or whirring: This is the sound of the compressor and fan doing their job.

Whooshing air: Air moving through your ducts when the system turns on or off.

Soft clicking: Normal when the system cycles on or off or when the thermostat sends a signal.

Occasional dripping: Light condensation draining away, especially in humid weather.

If your system has always made these sounds and nothing has changed, you’re likely in the clear.

Noises That Mean It’s Time to Call a Pro - These sounds are not normal and should be checked out:

Banging or clanking: Loose or broken parts inside the unit.

Grinding or screeching: Worn motor bearings or fan issues—this can lead to major damage if ignored.

Hissing or bubbling: Possible refrigerant leak or airflow problem.

Loud rattling: Debris in the unit or parts coming loose.

Buzzing: Electrical issues or failing components.

Tech Tip Tuesday Takeaway

Ignoring unusual noises can turn a small fix into a big repair—or even a full system replacement.

If your AC starts making a new, loud, or unusual noise, don’t wait. Turn the system off and schedule a professional inspection. When in doubt, it’s always better to ask than to guess.