Why Is My AC Making A Loud Noise When Starting Or Shutting Off?

Why Is My AC Making A Loud Noise When Starting Or Shutting Off?

Causes For AC Making A Loud Noise
If you only hear the noise when your unit turns on, the compressor motor is a likely culprit. Another warning of this possibility is if you notice a decline in the cooling output.
Another possibility could be a issue with the dampers. Some air conditioning systems have dampers to change the amount of airflow reaching different parts of your home. The slamming noise is likely the damper closing after the AC shuts off.
You may also be hearing loud creaking noises from the ducts expanding and contracting from pressure and temperature changes if you have sheet metal ducts.
There could also be a problem with the fan or air handler that’s causing the blower wheel to bang against another part of the unit. In some cases, the fan’s mounts can get loose and throw it off balance as it slows down, causing it to hit its enclosure.

Leave a Reply

Your email address will not be published. Required fields are marked *