Air conditioners runs using motors and fans, so they can never run silently. However, the construction of standard split system air conditioners removes a great deal of the noise from the house by placing the compressor and exhaust fan outside. Inside the house, most of the sound will come from the indoor blower fan, water dripping from the evaporator coil, and the movement of air through the ventilation ducts.
This is the basic “white noise” of summer—until it isn’t. A rise in sounds from the air conditioner, and this includes a noisier outdoor unit as well, is a problem. And not just because it can be annoying. Let’s look into what can be done about a noisy AC.