Air conditioners create condensation as they remove moisture from the air. Once the water is removed from the air, it splashes into a drip tray inside the air conditioner. Therefore, the dripping sound is a sign that your air conditioner is working properly and doing its job.
This noise is normal. As normal as the whir of the fan blades and the hum of the compressor when switching on and off. Your air conditioner doesn’t use water to cool the fresh and relaxing air that’s passed through your home, but water is a by-product of the air conditioner’s important job.
Whirring: Some describe this noise as a washing machine; This noise does not usually mean there is a problem. HVACs, like every other piece of equipment in your home, have many moving parts, so it’s normal to hear noise; that just means it works!
If the vent does not fit snugly in the supply air duct to which it is attached, air can escape around the outside of the vent as well as through its fins. When this occurs, condensation can form and eventually leak down, causing the sound of water dripping from your vents.
Typically, a whirring noise in an air conditioner is the result of poor bearings in the indoor fan motor or a defective fan in either the indoor fan unit or the outdoor unit. A whirring air conditioner noise may occur if the blades detach or the fan falls apart.
ACs rarely just explode. But they can overheat and catch fire. This fire could cause the compressed gas to explode.
So if you turn on your air conditioner and hear a rattle, it may mean you have a faulty or bad air conditioner compressor. A rattling or loud humming noise from your car’s A/C that gets worse when you accelerate can both be signs that you need to replace your A/C compressor.
If you feel air on your hand, the connection is loose and there is an air leak. A common place for leaks is the duct connections. With the HVAC system on, carry an incense stick or incense stick steadily along the ducts and listen for movement in the ducts – this indicates air is escaping the duct system.
Air conditioner squeaks because the V-belt is worn or misaligned. On some air conditioners, a belt connects the motor and fan.