You may have noticed that a lot of the possible causes of this unusual noise have something to do with electrical components or the connections themselves. These Noises Are Most Often Because of an Electrical Problem To make noise in the first place, it’d need to be close enough to something that could cause it to rattle against the unit housing. If this is the source of the annoying sound, you shouldn’t hear it for much longer after the AC shuts off. This can happen to both the indoor and outdoor unit, and will make a variety of noises depending on where the object is lodged. There’s always a chance that a screw has rattled loose or a piece of debris has gotten trapped somewhere inside the system. When this part makes a sound, it may have failed and will have to be replaced. The outdoor unit also houses the relay switch, an important component for stabilizing the voltage that enters the system. A bad connection could produce a similar buzzing sound, and since it’s outdoors, it could be a while before you notice it. But instead of sending cool air into your ductwork, this fan is used to dissipate the heat collected from indoors. If the sound is coming from the outdoor unit: Just like the indoor unit, the outdoor unit has a fan and motor. It may continue to run after a cooling cycle is over if there’s still moisture that needs to be removed. This component helps drain excess moisture away from the rest of the AC system. Occasionally, however, the noise comes from your condensate pump. A faulty electrical connection will sometimes cause the motor to produce a buzzing sound regardless of if the air conditioner is on. If the sound is coming from the indoor unit: When noise is coming from the indoor unit, it can often be because there’s something wrong with the blower motor. If the noise you’re hearing isn’t coming from either of these units, the problem may be located inside the ductwork itself. This cooler air is sent to the indoor air handler, which ensures the conditioned air is sent into the ductwork. The outdoor unit disperses the heat collected from your home and cools it down with the refrigerant. Your central air conditioning system is made up of two units. Tracing the sound back to the source can help the technician explore the possible causes. First, Find Where the Sound is Coming From In the meantime, here’s some useful information about why your air conditioner could be noisy. Otherwise, your air conditioner might stop working entirely.Ĭalling a professional technician is the best idea when your air conditioner is making noise, since they can quickly determine the source and start repairs. Whether it’s a faulty motor or an erratic electrical connection, it’s worth looking into. But if a buzzing kind of sound persists even after your air conditioning shuts down, it may be because something isn’t working properly. Most people expect their air conditioners to make a bit of noise when it’s running.
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