In most HVAC systems, there are two types of vents that facilitate the flow of cooled or heated air in your home: supply vents and return vents. It’s normal for these vents to make a low humming noise during operations. However, when the noise they make changes into something out of the ordinary such as a whistling, banging or hissing sound, it may be time to contact your local air conditioning and heating repair service.
Noisy air vents are rarely the main issue. These problems are usually just a symptom of a bigger and more serious issue within your HVAC system, and understanding what’s causing the noise is necessary in order to find a solution. Let our professionals at Allison Air Conditioning help you decipher loud vent noises to figure out what they’re saying.
The Problem With Supply Vents
Supply vents are directly connected to the blower fans, and are responsible for circulating cooled or heated air from either your air conditioner or your heater into the various rooms of your home. Odd noises coming from the supply vents will usually come from these fans, which is why they’re checked first by your heating or air conditioning service technician. However, it’s also not uncommon to hear flapping noises as well, which are a sign that the joints between duct sections have loosened and are hitting each other as they’re moved by the air.
Return Vent Troubles
Return vents are where “to-be-processed” air flows into your furnace, heater or air conditioner. Whistling noises are the most common problem with return vents, and these are often caused by dirty, clogged filters. Sometimes you might also hear loud knocking and banging noises, which usually indicate a small component has become loose within the machine. Your HVAC contractor should be able to properly diagnose the problem and apply a suitable fix.
Hearing Odd Noises From Your Air Vents? Let the Best HVAC Contractors Help!
At Allison Air Conditioning, our experts can help you with all your HVAC repair needs. Give us a call at (951) 356-4224 or fill out our contact form to schedule a service visit today. We also offer free estimates on new installations. We serve Corona and all surrounding areas in CA.