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There is a sqeaking noise coming from 1 vent nothing in it that i can find it is blowing air through the vent but it is making an aweful noise..i checked the unit outside and it sounded normal...

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I beleve your hearing the fan or fan moter

Posted on Feb 02, 2010

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Posted on Jan 02, 2017

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HVAC or Air Conditioning System Noise


Ever wonder why your <span style="font-weight: bold;">air conditioning system</span> is so makes so much more noise than other systems that you see? Do you have to turn up the volume on the TV when the A/C starts up? Do you have to more to another spot in the house when you are on the phone because the air started to blow? I will offer some suggestions as to how you can <span style="font-weight: bold;">make your air conditioning system quieter.</span><br /><br />The main thing that you need to identify is that the noise is coming from the <span style="font-weight: bold;">air moving through the vents</span>. Then make sure that the vents are not broken or partly closed. If they are partially closed then you need to find out if they are just closed by mistake or to<span style="font-weight: bold;"> balance the system.</span> Remember that if you close some of the vents then the air moved by the blower will have to be<span style="font-weight: bold;"> forced out </span>of the other vents in the system. If there is too much air for the remaining vents to handle then they will become noisy. Sometimes there just simply is not enough space for the air to get out because there is a <span style="font-weight: bold;">shortage of vents installed in the system</span>. I have seen many systems that are this way because the <span style="font-weight: bold;">contractor chose to skimp to cut costs on the installation.</span><br /><br />Another place that many contractors chose to cut costs is in the <span style="font-weight: bold;">balancing dampers</span> that should be installed in the takeoffs from the main trunk lines of the ductwork. The absence of these dampers forces you to <span style="font-weight: bold;">balance the air flow with the dampers in the floor or ceiling registers</span>. This restriction at the point of entry into the room makes noise and is very annoying. Simply<span style="font-weight: bold;"> installing dampers at the correct location</span> so that the branch lines can absorb the noise will solve that problem.<br /><br />As you can see there are some things that can be done to <span style="font-weight: bold;">eliminate noise</span> that comes from your <span style="font-weight: bold;">HVAC system.</span> If your contractor tells you that there is nothing that can be done about your noisy system keep on looking till you find a <span style="font-weight: bold;">competent contractor</span> that can help you find the source of the problem and correct it. Your system does not have to wake the dead forcing you into all kinds of inconveniences because of the noise. With proper planning and the proper amount of supply and returns with dampers in the right locations, you can have a very <span style="font-weight: bold;">quiet and comfortable system.</span>

on Feb 21, 2011 | Heating & Cooling

1 Answer

Cold& warm/air would not blow out in any vents. Put in new direction switch, air blow in all vents except the defrost vent. Swtich on defrost and it blows in dash vents in your face and nothing coming out...


The switch that controls the air flow is either operated /controlled using either wire, pneumatics, or electrically driven/controlled. Make sure that all of the connections at the damper are intact and working properly. Pneumatically driven is usually the most common on todays vehicles, so make sure you don't have a vacuum leak on any of the damper hoses.
I hope that you have found this information to be useful, and if I can be of any further assistance, please let me know. Thank you for using fixya!

Aug 01, 2013 | 1993 Chevrolet Corsica

1 Answer

Why is there no air blowing out my dash vents?


the air vent is control in your consul maybe is not properly set up check to the a/c technician

Jun 17, 2013 | 2001 Hyundai Elantra

1 Answer

A/C blows from defrost and floor vents, nothing from dash vents.


the switch where you turn it to blowing at your head is probably out. you will need to replace the switch control where your defrost, foot, head etc. what make, model, year is your vehicle?

Jul 09, 2009 | 1994 Toyota Camry

1 Answer

Car Fan Motor will not blow air, though it makes noise...


Likely you have a blend(air control) door that is malfunctioning or you have debris stuck in blower fan (you would not believe what I have found in some) If noise changes, likely the motor is working and the problem is not electrical.

Jun 09, 2009 | 1996 Chevrolet Lumina Mini

1 Answer

Squeaking noise from front end in cold weather


Bad ball joints. check out front end and make sure nothing else is bad. Good lucka nd thanks for using FIX YA

Mar 03, 2009 | 2002 Oldsmobile Intrigue

2 Answers

Faulty Fan Heater - The main vents are just blowing out cold air.


all cars have a recycled air weather its called max or just recycle its doing the same thing. So if your getting cold air in one spot and hot in another it means your vents are not blocking where they are suposed to. It could be just a simple fix, by getting into the dash where your vent controls are and looking at the flap that tells air where it can and cant go. if its stuck then it needs to be cleaned and oiled. If the cable is corrodend clean it and oil it so it can move freely, or just reconnecting it may be the fix. it sounds like you are going to have to be adventurous, and play with the mechanics of your vents. Typicaly theres really nothing tough there to work on, just REMEMBER WHEERE ALL THE SCROOS AND CLIPS GO. I have forgotten where a few went in the past and had to listen to sqeaking noises till I took it apart again. There are vent seals wich are no more than the weather stripping you buy at the hardware store the 1/8 inch thick tape. You may need to thin it down with a razor, usually not. but it works great for fixing the seals in car heaters, because its the same thng just a different color. Which no one will ever see.

Feb 01, 2009 | BMW 525 Cars & Trucks

1 Answer

Unable to change the blower position, air is just coming out from the dashboard vents, moving knob doesn't change air direction. also when blower is set at 3 0r 4 unable to turn the temperature down....


the air will not blow through windscreen vents but is blowing through every where else. makes no difference when changing the direction of the knob to the windscreen only. you can hear the air blowing but nothing comes through?

Apr 29, 2008 | Daewoo Heating & Cooling

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