Return air ducts are almost always quiet. The plenum is the large metal hat attached to the top of your furnace. These noises can be described as squealing, humming, scraping, thumping, banging (usually on start-up), rattling, and rumbling. You can frame the room, then insulate the walls and ceiling (if easily accessible) with soundproofing Roxul 80, drywall and finish as required. Without decent air flow your blower motor will have to work harder, you will not get as much air into the rooms, and you could be trying to track down noises coming from the vents. (Both of these are a fairly expensive and time-consuming option.) Blower motor mount, squirrel cage, plenum, filter too small, or the furnace itself vibrating. Then I would remove all of the tape from the joints and make sure they are joined as tightly as possible. You will probably have to cut, and tape, the blankets around any ducting, plumbing fixtures, electrical wires and boxes. Your answer will be used to improve our content. Another way a blower motor gets overheated is from having bad capacitors. New furnace motors and blower fans are very quiet and most new furnaces have soundproofing material in the blower compartment. This is almost always located in the lower part of the furnace cabinet. If you decide to enclose your furnace and/or utility room, soundproofing is fairly easy. The noise only lasts for about a second or two; then there is just the expected sound of blowing air. Moreover, the motor mount may have broken causing the blower assembly to hit the housing. Cheers from Australia. You should also soundproof the ceiling to keep noise out of the attic (if there is one) because sound will also travel up there and you could hear the noise in other parts of the house. But with a bad capacitor, your blower cannot function well and may put your family’s comfort at risk. If the noise just started happening then it might be a clogged filter that can make the fan suck air from everywhere. Popcycler - It would help to know more about what portion of the furnace the noise is coming from however it kind of sounds like there may be something stuck in the inducer motor or the blower motor. Blanket off a small portion (at the top) and check how things work. Should you hear one of these noises, turn off your furnace immediately. If your noise issue is from the air through the ducting, that is most likely due to the installers not properly sizign your system. We are a locally owned and operated family business helping our customers with their heating and cooling needs in Mississuaga, Oakville and Milton. But there will be some airborne noise into the room above. If there is no damage, try lubricating the motor and restarting the furnace to see if the noise has disappeared. Because, as far as you know, it is the only moving part in there. Sometimes the noise coming from your furnace may be due to the fact that there’s a loose belt inside the furnace blower. The heart of the entire system is the furnace. When noise arrives with the heat, we either put up with it or try to make it quieter. But be prepared to discover that the blame lies somewhere else. The most frequently reported noise by far is Whistling. Broken blower wheel. But in many houses the furnace is just sitting in an open basement. When your furnace blower is making noise like humming, screeching, or thumping, it can be a sign of wear or damage. To be honest, the duct noise would have to sound like a marching band before I would take my ducts down, wrap them, and re-install them. Adding oil to your furnace requires some mechanical know-how. Be careful what you wish for. There is a huge range of furnace filters–from cheap fiberglass to washable, re-usable, electrostatic. Eliminating built-up dust and dirt (not to mention the kid’s Lego pieces) only makes it more efficient–and quieter. The transformer is a small box inside the furnace that has wire connections on both sides. Loose parts on the furnace can be the reason behind the unwanted noise you’re experiencing as the blower runs. If, after all of your diagnostics, you decide that a new blower motor is the answer, make sure that the new one has the same horsepower rating as the old one. If the blower motor isn’t secured properly, it can result in a rattling noise when your furnace is turned on. That should solve the problem. Mobile and modular homes quite often have the furnace on the main floor, producing all kinds of opportunity for Airborne and Impact Noise. Note: Although it has been used for decades to seal duct joints, some people in the industry are beginning to question the efficiency of duct tape. 1 Posts . Given my history and product knowledge, I would reach for a box of self-impaling insulation clips, glue them on the cabinet walls about 6″ apart (special adhesive sold with the clips), install my acoustic barrier and the exterior washers, and sleep well at night knowing nothing will ever come adrift. You cannot completely blanket the door or change the slab to something solid without adversely affecting the operation of your furnace. If you are satisfied everything is still OK, then continue to add until you have as much soundproofing as the furnace can handle. If you feel that sound is escaping from the joint you can add more screws, run duct tape or foil tape over the seam, or seal it with high heat Silicone sealant like Red Devil HVAC Silicone Sealant. Your email address will not be published. Other possible causes include the failure of the blower motor or capacitor. The blower motor powers the fan inside the furnace, which blows the cool or hot air from the furnace into your home. Purchased a high efficiency Carrier furnace to be installed with the build. Seems counterproductive to me. Your first step after noticing this sound should be to turn off your furnace’s motor and let it cool down. Eventually things wear, or get loose, and will begin making noise that is carried into your living spaces. (Turning my cell phone on is usually an accomplishment.) Someone with a brain .. on all counts. Here’s a guide to help you lubricate your blower motor: After doing everything possible to quiet the blower fan and motor, and the cabinet (see options listed above), you could consider trying to lift the furnace enough to get a sound and vibration suppressing membrane under to contact points. Having a piece of insulation sucked into your blower will not turn out well. Since your noise occurs in the winter time it probably is not a return air problem because the motor pulls more air in the AC mode and less air in heating mode. So the too much air theory is probably out. Main floor furnace rooms have the added problem of Impact Noise because the furnace is sitting on your framing–not a concrete floor below the living space. No, I do not use the Smart Phone App. I would use Woven Duct Strap instead of the common metal strapping. It may simply be that the motor doesn’t have enough lubrication, but it can also mean that a motor failure is imminent. Viewed 22k times 0. Bad capacitors is generally a sign of lack of regular maintenance. You may be dealing with a bad belt, a problem with the motor bearings or even a broken part. If you are hearing loud screeching and rattling noises when you turn your furnace on, the bearings in the blower motor or the blower motor itself could be to blame. If you want any ceiling soundproofing to be effective, I think you will have to address it by soundproofing the floor above. Discussion Starter • #1 • Oct 4, 2008. You only need about 20 or 30 clips and washers. What I am puzzled by is the noise that sounds like a "starter." Make sure you re-tape all joints. It is also possible that your duct cleaning contractor will point out any potential problems that he/she encounters. Active 2 months ago. A bad or faulty capacitor can exhibit many signs and symptoms. Noise from the furnace blower can be very annoying in adjacent rooms. Especially if it does not solve the problem. Still find your furnace blower motor making noise? I understand that a large fan and the movement of large amounts of air will produce some noise. If you are not filtering out most of the dust and dirt, not to mention anything else, what is the point of even having a filter? The blower wheel is attached to the blower motor shaft with a set screw. The noise is there in heat or AC. The HC41AE117 Furnace Blower Motor Replacement is a brand new OEM Upgraded 1/3HP, 115V (208/230v also available), 1075RPM, CW Rotation, 4 Speed motor that is compatible with Carrier, Bryant and Payne furnaces, as well as GE and genteq part number 5KCP39GGS336S. The more feedback you give us, the better our pages can be. Our furnace is in a central location inside of our home. Whether or not you will be able to repair the problem by yourself will have a lot to do with regular maintenance and a little bit to do with old fashioned luck. There could be several explanations for the noise, and even some you may be able to fix on your own at home. This article does not have the information I am looking for. You can also add lubricant to the bearings to eliminate the screeching sound. Reducing furnace blower noise We installed recently a new heating system that allows us to heat the house more cost and energy efficient. If your furnace blower motor hums when it’s switched on but at the same time does not actually turn, the capacitor may be damaged. Its capacitor works like a battery and stores the energy needed by the blower to work properly. Full disclosure. Just because you hear noise from your heat vent does not mean it is caused by the furnace. Your heating system is a complex combination of incoming fuel, incoming air, recycled cool air, and warm air blown into the places where it is wanted and needed. Motor is an ECM and it makes a low pitched whine sound when in CIRC or when the blower is ramping up or slowing down to stop. There is a distinct possibility that replacing your 1/3 horsepower motor with a 3/4 horsepower motor (because you want to move more heat into the living areas) will exacerbate some of the problems you are trying to eliminate. Our experienced HVAC technicians are available to diagnose and repair the cause of the noise and ensure your equipment is operating safely. Older furnaces are usually just metal boxes housing the equipment. Let’s take a closer look at some of the specific problems you may be having and what you can do to fix it. (This type of noise is different than Airborne Noise or Impact Noise which generally travel through the adjacent walls, floors, or ceilings.). An unusual sound can cause home owners to worry, leaving them wondering if there is something majorly wrong with their equipment. From the very start, the furnace was loud. I have worked as a contractor, sales person, and business owner in the construction industry for over three decades--mostly in home renovations and also as a home builder. This is a handy dandy piece of equipment that keeps harmful chemicals, like carbon monoxide, out of your home. Sound and vibrations will travel along both the ducting and framing. I know–it is way easier to bang a few dents into each duct. The low pitched whine stops when fan is in high speed. It was a 15 year old American Standard gas (80,000 btu). Screeching noises. Once it is safe to touch, examine the motor and look for any obvious signs of wear or breakage. Thumping. (Please see our article ‘How to Soundproof a Floor‘ to help you deal with that.) I have been married to the same wife for 46 years. When the furnace blows warm air the metal ducts expand from the heat. Oil Your Blower Motor . Motor Humming Without Turning . Installing an acoustic rubber pad under the furnace (specially if it is sitting on concrete) will damp the vibration you hear through the pipes.Although the blower fan and motor are the most obvious parts to check, take a look at the complete unit. Here, we’ll take a look at some of the common furnace blower motor noises and potential fixes to get your furnace running smoothly again: A humming sound is one of the most common blower motor noises reported by home owners. As long as the glue holds up. ... Motor Noise. If they cannot move lengthwise you will have something called ‘oil canning’. (Think vinyl siding that is nailed too tight. NOTE: Before checking into any of these potential problems or doing any repairs–TURN OFF THE FURNACE BREAKER , TURN THE THERMOSTAT COMPLETELY DOWN, TURN THE GAS OFF– and threaten everyone in the house with physical harm if they change any of your settings while you are working on the furnace. If you want way more information than you will ever need about HVAC systems, one of the best sites I have found is Healthy Heating. Very little on the site is about soundproofing. What to Do if Your Furnace Blower Motor is Making Noise, Air Conditioning Installation Mississauga. If you find yourself hearing a strange noise from the furnace inducer motor, we just might have the solution. If the transformer is dying or not securely mounted, it will buzz. Almost invariable it is screwed to the furnace. And the slot holding the filter was not manufactured using a micrometer either, allowing the filter to move when the fan goes on or off. So, again, your best bet is to hang soundproofing blankets on the walls. (The good news is–the plenum is not attached to the top of the furnace. I have a 6 year old ICP System with a gas furnace with a A coil AC unit stacked above. More power and speed can overpower the system because it is not designed for a larger sized motor, and you will get more banging, or humming. If the set screw is loose, the blower wheel will wobble on the motor shaft, and the wheel will be noisy as it turns. New XV80 Trane furnace makes noise when blower runs at low speed. The electric meter sends a signal to the heating system indicating the cost of the electricity. Evam Canada Heating & Cooling © 2020 All Rights Reserved. Normal sounds you may hear are tiny little pops or hums as the furnace runs. The back side is fully self-adhesive which is one of the main attractions. Sometimes, a broken blower wheel can also be the source of this distinct noise. To see if this the problem, pull out the filter and see if the whistling stops. The furnace blower, as with any fan system, makes some level of noise. Thumps and bumping noises, like an unbalanced washing machine, often indicate an unbalanced blower wheel or motor. Here are some of the reasons your furnace could be making a funny noise. Faulty duct installation can produce a banging or popping sound. Strange noises coming from your HVAC system are never a good sign. This problem can be solved very easily if you simply add a few more screws to the air duct or even put duct tape on the loose parts. Sometimes, your furnace blower motor is just simply too loud and becomes a nuisance. A screeching noise that comes from the furnace is most probably due to motor bearing problems. I follow the directions provided, or change it when my wife tells me to. If I did not care about removing them without destroying the ceiling finish I would also use Liquid Nails construction adhesive. Depending on how old your house is, your furnace may have an inducer motor. The pipe will wrinkle, or buckle, in and out because it is suddenly too long for the space it is occupying. Check … Have been in a new build house for almost 3 years. If you decide to take this route, go slowly. As mentioned, the heart of your heating system is the furnace–consisting of the heat chamber, blower chamber, attached plenum, and miscellaneous piping leading to, and from, most of the rooms in the house. The name refers to someone who is usually highly skilled in, and knowledgeable about, a multitude of things most of us know very little about. The bad news is–the plenum passes through the floor under the furnace.). Therefore, working inside them is a struggle–at best. Moving blankets will do the job. Most places will not sell them in quantities of less than 100, and the adhesive is sold by the gallon (enough to do over 500 clips). Most main floor furnace rooms are designed to use as little space as possible. However, a previously not-so-noise blower system can also become excessively noisy owing to wear and tear or other reasons. Furnaces are known for their strange noises. You may be able to blanket off some of the louvered section–if the door is fully vented–and still get enough air to enable the furnace to function as designed. The one you choose must be sized for your furnace. Evam Canada are licensed and insured HVAC enigneers with 20+ years of experience. See Types of Filters section above. We are a factory authorized dealer for Bryant but also service and install all major manufacturers including Carrier, Payne, Goodman, Keeprite, Lennox, York, Trane, American Standard and more. I'm having a bizarre issue with my HVAC forced air blower motor. I have seen a suggestion that you hammer a dent in the pipe where you think this is happening. Most modern building codes require that the furnace is in a separate room, or that the house has a door at the bottom or the stairs to separate the heating system from the living area. Furnace blower motor rattling noises can become annoying fast. Ask Question Asked 3 years, 3 months ago. If your furnace blower motor is making noise, try not to panic. Over time, the bearings in the blower motor wear out, causing the motor to become noisy. It is installed by people the construction industry calls ‘tin bashers’. Carrier/Payne/Bryant HC41AE117 OEM Upgraded Furnace Blower Motor Replacement . The professor tends to pontificate a bit but there are articles on most types of heating systems. It has very low air flow resistance (like cheap fiberglass) but has a very high filtration efficiency. (Although the pressure is fairly low, it is building up inside the plenum. I am not able to judge that, other than to make the observation that it is much thinner than it was. My preference would be to remove all of the screws, raise the plenum at least 1/8″, fill the gap with sealant, then lower it in place, and re-screw it–adding extra screws if necessary. Loud Furnace Causes & Solutions Blower Motor. You might find a siding and/or insulation company that has some left over from a job, and is willing to sell you what you need. This is called flanking noise–sounds traveling through the system that will reach into each room. It also must allow good air flow; yet filter out as much dirt, dust, bacteria, and microbes as possible. You can use duct tape or foil tape. Your blower motor forces the warm air out of your furnace … 2. Final Note: Make sure you have your heating system cleaned every year. Install them with X Fasten double sided mounting tape. There could be several explanations for the noise, and even some you may be able to fix on your own at home. If a room exists–whether the basement is finished or unfinished–I think that hanging sound suppressing blankets on the  walls, and a soundproofing curtain over the doorway are really your only viable solutions. When your furnace blower motor begins making noise, the best thing that you can do is troubleshoot the problem immediately. And the walls are likely finished with drywall or paneling. Screwing through the metal cabinet kind of defeats the soundproofing program, and you might make things way worse by drilling into something important–like your fuel line. Call a professional to examine and repair or replace the broken part before you turn your furnace on again. Call a pro if you’re unsure about tackling this job. (Note: Be absolutely certain you want the panels to be on the ceiling, or walls, permanently because once the adhesive sets removal becomes a demolition project.). Indeed, the noise level is one of the critical factors to consider when choosing a blower system. You should do this anyway to ensure no air, or whistling noise is escaping from them. A lack of lubrication can diminish your furnace’s effectiveness and cause unwanted noise. And even if it does come from the furnace it is caused by flanking noise–sounds travelling through the system that will reach into each room. If you notice the hum when the motor is slowing down, that can indicate an amperage problem in the motor. If this is the case, you may have issues with your ductwork, or might need to reduce the fan speed of your furnace. The only true moving parts in your furnace are the blower fan and motor. I have never used the product but from the information and reviews, I believe it will do the job. Hi all. Replace the belt with the correct part for your furnace if necessary (Reference your manual to be sure, or call a furnace repair specialist). The blower cabinet in most older furnaces is essentially a hollow tin box with a motor and fan hanging from the top. A screeching or squealing sound coming from your furnace blower motor could mean there is a bad belt or an issue with the motor bearings. All we do is turn up the thermostat; then wait for the heat to arrive. We bought our house two years ago and knew that our furnace was on the tale end of its life. This article contains incorrect information. How Can I Know That My Furnace Is Efficient. It is way more efficient to soundproof the floor above. They must ensure that the system they are installing has the correct amount of fuel mixed with the proper amount of oxygen (both returned from inside the house and brought in from outside) to produce the required amount of heat safely–and then be distributed throughout the building. If your furnace blower motor is making noise, try not to panic. Bubos Acoustic Panels are not only a sound absorbing product but also fire resistant and flame retardant. Specifically, it will not start and just buzzes while showing a … If you check, and the belt is actually loose, then it’s best to replace it with a new one. To truly soundproof your ducting, you can take them down and wrap them with a heat reflective insulation (which will also help prevent heat loss from the pipes), or Mass Loaded Vinyl–a great soundproofing barrier. When you hear the furnace making a humming noise, it could be a sign that your blower won’t last much longer. (2) Another problem might be a blower motor that has a weak run capacitor. It will be a small hole near the connecting point of the duct and furnace near the blower. To fix a broken blower motor, you will need the services of a heating, ventilation and air conditioning technician. If there was–I would not send you there. The blower motor – This is the most common source of humming and buzzing noises in a furnace. The door is probably engineered to supply the correct amount of return air to the furnace to provide maximum efficiency. In the winter time the blower motor runs on a lower speed. If only a section of the door has louvers, don’t mess with it. Sometimes, the mounts that hold the blower in place can become loose, which can cause your blower to become misaligned. This blower is like the motor of your machine, pushing warm air through the ductwork and into your home. Squealing sounds are caused by an issue with the furnace’s blower motor. Furnace Blower Motor Noise. Once the motor fails, it leaves you with a furnace that will not function -- not something you want to happen in the middle of the heating season. Failed Blower. (Here’s what this sounds like) One of the most common causes of furnace humming is a failed blower. The most active component in any furnace would be the Blower Fan Motor and a lot of these noises will be generated from this blower assembly. In an unfinished basement there are no adjacent rooms to be concerned about. Here, we’ll take a look at some of the common furnace blower motor noises and potential fixes to get your furnace running smoothly again: Humming Sound If your furnace blower fan is squeaking, it’s coming from either your fan belt or your blower motor bearings. In either case, it’s best to have a pro take a look at your system and determine if there is a way to reduce the noise it makes without decreasing efficiency. Once summer came and the blower ramped up for A/C, it got really noisy. The only place there could be noise is at the furnace filter. The blower motor in your furnace blows hot air through the ducts and into your home. The blower wheel blows air out of the furnace and through the house. The blower of my furnace makes a loud noise every time it starts. A blower motor or inducer motor on its way toward failing may also make a loud humming noise. ... A blower motor will get very hot if the motor is trying to turn but won’t because of some sort of blockage. My furnace, which is 13 years old, has 3/8″ acoustic soundproofing inside the blower cabinet with a cut-out for incoming air. This problem of getting a humming noise along with little to no spinning is very common with motors that … Here are some of the reasons your trane furnace could be making a loud noise. A loose belt is a common cause, but the issue may be more complex within your blower motor. As a last resort you can remove the boot (the part at the end of the duct that gets the air into each room) and cut the pipe shorter by about 1/2″ – 3/4″. It eliminates any kind of metal on metal rubbing, or tearing of pipe wrapping. Furnace blower motor makes buzzing noise and won't start. However, when your furnace is noisier than usual or you start hearing a noise you have never heard before, this usually indicates that there is something wrong with your furnace and it may be time to talk to your heating technician about some maintenance and repairs. The access panel is quite often too loose allowing it to rattle; or too tight allowing you to break fingernails removing it. When you re-install the duct work make sure that you hang them properly.

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