Car: 1991 Q45a Fed-Spec, IQP/White, Texasoil 9 Accumulator Recharge, '93 TCU 1st Gear Start, Loud Clicking Sound - Air Conditioner/Heater (kansas400) by repeatedly pressing the lower middle (? depending on year) and waiting until the airflow changes. Grinding, popping, scraping – all signs that you have a power window problem and should stop using the window immediately. However, never ignore noises as they can be a sign that your boiler needs to be looked at by a professional. It just mkes the funny noise when it first comes. These noises are typical. A distinctive gunpowder-like aroma could be the result of a fried circuit board or fan motor. Over a period time, overuse and aging can cause your tank to make noises - the noises will either be coming from the tank itself or the gas line. This could be the cause of my blower noise too if the door is stuck halfway and the blower air is moving it around. When the A/C is turned off, the "clicking" can be heard, fairly loud, from the passenger side dash, for about 20 seconds, then it stops. The heater, however, is producing warm air. The noise seemed to be coming from the front so I carefully unplugged the fans, one at a time and it turned out to be the small one making all the noise. If the later is the case, read on. If your rear-wheel-drive car or truck is making a howling sound that seems to be coming from out back, this can be a symptom of a problem with the differential. Its a 2003 grand am. Cavalier :: 2004 - Clicking Noise When Heater Turned On. Why is my car heater making noise when I turn it on Car is making a loud clicking noise after has been turn off and only will shut off if you unplug the battery and will resume again if you. Minerals present in the water get bumped. As the heater warms water inside the tank, air bubbles form and drift upward. A/C units tend to get louder as they get older but a grinding sound is never normal and always an indication that something has gone wrong. First noticed when it got really cold outside and I tried to warm the car up b4 driving. While the clicking noise isn’t as sinister as a loud banging or the crackling of fire coming from your utility room, it’s still important to be checked out for one of these main causes: First, Where the Clicking Originates. Are just started making a noise. If I turn the fan speed up (with the outside air option LED lit) and press the snowflake (to kick on the compressor) it doesn't make the knocking noise. so when i start up my car and turn on my a/c it makes a screeching sound and when i turn on my heater samethingand today when i got out of work it was really cold so now even when i am driving it makes that loud. So even though it's tempting to ignore it and hope it goes away, that's not a good idea. The setup is some old heat pump/furnace/water heater/etc, which all of a sudden at around 3:00am this morning decided to make a VERY loud noise. heater blower motor hi the heater blower motor on my vectra b 1. Get your car fixed. Car: 1991 Q45a Fed-Spec, Loud Clicking Sound - Air Conditioner/Heater (kansas400) If you notice the noise while the mode is changing that would be a big red. Was this something that you had to fix or replace?. It's entirely possible that the most common ticking noise is the sound you get from a slowly cooling exhaust system when the car is hot during the summer and you turn it off. Loud exhaust and high performance tires bring your car to that next level of performance but increase Corvette Noise. The amount of air coming from the vents did not seem as powerful as my 7th Gen Accord that I previously owned. The noise that you might have heard could be the heat pump going into defrost mode and the noise may have been refrigerant running through your refrigerant lines. This handy guide will walk you through the possibilities. Learn more about Chevrolet Impala at the Edmunds. It is making a cracking popping noise because the copper tubes are freezing. Hard to locate exactly from which part of the engine. I agree with checking the heater. Heater motor started making funny noise 01-29-2013 03:04 PM #1 While in the extreme cold the other day, my heater blower motor started making a deep, solid noise that gets louder the higher i turn up the motor. With car in Park if i gently rev it you hear the whine but if i turn off the heater blower noise stops,. Good day 300c owners. April 2014 in A-C, Heat Pumps & Refrigeration. Then, pulling away at a traffic light it is deafening again. noise when I turn heater on noise when I turn ac on car blower noise Ac blower making loud. All these changes cause the motor to make a lot of noise, which often sounds like rattles and loud vibrations. After noticing a very loud noise coming from somewhere in the house tonight, I tracked it down to the hot water heater in our basement. Hopefully this helps other ppl with the same issue. Yesterday it started okay but after driving ten miles, the noise began. and inside unit several thousand dollats in Late 2013 now I'm up at three a/m it's three am and the outside unit is making a knocking noise (loud) I'm just outside warranty could it be compressor again ? Subject: Ac/heater. Also please check out the statistics and reliability analysis of Ford Escape based on all problems reported for the Escape. the outside unit makes a very loud screeching noise — like metal on metal. The tech will have to examine what’s causing this. net members. Honda Odyssey aircon/heater hums so loud now!? of my 2006 Honda civic making a noise. Identifying Weird Car Noises. If the noise is a steady metallic rap, it may indicate a rod/rod bearing. Weird Noises Your Hybrid Makes—And Why By Lyndon Bell If you’re driving a hybrid, some of the weird noises your hybrid makes may be leaving you wondering what's going on in there. You will need to scroll down and search the link for the information you need to read or discuss. So any knowledge would be amazing. It sounds like the engine is revving and will go about 15 seconds and then about a minute of back to. the outside unit makes a very loud screeching noise — like metal on metal. A quick steady tap may indicate lifters or cam lobe, while a clatter may be loose/worn rocker arms. , the off button, I presume. Your air conditioner is an expensive, complicated piece of. This noise sounds like a hovering helicopter. As I sit here in bed trying to get some sleep I cannot. These common car noises can spell trouble and cost a lot of money, especially if ignored. When you turn off the line of the gas heater, the noise of running water, minimize and so in the bathroom. Also sounds like belt noise if I increase RPM quickly. A humming, grinding or hissing car noise can end up costing you. i have a 3 yr old 320i, and when i start the car up and drive around, everything's ok. The struggle between the heat and the cold moves the coils and when the ice cracks it makes a popping cracking noise. Ford Taurus Forum. Dirty, restricted or weak pilot light —If you have an older furnace,. Often, these noises while you're trying to sleep at night, can be reduced. Car: 1991 Q45a Fed-Spec, IQP/White, Texasoil 9 Accumulator Recharge, '93 TCU 1st Gear Start, Loud Clicking Sound - Air Conditioner/Heater (kansas400) by repeatedly pressing the lower middle (? depending on year) and waiting until the airflow changes. It cleans the dishes fine but the noise has me concerned. These sounds seem your car’s “cry” to tell you that there really is something wrong in your system or systems. When you turn off the line of the gas heater, the noise of running water, minimize and so in the bathroom. I think the skid plate was just magnifying the noise for the car's interior. The blower fan is under the passenger side dash, behind/under the glove box. Causes of an Air Conditioner's Buzzing Noise. Hard to locate exactly from which part of the engine. I have a 2011 LTZ and I have noticed that when I have the air conditioner on and I am not moving, brake applied or in park, there is an incredibly loud noise coming from the engine compartment. These noises should not be ignored and are almost always a sign something that has gone wrong or is in the process of going wrong. Good day 300c owners. I had to shut it off (the furnace is a gas furnace, if that helps) using a switch that was installed for that very purpose, as the unit is rather old but generally still works. So this is probably a "stupid" question but I don't really know anything about cars. I heater and a/c both still work fine. very noticeable and Honda stated "could not duplicate at this time" damnit I'm tired of this response about everything. Sometimes I can turn the heat/ac on with no noise problem but after I turn a corner, the loud rattling noise will start again. My immersion heater has started making a loud vibrating noise whenever I use the bathroom. Hello, I just recently purchased a new 2011 Lexus RX450h. What happens is the motors begin to go bad, creating the annoying noise behind your dash. It seems to only make the grinding and vibrating noise when the wash cycle starts up and then every so often it will make the loud noise again. This happens regardless of A/C or heat. A Car Clicking Noise When Turning and Accelerating = CV Joint Failure. the noise is steady and goes away after 5-10 seconds. dejongmc wrote:Sometimes there is a loud ticking noice coming from the engine. Very loud noise. On low setting the fan sounds normal. Why is My Car Making a Squealing Noise? 6 Car Noises and Their Meanings. It is a little engine with only 2. I go to get back in my truck, and crank it, and nothing. its like a growling soundused to be just a quiet clicking but now its loud as f**k and really annoying lol it basically does it when it wants to. Unusual sounds tend to be a bad sign, so if you think there may be a problem with you propane tank, read on to find out what the noise indicates, or get in touch with us at Northwest Propane. Posted on 5/2/2017. A variety of noises can be produced. Identifying Weird Car Noises Back Chrome Data makes no guarantee or warranty, either expressed or implied, including without limitation any warranty of. It's pretty loud when it happens however. My 2005 Jeep Grand Cherokee started making a loud clicking noise for about 10 seconds, shortly after starting the Jeep. 290, 1st FLOOR REPLACE ELEMENT IN HOT WATER HEATER IN B-452 101220 REPAIR LEAKING TOILET IN BLDG. You can get so used to it you don't even notice it's on. We tend to laugh when we hear a car or truck going down the street making some hideous exhaust sounds, but in some situations, a problem in the exhaust system can mean more than a loud engine, it can mean dangerous exhaust gases are leaking into the passenger compartment. I have a 2011 LTZ and I have noticed that when I have the air conditioner on and I am not moving, brake applied or in park, there is an incredibly loud noise coming from the engine compartment. Do you hear a high-pitched, tuning-fork type of sound coming from your return air vent, the metal grille that pulls air into your heating and cooling system? It's a situation we hear happening to several homeowners. Newer systems are engineered for quieter operation, but even a quiet system makes a few characteristic noises that shouldn’t alarm you. These common car noises can spell trouble and cost a lot of money, especially if ignored. Audi allroad - Loud fan-like noise when car is running - As long as the car is running, I just started getting this fan-like noise. So my heater just started making this really loud squealing noise. You could try draining the water heater to. when u hear from outside its like an aeroplane engine. Why Is My Car Making Gurgling Noises? by Richard Rowe. It sounded as if the engine would fall apart. Your car engine is making unnatural noises and you don’t have the slightest idea what it could be. Air Pockets in the Heater Core. Why Is My Heating System Making Banging Noises? Manager. A humming, grinding or hissing car noise can end up costing you. Wheel bearing? On my 2002 Dodge grand caravan the blower motor for the a/c - heater unit is making a loud humming noise and not running as fast as it used to. If you notice a loud, buzzing noise coming from your air conditioner, chances are your unit is malfunctioning. This must have happened last time I changed the cabin filter The reason for the post is to hopefully prevent people from tearing apart. When they freeze up they collect ice on them. Then, pulling away at a traffic light it is deafening again. Once the car warms up, it stops making noise. My husband … read more. If the screeching noise is still happening from your blower motor, either the noise is coming from a different part of the motor, in which case I'm little help, or you just haven't gotten the bearing loosened from the motor shaft. When I turn it right up it makes a really loud noise and you can feel the vibration in the truck from it. A distinctive gunpowder-like aroma could be the result of a fried circuit board or fan motor. The strange noise you hear is the bubbling sediment — and a sign that the tank is probably experiencing fatigue and may be facing premature failure, says Kuhn. First step is to take out the glove box by removing two screws. Today it's started making a really loud noise from the engine, it sounds like a fan, the noise stopped and started a couple of times, the engine temperature never goes over 90. I am now getting a pretty loud buzzing noise when the car is at idle. If you have a unit that has a TXV valve for refrigerant metering then the valve could be noisy. This noise was already there before the belts were replaced. Yes it makes some noise but for the price it works awesome! I am using it with a 20lbs bottle from Lowes and works great. My 2 year old Astra had it's second service last week. The dirt causes a delay when igniting, which leads to excessive gas buildup, so when the burners finally do light, it creates that loud banging noise you hear. Leaves and debris gets in the blower motor and make a clicking noise when the fan hits the leaves. Belt noise will come from under the hood, and on most vehicles it is towards the passenger side. I have a Citroen C3 Sx 1. Hello, I have a 2008 Avenger SE. January 06, 2012. gurgling noises are the sound of air or water moving around in your cooling system. If your interior AC/ Heat fan (blower motor) is making noise like a card in a bicycle spoke, then you probably just need to clean out the blower motor which is easy and. Its a loud whirring noise and rattle (sounds like a fault fan?!!) and once the air system has been turned off, its slowly. Any ideas are greatly appreciated. You will find the blower fan is like a hamster wheel. In terms of severity, the problem could be on either side of that. It started off as a low cricket sound, then it has elevated to a LOUDER sound. Whenever I turn my heater on I hear a squeal, and it does it only while the heat is on. This fan also makes a lot of noise trying to blow air when th. When the noise happens it clicks on and goes fo. Air Pockets in the Heater Core. A car's climate control systems include components that can can produce a clicking noise if they fail or require service. the automatic heater system in my '98 grand prix gt is making a really loud whining noise when i turn it on. If the boom or banging noise is located at the heater, a delayed gas ignition is most likely the problem. A lot of air is trying to make it through a smaller area, and thus you get the high-pitched whistling noise. At first it was only making the noise when it started to blow air, but now it does it at intermittent times while it's blowing air, and every time it starts up. Sounds similar. 08 GLI, starts the car and for a few seconds, loud and clear, you can hear a buzzing soundstays on for about 5 seconds then goes off. They said because it is a Hybrid. a loud snapping/clicking noise can be heard from the water heater. I even get the noise when starting the truck first thing in morning. It is located in the center of the dash. Thumping noise from ft heater box. Reactions: it's why Hyundai fitted such a loud system. Send us your comments if you have any. Once the joint is making noise, you cannot add grease to the damaged joint and make the noise go away, the CV joint needs to be replaced. I find that very hard to bel. when heater on, making high pitch whirling noise ? And being a brand new car, it shouldn't have weird noises like this. mostly happens when im driving tho. If your car makes noise when accelerating. 5 HVAC System Sounds You Don't Want to Hear at three a/m it's three am and the outside unit is making a knocking noise (loud) I'm just outside warranty could it. If it’s making a lot of noise when turned on, it may be because calcium deposits are being left behind due to hard water in your area. Why Is My Water Heater Making a Knocking/Rumbling Noise? Does your water heater make a knocking/rumbling noise that could wake the dead? If so, your water heater tank has most likely collected a thick layer of sediment (minerals like calcium and lime). C280 making loud humming noises from the vents. But, when there is too much sediment on the bottom of the tank the heated water makes its escape with anything from a 'wheeze' to a 'gurgle' to a resounding 'pop. Very loud noise. Never overpay with the RepairPal Price Guarantee(TM) Learn More. Bubbling noises from radiators are quite a common issue, but dealing with this problem does not necessarily require any specialist technical expertise, and you may be able to stop the annoying bubbling in a few minutes with the right tools. It's pretty loud when it happens however. I turned on the heater in my car today only to hear it making an extremely loud noiseat first, i didn't know what it was but then turned heater up and the noise kept getting louder the higher the heat was on. 456 79891 87709 RESET THERMOSTAT … Fetch Full Source. Causes of an Air Conditioner’s Buzzing Noise. It is making a cracking popping noise because the copper tubes are freezing. The most common description of the noise is a whining sound that gets louder as the engines RPMs increase. Do you have a clicking or ticking noise coming from the lower right side of your dashboard? This is a common issue with all Nissan Titan or Armada models from the 2004 to the 2014 model. Different noises can mean different things. 6 Loud Air Conditioning Noises and Their Causes. This fan also makes a lot of noise trying to blow air when th. It made it when I flushed the toilet and turned on the cold water tap. When I turn the defroster on it makes a wierd noise! Service & Maintenance When I turn the defroster on it makes a wierd noise! It's a loud buzzing noise. ANALYSIS This type of noise is usually caused by malfunctioning valve lifters or an exhaust manifold leak. I notice it only happens when left in the cold all night. While in the extreme cold the other day, my heater blower motor started making a deep, solid noise that gets louder the higher i turn up the motor. Loud exhaust and high performance tires bring your car to that next level of performance but increase Corvette Noise. When you turn off the line of the gas heater, the noise of running water, minimize and so in the bathroom. Sound is coming from the passenger side dashboard/glove compartment area. As the heater warms water inside the tank, air bubbles form and drift upward. com FREE DELIVERY possible on eligible purchases. If the noise goes away, it's being radiated into your system due to the receiver's proximity to a noise producer (like a heater motor or car computer). Over time, the fan may become noisy--usually making a chirping or squealing sound, though it may make a loud groaning noise instead. If Your Furnace is Making a Booming Noise. Last year hadn't to have the Heater valve replaced. When I crank it up a loud humming noise is heard that sounds like it is coming from the dash. It is possible that a stray leaf or piece of debris is stuck in the blower fan blades. It made it when I flushed the toilet and turned on the cold water tap. Air filter noises are all too common in residential heating and air conditioning equipment and there are many causes. Also, when you go to the bathroom, you here the same sound like running water enveloping the room. A few days ago the AC started to make a loud roaring noise when it is turned on full blast. Ford Escape owners have reported 32 problems related to loud engine noise (under the engine and engine cooling category). It's cold out, but I'd been driving my car for about 3 hours prior and I was almost home when it started. This is the first time its ever happened and it does it all the time now. A humming, grinding or hissing car noise can end up costing you. What could be the knocking noise coming from the engine area? There is a knocking sound that started coming from my car a couple days ago. Loud noise coming from the heater fan usually means the motor is about to go. Background Noises • Ambient Sounds • Relaxing Music | myNoise ® Set this page as the default landing page : yes • no. When possible (and when it makes sense), we can also tie new supply registers into your ductwork or increase the size of existing supply registers. I notice it only happens when left in the cold all night. It stops when you turn. "Your car is making funny noises? Bring it right in. Sounds bad any ideas were to start. The heater, however, is producing warm air. A loud boom or bang coming from your furnace could be one of two things. Blower making high pitch noise. I didn't remove the shroud to expose the fan but that certainly seemed to be where the sound was coming from. Where is that whistling noise coming from?. Lay down on the ground next to the vehicle. Should you notice your air conditioner making any weird and uncommon sounds, it is important to know what they may signify and the best way to treat it before any damages can be caused. If the noise goes away, it's being radiated into your system due to the receiver's proximity to a noise producer (like a heater motor or car computer). ) I owned the. Any ideas are greatly appreciated. so when i start up my car and turn on my a/c it makes a screeching sound and when i turn on my heater samethingand today when i got out of work it was really cold so now even when i am driving it makes that loud. “A lot of sediment builds up at the bottom of a hot water tank, and that sediment works like an insulator,” forcing the burner to work harder, Kuhn says. Its 10 above out and when I turn my blower fan on it makes this extremely loud noise. What is that Mysterious Noise? Four loud "WHUNG!" noises when the furnace fan comes on, or goes off. and inside unit several thousand dollats in Late 2013 now I'm up at three a/m it's three am and the outside unit is making a knocking noise (loud) I'm just outside warranty could it be compressor again ? Subject: Ac/heater. Over a period time, overuse and aging can cause your tank to make noises - the noises will either be coming from the tank itself or the gas line. When they freeze up they collect ice on them. What could it be? I'm affriad its gonna crap out and leave me stranded in the 0* weather w/ no heat. It might sound like a lot, but regular preventative maintenance is the best way to keep those strange car noises - and accidents - to a minimum. Tighten the transformer if the furnace fan makes a humming or a buzz sound after the fan goes off. If your car makes noise when accelerating. It makes noise when i accelerate, but even more noise when i take my foot off of the gas after the acceleration, but is usually quiet when the car is at a stop. An electric fireplace can start making funny noises for several reasons. Hi all, In the last week the interior heater fan has started making a strange noise - a much louder hum than usual that sounds a bit like a swarm of bees! At its worst you can also feel a light vibration through the steering wheel when it's doing it. This post will help you troubleshoot an electric fireplace making funny noises. The dirt causes a delay when igniting, which leads to excessive gas buildup, so when the burners finally do light, it creates that loud banging noise you hear. If I turn the fan speed up (with the outside air option LED lit) and press the snowflake (to kick on the compressor) it doesn't make the knocking noise. Normally, you should hear or feel nothing when the air conditioner is working except the cold air coming from your car’s heating/cooling ducts. Sounds similar. My 4 ton trane unit makes the same bang noise when the outside unit shuts off. Want to know what to do to fix it. A Florida Tech Explains. 6 Loud Air Conditioning Noises and Their Causes. Hopefully this helps other ppl with the same issue. I had a couple incidents where as soon as I would turn on my car it would make a very loud squeal for about 15. You could try draining the water heater to get some of the sediment out, but honestly it's probably too late for that - might want to have a pro come out and take a look at it. My dishwasher has been making loud grinding noises during the wash cycle. In another circumstance, when your automobile is running at low speed the noise keeping coming out of car engine. My 2 year old Astra had it's second service last week. ”Here are six common car noises people hear and. 5 HVAC System Sounds You Don't Want to Hear. There is a possibility though that the noise is being caused because the radiator (and indeed all others). This handy guide will walk you through the possibilities. 5 HVAC System Sounds You Don't Want to Hear at three a/m it's three am and the outside unit is making a knocking noise (loud) I'm just outside warranty could it. Dealer changed blower motor, but did not resolve issue. A chugging noise could mean a blockage in the exhaust system. It's common to hear gurgling under the dash if there's air in the system -- coming from the heater core. Symptom: Your water heater is making a popping, rumbling noise. Then it's not only alarming, it might be dangerous. Previous Next BudAshes Lifer. I posted about the heater noise in mid Dec. Whining noise when heater is turned on. Car heaters that don't blow at all. Is your car making noise? Do you need help trying to find it? I'm sure with the tips outlined here you'll be able to figure it out. I noticed it starts when the car is idling for a while. it is exactly zero degrees outside and we had a really bad snow storm last night. The smaller the fan, the faster it has to turn and the more noise it has to make to move a given volume of air. You will need to scroll down and search the link for the information you need to read or discuss. “A lot of sediment builds up at the bottom of a hot water tank, and that sediment works like an insulator,” forcing the burner to work harder, Kuhn says. Most noisy heater fans can be quieted with a simple repair. Some noises coming from your furnace are normal and indicate your furnace is working correctly. So my heater just started making this really loud squealing noise. My Furnace Smells Like Burning Dust. The only way I can get the noise to stop is by turning off the heater and it stops after 3-4 seconds. Ford Taurus Enthusiast Site. My heater is making noise all of a sudden. Noise from a bar or similar business, including noisy patrons outside the bar, may be not just noise but disorderly conduct. "My wife loves itGreat for my useIt generates a good amount of heat just a little loud if you are trying to sleep - but again it is a spot heater and most of them are rather loudTakes a bit to warm up to where a larger space could feel the heat but when it does, it does put out sufficient heat to make the space very comfortable" "". Improper bleeding of the engine's cooling system results in air pockets getting trapped in the core. 2012 Patriot 113K miles. One of the most common noises your air conditioner or heater will make is the sustained, quiet hum of properly functioning machinery. heater make a loud jet fan noise when on, it is quiter whn the AC is operting I believe. Car seems to run good. There is a possibility though that the noise is being caused because the radiator (and indeed all others). My air conditioner makes that noise as well but my heater was always fine until this evening. I have a 2010 hyundia,please reply if you can help me with this problem. ) I owned the. If you use a portable space heater, try to find one with a thermostat so you have the safety feature of automatic turnoff as well as the energy-saving feature it provides. My Car Makes a Noise! Under The Hood. You don't need to be a pro to get the job done successfully. Some engines are just known to burble, and the noise gets more pronounced when you install something like a short-ram or cold-air intake. Minerals present in the water get bumped. Its a 2003 grand am. If your car makes noise when accelerating or turning, don't ignore it. I know Im not answering your questions the best. When possible (and when it makes sense), we can also tie new supply registers into your ductwork or increase the size of existing supply registers. Whining noise when heater is turned on. Is your water heater making a popping noise? Here's what's causing it and what you need to do to fix it. Why Is My Water Heater Making a Knocking/Rumbling Noise? Does your water heater make a knocking/rumbling noise that could wake the dead? If so, your water heater tank has most likely collected a thick layer of sediment (minerals like calcium and lime). A lot of air is trying to make it through a smaller area, and thus you get the high-pitched whistling noise. It made it when I flushed the toilet and turned on the cold water tap. I had a couple incidents where as soon as I would turn on my car it would make a very loud squeal for about 15. Anyone had this experience or heard of this problem? Saw a couple small posts around the internet but not much and no explanation. Since the radiator making the noise is hot throughout, then its probably not air-locked. It wasn't a high squealing noise rather dull sound that was unbearable. Now you should be able to spin the fan without the motor making any noise. Heats up quickly. 5 HVAC System Sounds You Don't Want to Hear at three a/m it's three am and the outside unit is making a knocking noise (loud) I'm just outside warranty could it. I've got a 2004 Cavalier and when the heater is turned on it makes a clicking noise (sounds like someone on a snare drum playing over and over again) You can feel it if you touch the bottom of the Heater/AC module on the passenger side of the car above your feet. You might be sweaty, but that’s a little less heat in the cooling system. Heat pumps do make strange loud noises especially in the wintertime. If the squeaking is only in the heat /defrost mode it may just be a loose belt even though it is in heat the a/c compressor is running for the defroster, check the condition of the a/c compressor. If this is the case, switch off the air conditioner to avoid damaging the motor. I had a large piece of fuzz caught in the wheel that made this awful noise when the fan was on 3 or 4. The dealer told me it was normal. This noise was already there before the belts were replaced. What is that noise - diagnosing car noises, symptoms and possible solutions. 6 Loud Air Conditioning Noises and Their Causes. Just to make 100% sure, I had to check. Submit comment: Submit comment. You will be surprised when you go to buy the part at the dealer at how they may recognize the part number and tell you how many they have sold that day! You can only get this part new at the dealer. Just a loud roar.