A mechanic said that the bearings on the ac compressor are bad. Unfortunately, BMW does not sell the components, only the complete compressor assembly. One of the things I noticed was a whining noise coming from the left side of the engine bay. " This type of noise from the compressor can indicate a dangerous situation. Whining noise with AC on. My car started doing this recently. Sometimes a refrigerator will develop a problem and a high pitched noise can be heard. Peters, Town and Country and Weldon Spring, MO. Typical Subaru Air conditioning Problems explained. Car AC Refrigerant In this scenario people might try adding refrigerant on their own. Almost sounded like the noise a car makes when the power steering fluid level goes too low and the power steering squeals. 00 for replacement. As temperatures dropped, heater would get engaged and with it came a barely noticeable whining noise. I talked on Friday to a buddy who owns a shop, he suggested pulling the pulley and pressing in a new bearing, $20. You really notice it taking off from a stop up until the truck shifts out of 2nd gear (it may be that road noise masks the sound when up to speed). AC compressor making noise squealing. Still makes the noise a few seconds after the car is turning off. The dealer confirmed that it is in fact the AC compressor making the noise. Usually lasts 10-15 seconds before stopping. Can low refrigerant cause the AC compressor to make noise? Best Answer: Yes the compressor oil will leak out with the Freon and you could be low on oil in the system. You might want a local AC shop check the AC compressor to see if it's starting to go. Start the Car. Have to turn the car off and let it sit. The car was serviced by a Subaru dealer in January and they didn't mention it. Scroll compressors produce a characteristic buzzy noise at initial start up. This, however, is not a permanent fix and the problem should be tended to by an AC repair. Something between grinding and whining. Practically everything has been changing the AC system except for the lines. In fact, this is one of the most common noises central air conditioners make. Should I keep running my AC? No. Be sure to slightly tilt the compressor back and forth a few times to help the oil reach the oil drain hole. Whining noise with AC on. The air conditioning system has the responsibility of ensuring proper ventilation in the car. If the noise still persists, then the problem lies somewhere in the drivetrain or transmission. 2007-2008 Cadillac Escalade Models. Air conditioner noises: How to diagnose & repair air conditioning compressor noises from the compressor/condenser, air handler, duct work, filters, or controls Diagnose & repair air conditioning system noises: compressor, fans, air handler, ductwork Recordings of air conditioner or heat pump noises & sounds Air conditioner buzzing may be just a loose part Air conditioner humming, clanking. My initial fear was that the noise was coming from the transmission, as it sounds like a whine that increases and desreases with engine revs, however, I realised that it stopped when I turned the A/C off. Contacting a professional technician for an inspection is the best step to take. There are many reasons why your AC could be making noise, some easier to fix than others. Last friday on my way to work my car through the message "Check Coolant Level". Noisy new AC by Payne. But I've noticed that as the compressor engages (it's a variable displacement compressor and so presumably when it's "called upon"), it makes a bit of a whining/grinding noise, which stops as the displacement drops back to zero. Central air conditioner units are meant to provide cooler temperatures for your home whenever you need it. Just wondering what the typical causes of a noisy compressor are. I listened to the noise with a mechanics stethoscope and determined that the noise was either coming from the air conditioning compressor pulley bearing or the belt tensioner. They said it's normal when I brought the issue up to them a long time ago. Two equipment elements; the compressor and the motor, generate the noise produced by the air compressor. Peters, Town and Country and Weldon Spring, MO. It continues to whine in that rpm range while maintaining that speed, so it is not just during the accelaration. Is it just a bad clutch on the compressor? is it fixable or does it need to be replaced. Whine To isolate the noise. Hello: If you leave the A/C compressor on,Does it seem to put out cold air. AC System that is function correctly will eventually freeze the. We also offer whole home dehumidifiers which will significantly decrease its level as well as lengthen the life of your AC unit! How to fix a squealing AC. This is only once the car has stopped, and only when AC is on. When we turn on the AC, we hear a high pitched noise coming from the compressor outside. Keeping the batteries cool is vital to prolonging their life, and preventing early capacity loss. Something between grinding and whining. Do you hear your air conditioner making a humming noise? An AC hum is usually not a concern, unless the sound varies greatly from its typical sounds. Using a motor lubricant or spray lubricant on the motor shaft can temporarily relieve the noise. 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. New Sanden Compressors are pre-charged with 7. Hi, it is possible that the compressor needs replacing, however,. I have the exact same noise/issue and my car has 91K miles, but I've had the noise since around 80K. I took my 06 Solara to DCH Toyota on PCH here in SoCal South Bay. A little noise when your air conditioner starts is normal. I was told that the noise that I hear from the engine is a bad AC Compressor. In the soundfile attached the car is in P. Mufflers can also make this type of noise. This just leaves the compressor as the culprit. One of the things I noticed was a whining noise coming from the left side of the engine bay. Replied by barneyb on topic AC compressor noisy when engaged after freon add That kinda surprises me. Click on one to find out more about what makes noise in that part of the car. 2 oz of PAG Oil. They may already be familiar with the problem. 5 seconds, which decreases in frequency/volume as the compressor stops. Humming noises can indicate the starting capacitor is starting to fail or a bad motor. You really notice it taking off from a stop up until the truck shifts out of 2nd gear (it may be that road noise masks the sound when up to speed). I know I end up replacing the compressor clutch on this one but I also cover some other items that might make noise and how to fix them. The noise only occurs within the first couple minutes of start-up. There can be a lot of clunks, squeaks or hums that can indicate a wide variety of other problems, but a whining power steering pump us usually very distinctive. Would be really neat if it. Connect a Digital Multimeter to your battery and test for AC voltage with the vehicle running. Anyway my issue is a whining noise from the aux belt area that gets louder with revs. But if I hear the sound, I can stop it by turning off the AC button. Can you explain what is actually happening when this occurs? thanks. You may have to register before you can post: click the register link above to proceed. My car has about 2200 miles. But I've noticed that as the compressor engages (it's a variable displacement compressor and so presumably when it's "called upon"), it makes a bit of a whining/grinding noise, which stops as the displacement drops back to zero. When you hear a buzzing noise from your AC, you could be experiencing one of the following issues:. It does it whether the AC is on or off and my AC has not worked for at least a year. Locating the source of the whines by ear is challenging for mechanical novices. Identifying Weird Car Noises. Automotive Air Conditioning Information Forum (Archives) My car AC compressor clutch does not engage? Grinding noise from compressor- still blows cold Pages. Hello all, I am getting a loud whining noise that gets louder as the rpms go upit changes sound to more of a metal on metal sound when you turn ac offso I am thinking it's ac compressordoes anyone have and ideas and how to write up on changing thisif it is the compressor am I able to just put the clutch kit in it or should I change the entire compressorit's just the clutch kit. PO used noisy lifters on a rebuild, so I just add the whine into the pot of other strange noises. I'm probably heading to the dealer to deal with a whining noise (happens when truck is either parked or while driving) under the hood. Take the serpentine belt off, start the engine and see if it went away. We teach you how to change the air conditioning in your muscle car and have some helpful tech tips so that you can stay cool this summer. I saw one old posting when searching that reported similar noise when the AC was disengaged, and that was due to insufficient belt tension. You really notice it taking off from a stop up until the truck shifts out of 2nd gear (it may be that road noise masks the sound when up to speed). More of like bearings or something. Can you tell me if the whine of the air conditoner can be fixed? This happens -once in a while- after I turn off the ignition. Recently, I've started to hear this whining/humming/squealing noise when I hit the brakes and bring the car down to below 35 mph. The air conditioning system has the responsibility of ensuring proper ventilation in the car. Also noise just dont start but rather progresses from AC compressor noise (gets slowly louder and louder) Its the first year that my truck did that so i am curious as what is happening. AC System that is function correctly will eventually freeze the. The unfortunate truth is that engine noises can mean anything from a simple quick-fix, to a complete engine overhaul that may not be worth the money if your car has some gnarls in its beard. car reviews and news Do not touch. Something between grinding and whining. It is not happening only during the cold start, but the noise is always there till the AC is on. I just got the system flushed, leak checked, converted to R134A, and of course more oil added. 2002 325xi 5spd here's the symptoms-This whirring/whining/humming noise is only heard when the AC is on. It doesn't sound like the belt, really. We had the HVAC contractor who installed the system come out today, and he said that the noise was coming from the freon hose. It's built into this car's way of running such that if broken. Yesterday I had my car and AC on when I realized I forgot something in my house, and when I got out to go get it I heard this super loud whining/fan like noise. My car has just recenlty started making this noise. 7L V6 and am trying to diagnose a new whining noise under the hood. Causes of a High Pitched Whining Noise in a Ford Lincoln Navigator is to figure out when the the whining noise is occurring and what part is running or operating. When the electric compressor clutch is disengaged, the pulley spins freely. If your air conditioner is noisy, AC technicians recommend checking the quality of the noise first before identifying the source. Most likely cause: Your compressor. This, however, is not a permanent fix and the problem should be tended to by an AC repair. It makes a bad bearing noise changing tone with the rpms. Wind noise, passenger and driver side 2. Loud whining noise started after approx. The most common transmission problem that causes a whining noise is low transmission fluid. The pitch of the whine raises with an increase in RPM and the noise only happens when the compressor is engaged. The whine gets louder the faster I go (accelerate) and quiets down (practically stops) when I let off the gas. This has never happened previously until the system was repaired and recharged this time. the whine is mostly from the interior, not so much noticeable from outside. Its not the cycling of the compressor. the compressor - so if. Sounds to me like the AC compressor might be making the noise. These are UAC CO 4918AC – An Outstanding AC Compressor for Car, ACDelco 15-20941 – A Superb Compressor for Your Vehicle, UAC CO 10736C - A Great Compressor for Truck, Suv and Car, New AC Compressor Kit – An Effective Kit for Honda CR-V and Si Coupe, RYC AC Compressor and Clutch – A Great Package for Your Vehicle. This could either be the air conditioning clutch or the serpentine belt slipping. It looks like the air conditioner works intermittently. Replace AC Compressor 2. It's best to catch problems when they are small to avoid costly and extensive repairs or needing to completely replace your air compressor. My AC is making some noises and and was wondering if any of you guys could offer some insight. When the air conditioner is engaged, a squeal will be obvious if the serpentine belt is worn and slipping, if the belt tensioner is malfunctioning or if the clutch bearings in the compressor are going bad. Practically everything has been changing the AC system except for the lines. the whining goes away above 2000rpm and below 1800 rpm. If it sounds much louder than usual, you may have a bad bearing or pulley on one of your belt driven parts — the alternator, power steering pump, water pump, AC compressor or supercharger could all be the culprit. Common air conditioner compressor noises Banging or clanking: Banging and clanking are noises that are most often heard due to a loose part somewhere in your compressor. Tesla has replaced the AC compressor once, & a few weeks after that, serviced the car for the AC noise & lack of cooling. Can a bad cooling fan clutch cause the belt to squeal? I have had the air compressor replaced and all new belts. Modern engineering has made driving a car easier on the ears than ever. I have a 2000 mustang gt with a ac compressor noise. The noise was definitely a bearing sound. INFORMATION ON THE JAGUAR AIR CONDITIONING: BASIC SYSTEM OPERATION. This past Friday made a 865 mile road trip when idling or moving at low speed both the wife and I could hear this noise. Ever since i bought the vehicle on a hot day when i turn on the a/c after parking the car in the sun, i start getting a whining noise in the a/c. The whining can come from the alternator, filter, chassis, steering wheel, air conditioning clutch belt, pulley bearing or the fuel pump. It changes directly with the engine speed getting louder at higher rpm's at constant speeds or under acceleration loads. Tell them it is no longer blowing cold air. Over the past few weeks I have noticed when I turn on or off the AC I get a clicking noise that last for about a minute. When it is warmer and the metal is expanded slightly, I think this provides enough clearance for everything to turn smoothly. Also see one of the best simplified diagrams for automotive air conditioning. Don't worry, if the HVAC is making a buzzing noise you're not alone. Is it OK to leave it alone, or do I need to look. The clutch on the alternator has nothing to do with the fact that your car has an automatic transmission. A mechanic said that the bearings on the ac compressor are bad. Additionally, a banging noise could mean you need a new compressor. The noise BTW sounds almost like a supercharger whine. It vibrates through the brakes a bit. Another possible reason is if let it set over winter it could have rusted motor bearing's,last thing to check would be a internal transformer. Mostly it's when I first start it. Almost sounded like the noise a car makes when the power steering fluid level goes too low and the power steering squeals. Another cause could be twigs or leaves that have clogged your system. Here are some of the more common types and causes of A/C compressor noise. Can you tell me if the whine of the air conditoner can be fixed? This happens -once in a while- after I turn off the ignition. The pitch of the whine raises with an increase in RPM and the noise only happens when the compressor is engaged. Scroll compressors produce a characteristic buzzy noise at initial start up. Contact Hydes whenever your air conditioner is making noise. The master tech said because each engine and AC compressor is different (when compared to my fancy Acura ILX), that's why the ILX doesn't have a whine and TLX does. I was told that the noise that I hear from the engine is a bad AC Compressor. Pulley: If the compressor pulley bearings are failing, they can make noises, generally a grinding, roaring or squealing noise. I'm getting a whining noise from the front of the motor. Power steering pump noise is one of the most identifiable sounds your car can make when it is broken. -The noise changes frequency with engine RPM's. How do I identify noise which pulley is making noise? (AC COMPRESSOR CLUTCH BEARING SANDEN TRSE07 35MM 48MM 20MM CIVIC) The car made the same noise with or. Hi, it is possible that the compressor needs replacing, however,. While the transmission is the most likely cause, whining while accelerating can also be caused by low power steering fluid or more serious damage like faulty alternator bearings, a malfunctioning water pump, a broken piston or a bad AC compressor. Not only is the belt removed, the pump is scattered all of the work bench. The type of noise may be used to diagnose the nature of the problem. Something may have fallen - or climbed - into it. Ford Explorer owners have reported 24 problems related to engine rattling and whining sounds (under the engine and engine cooling category). In fact, this is one of the most common noises central air conditioners make. Anyway my issue is a whining noise from the aux belt area that gets louder with revs. Start the Car. The car's thermal management system is working to cool off the batteries. The condition may be caused by a faulty A/C compressor regulator valve N280 (Sanden). Automotive Air-conditioning Compressor. It makes it driving, in idle and without the heat or air conditioner on. I can even reproduce the issue at home. It's not gearbox related and not power steering as it does it when not moving and I've been under the car and it's not the power steering pump. Hello all, I am getting a loud whining noise that gets louder as the rpms go upit changes sound to more of a metal on metal sound when you turn ac offso I am thinking it's ac compressordoes anyone have and ideas and how to write up on changing thisif it is the compressor am I able to just put the clutch kit in it or should I change the entire compressorit's just the clutch kit. If the noise goes away, then it may be the engine or clutch assembly that is causing the problem. I took it to the dealer, and they said that I needed a new compressor, and wanted about $1000 to replace it. It is pretty loud and surprising as the car is shutting down, pretty quiet, and then all of a sudden it makes this loud fluttering/grinding/whining noise for about 1. The car was serviced by a Subaru dealer in January and they didn't mention it. Chevrolet Silverado 1999-2006: Common Noises Diagnostic. Still makes the noise a few seconds after the car is turning off. This is usually the sign of an overcharged system, which is only usually an issue when too much Freon is added during an air conditioner service. It's a relatively high-pitch screeching sound but sort of like a whispering mouse. I have been hearing a whining sound that increases and decreases with engine speed. It makes a bad bearing noise changing tone with the rpms. AC Compressor Noise Diagnose and fix AC compressor noise on startup. Ever since i bought the vehicle on a hot day when i turn on the a/c after parking the car in the sun, i start getting a whining noise in the a/c. It's not gearbox related and not power steering as it does it when not moving and I've been under the car and it's not the power steering pump. Click on one to find out more about what makes noise in that part of the car. ok i have an update, the sound gets louder and louder especially when idling, it is coming from the passenger's front side of the car by the drivebelt and pulleys it is a loud whine like a train speeding down a track. The the new Payne noise never quit. On older models there was a separate belt driving the A/C compressor. I'm getting a whining noise from the front of the motor. In addition, loose compressor mounting can cause misalignment of the pulleys. car reviews and news Do not touch. This is one sounds that you rarely notice on ICE cars (due to engine noise). You can try taking the hose off and inspect for tears, holes or cracks in it. Hi all - nice to see a healthy forum! The missus has a 2000 Fabia 1. My Honda dealer replaced the Serpentine Belt and the pulley. A genuine compressor replacement would be over $2,000. Aside from overheating issues, car runs great. The loud noise you hear when you park the car or when you plug in to charge is just the air conditioning compressor running. Not a screeching sound. I understand once the central ac shut down, the compressor tries to equalize the pressure between the low and. How To Fix A Refrigerator Making High Pitched Noise Refrigerators can be noisy (clicking, buzzing, humming, high pitched squeaks) and some sounds are just a normal process of refrigeration. When the compressor is idle I hear loud whine/screetch until the compressor kicks on then the noise stops, but starts whining as soon as the compressor shuts off again. The common causes of air conditioner compressor problems are:. Operationally, here is what happens when you. It's been making a whining noise for a while now, but it got much worse last week. A little Freon loaded cool air was coming out of ac. Loud noise from Alternator/AC compressor area 06 Jetta now with videos (and sound) This morning on my commute I started getting a noise from the engine. How to deal with noise in the air conditioner compressor. Was wondering if any other 2009 Rondo owners can tell what's next to fall apart. The spark plugs can also produce clicking noises on their own if they become loose. I think its mentioned on my thread too. I think its mentioned on my thread too. Hey everyone! First post here in my 2016 Honda Civic Ex-T. We also offer whole home dehumidifiers which will significantly decrease its level as well as lengthen the life of your AC unit! How to fix a squealing AC. It looks like the air conditioner works intermittently. Put gauges on car. Best Answer: Try this trick, grab a screwdriver, place the point of it on the a/c compressor while the car is running, and put your ear up to the handle of the screwdriver. AC Compressor Noise Diagnose and fix AC compressor noise on startup. This noise usually happens when starting the car, when turning the steering wheel, or when turning on the air conditioning. On older models there was a separate belt driving the A/C compressor. Just like any AC, the one in your vehicle is full of chemical refrigerant that is gradually reduced in volume as the compressor operates. My car is making a loud squealing noise and won’t go over 20 miles an hour I just replaced the tensioner and the AC compressor belt is fairly new noise is coming from top of engine AAMCO Colorado on April 2, 2019 at 4:12 pm. Loud noise from Alternator/AC compressor area 06 Jetta now with videos (and sound) This morning on my commute I started getting a noise from the engine. If your car makes noise when accelerating or turning, don't ignore it. My AC compressor is making a terrible squealing noise. There are times, though, where you might hear a squealing noise when you engage the air conditioning system. My AC is making some noises and and was wondering if any of you guys could offer some insight. The second time they decided to replace the AC compressor, since they thought it was the only thing that was tied to both the AC and the engine speed (makes sense). Second and the most pressing issue is that now after the last refill of freon, the compressor makes a fairly loud "whirring" noise when engaged when the rpm is increased beyond idle and gets progressively louder as the rpm is increased. Replace Timing Chain and Oil. Its making a rrrrrrrrrrr noise when accelerating. AC still works fine. I even jacked up my car and turned on the A/C and listened the compressor. My compressor is making a whining noise "only when the rpm goes up" and "only when the AC ison" My engine has only one belt therefore the compressor does not have an independent belt. Any time you hear a cyclical sound from the front of your engine, where the belts are, you should check it out. cooling fine just making very loud noise finally broke the belt compressor maybe?03 tahoe herd compressors was a problem with these. I have a whine when I start the engine it is the same noise if engine is cold or hot. I started hearing a whining noise when the engine was running so I had it checked. air conditioning compressor, and alternator. If the noise goes away, then it may be the engine or clutch assembly that is causing the problem. The the new Payne noise never quit. Was wondering if any other 2009 Rondo owners can tell what's next to fall apart. The ac was still cold, but I continued the drive without ac. Already had to get the whole ac kit replace for $1250. How to Fix Your Car's Air Conditioner. Listen and figure out what it is before you buy anything. It's best to catch problems when they are small to avoid costly and extensive repairs or needing to completely replace your air compressor. almost a whine that can be heard with the AC on, especially noticeable when accelerating, then I know what you are talking. The fan at all speeds is quiet if the AC is off. The noise from an air conditioning unit can have lots of causes depending on the type of unit. The loud noise you hear when you park the car or when you plug in to charge is just the air conditioning compressor running. The car has 50,000 miles and I suspect it is the alternator but wonder if other have had this problem? Thanks in advance for any reply. If you have a leak, the whine may stop for a while, but once the fluid leaks out again, the whining noise will resume. This has never happened previously until the system was repaired and recharged this time. I believe the fan clutch needs replaced because air conditioning has started getting warmer at idle but am trying to diagnose the squealing sound that sometimes happens when the air conditioning is turned on. Not too bad - barely noticeable at idle - but getting louder with increasing RPM's. Get a real long blade screwdriver and use it to listen to the alt, ps pump, ac pump An ear on the end of the handle and the tip on whatever you want to listen to. After some hissing and other noises typical to a compressor starting up, it looks like the compressor disengages after about 30 seconds. Operationally, here is what happens when you. We have all experienced when an air conditioner kicks on and off in a house. As for the whining noise, might be a crack in the intake hose. This, however, is not a permanent fix and the problem should be tended to by an AC repair. The situation : A high-pitched hissing or screaming sound. I have taken the car 4 times so far to Lexus Santamonica (which is where i purchased my car to start with) and the last time i even complained to the LEXUS head office to get this problem fixed. Sound measurements were taken both near-field (within 5′ of the compressors) and far-field (30′ away at the assembly area). Can low refrigerant cause the AC compressor to make noise? Best Answer: Yes the compressor oil will leak out with the Freon and you could be low on oil in the system. 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. After some hissing and other noises typical to a compressor starting up, it looks like the compressor disengages after about 30 seconds. How To Fix A Refrigerator Making High Pitched Noise Refrigerators can be noisy (clicking, buzzing, humming, high pitched squeaks) and some sounds are just a normal process of refrigeration. The the new Payne noise never quit. Even though this video is on an Acura the information will translate to other vehicles as well. I was told that the noise that I hear from the engine is a bad AC Compressor. I'm getting a whining noise from the front of the motor. Re: noise/whine after AC service, concern? My theory* is that when it is very cold, the metal in the fan contracts just enough to cause some contact between the reciprocating parts. I also spun the AC compressor pulley and noticed and felt a gravely sound after I pulled the belt off. Can you tell me if the whine of the air conditoner can be fixed? This happens -once in a while- after I turn off the ignition. Contact Hydes whenever your air conditioner is making noise. And to give you a few ideas on what could be wrong with your car, here is a list of some common car AC problems and. In the soundfile attached the car is in P. Occurs at the outside air conditioning unit when the AC first turns on. It doesn't sound like the belt, really. Other possible sources of a whining noise can be the a/c compressor. If you turn on the AC and immediately hear a rattling noise, there are a few potential causes: Compressor: If your AC compressor is beginning to fail, it can make a rattling noise. Is it really loud? This is to narrow down and confirm the whining is from the compressor. I saw one old posting when searching that reported similar noise when the AC was disengaged, and that was due to insufficient belt tension. The sound comes and goes while the AC is on, most of the time I don't hear it. If the sound continues, hire a heating and air conditioning professional to check it out. Once you start noticing a squealing noise during the compressor ON cycle, then it's time to take a look at possible causes. At what speed(s)? For how long? Do the noise change depending on the position of your gas pedal? How loud is the noise? Can you hear it when you are parked and pushing your gas pedal down?. bmw x3 air conditioning compressor my air conditioning question 2005 x3 - air conditioning only cool on drivers side ac air is not cool when temperatures are high air conditioning stopped working can a raised idle cause any damage mixed up windshield. It's a relatively high-pitch screeching sound but sort of like a whispering mouse. The dealer confirmed that it is in fact the AC compressor making the noise. Best Answer: Try this trick, grab a screwdriver, place the point of it on the a/c compressor while the car is running, and put your ear up to the handle of the screwdriver. There are times, though, where you might hear a squealing noise when you engage the air conditioning system. Although this hissing noise does sound like a bad noise it is actually a good air conditioning noise. If the noise is internal to the compressor pump itself, meaning some internal pump part is failing, this can cause serious damage to other AC components in the car by sending debris through the refrigerant circuit. Whine To isolate the noise. My first thought was a tranny pump whine but when the AC is off it doesn't whine so guess it is the AC compressor. From what I've read on this issue, it is possibly the compressor. 2010 FWD LT1-Gold Mist Metallic- seats 8. Is it just a bad clutch on the compressor? is it fixable or does it need to be replaced. Is this just the compressor cycling on. Miata Noises, Squeaks, & Sounds. My initial fear was that the noise was coming from the transmission, as it sounds like a whine that increases and desreases with engine revs, however, I realised that it stopped when I turned the A/C off. If I set the controls to manual, heat or air the noise is not present. This just leaves the compressor as the culprit. The noise was definitely a bearing sound. 3L w/ a lower mount Delphi compressor (H6). The car has 112,000 miles on it and has had regular oil changes every 4,000 to 5,000 miles. When air is on it makes a load whining noise? Bad bearing in compressor? Since both when heating or cooling your car the air conditioner compressor is working the fan will be running at high. Re: Buzzing sound when the AC is ON.