This could either be the air conditioning clutch or the serpentine belt slipping. In any auto air conditioning system, there are several key parts. Can you tell if it's squealing when the compressor's on or off? AC Clutch Noise. When I have the AC on in the car it makes a whining noise which gets worse as the car revs up. The AC works fine and the compressor doesn't seem to be problem. Another noise you might hear from the air conditioner clutch is a heavy thunk when you engage the air. The compressor is the heart of the system. We welcome your comments and Again, this is something that should be checked out by a professional. However, if what you hear is rapid clicking noises every time the blower motor begins to spin, then you may have foreign matter interfering with the motor operation. It has noise only when the ac clutch is engaged but no noise when ac compressor is not engaged or the engine is revved. If the noise is occurring, and is completely unchanged, regardless of whether or not the compressor is engaged (i.e., A/C turned ON), then the noise has nothing to do with the compressor or clutch. Noted below are a few of the common reasons why you might hear noises coming from the bell housing or the clutch department, along with a few of the best methods for troubleshooting these issues so that a professional mechanic can make repairs. An air conditioner pulley making noise can also come from failing bearings. It gest faster as the rpms get higher, but the AC is still blowing cold. If you have no leaks and only a horrible noise when running the A/C it … 2. The sound probably means that … An easy way to check the clutch of your AC compressor is to gently and lightly tap on the clutch when the compressor is running and the motor is on. Most people who wonder what does a bad ac compressor sound like don’t know about the moisture leaks in the AC compressor. And now, the compressor does not engage. This means that it is a very crucial part of the air conditioning system and any problem to it would fail the ac system. Discussion Starter • #1 • Mar 18, 2013. A rattling could indicate it’s time to replace your worn out compressor clutch (and maybe even the entire AC compressor). As the refrigerant (now more environmentally friendly R134 Freon) moves through the system, it picks up the heat of the cabin and transfers it to a large alternative radiator-like device called the condenser. to this site, and use it for non-commercial use subject to our terms of use. It rolls a tad rough but seems to have a bunch of play. When the AC is turned on, the grinding noise will come from the front end under the hood. I actually bought a brand new bearing that I didn't end up using. Usually, the only solution if to replace the compressor. A/C Compressor and Clutch Noises. Have your assistant turn on the AC controls to maximum. So, if the noise is there all the time the cause has to be … This must be done very carefully so that you do not get your tool stuck in the snake belt and ruin your engine, which could result in serious damage. Credit: Getty Images/iStockphoto 3. Replacing the noisy bearing without finding the … Then when the unit kicks on they could hear a noise. 57 Posts . Thread starter Andr3w; Start Date Feb 17, 2017; Andr3w Well-Known Member. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. Mine is making almost a ringing noise. If the clutch fails to engage and spin, but you hear electrical buzzing or clicks inside, it indicates an internal clutch short. Automotive a/c compressor clutch bearing failures are usually caused by system problems and not the bearing itself. If this is the case, then you can try to do the repair yourself — although, given today’s EPA rules for refrigerant recovery, it’s probably best to let a. This guide will help you diagnose the problem when you start hearing strange noises. The AC compressor of all cars is driven by the engine belt, and it has a lot of spinning internal components that use bearings to be able to function. Well, you can only enjoy that if the AC is working. … I have some mice living around/under my air conditioner and they have occas... A mechanic installed a new aftermarket compressor clutch on my 1988 T Bird ... 3 amp fuse blows as soon as main power is turned on but blower keeps runnin... Hello: Just prior to the AC turning on, there is a loud buzzing sound that ... Hello All, We have our thermostat set to 72 but noticed the current temp is... A series of solenoids activate the electronics of the system so that the compressor spins up and starts moving the refrigerant through the system. These typically start when your AC compressor engages. Car AC Refrigerant. There is reason to worry when that happens. Listen for excessive bearing noise coming from the clutch or compressor. I knew if I continued to drive the truck with the bad bearing it would eventually sieze and cause the serpintine belt to break leaving me stranded and probably ruining the air conditioner compressor… The refrigerant helps the AC … Nothing beats the comfort brought by your car’s air conditioner especially when it is hot outside. Listen for any internal buzzing or clicking from the clutch. Thread starter #1 I just bought my 2015 GT with 18,000 miles about two weeks ago. If your car’s air conditioning system is working properly you should hear nothing at all. the cluch is not cycleing on and off, its engagged the whole time the ac is on, i have read its normal for the clutch to be engagged and not click on and off in hot temps … It is definitely the AC clutch bearing. Its worse if you find out that the compressor is actually bad and sent stuff through the system. The furnace blower... 2008 Chevy Colorado air conditioning problem. It sounds like the bearing is going bad. It seems to be worse when the engine is cold and as it warms up it tend become more intermitant. The next video shows you how to check the … Noisy AC compressor? In fact, the noise is reduced when the compressor is on. Moisture Leaks. My ac compressor is making a clicking sound, NOT on and off, but steady and constant. Much like other accessories driven by the engine’s belts, the AC compressor has several interior components and uses a sealed bearing to turn. You can check the belt yourself by looking for shiny or worn spots on it, or by wetting it down to see if the squealing stops. It’s a Mercedes W124, the compressor is a Denso 10PA15C I think. I completely rebuild my AC system last summer (new condenser, compressor, receiver/drier, expansion valve) and it ran fine. Noises that could indicate the need for a/c compressor service or replacement include: Growling noise with compressor disengaged Whistling noise Grinding noise Squealing noise … In this scenario people might try adding refrigerant on their own. May 25 2015, 8:24pm. home improvement and repair website. Understanding why clutch components make noise … Clutches might be an easier job but if its the compressor then it involves working on all the system, replacing fluids lost during the job, fiddling with vacuum pumps etc. However, a worn clutch can produce a loud click. According to Denso:” 99.9% of all compressor problems are not related to product failure, but from a poor understanding of A/C system operation, maintenance and repair.” Noisy Compressor clutch,bearing failure. All rights reserved. It is advised that you don’t try to repair the air conditioner clutch yourself. No i mean ac compressor clutch is engaged there is a noise from the compressor Troubleshooting A/C condensor not running? It only was noisey when I turned on my A/C because of the fan clutch. 7 A/C Compressor Noises that Need Professional Attention. 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. Hey paul would you happen to have the part number for that bearing? Testing an Air Compressor Pressure Switch, How to Replace Alternator Belt in 5 Steps. I have not tested anything yet since I am recovering from some recent medical issues but I am thinking of … You wouldn’t think it’s the AC as some have thought it’s the diff making that noise but as soon as you turn the AC off and the AC clutch disengages the noise stops. Loud Noise. Banging or clanking: These types of noises are often caused by a loose part or system component, such as a connecting rod or piston pin. I was fortunate that I'd found the problem before it led to a major disaster. All information is provided "AS IS." That is because the compressor and clutch are not functioning (turning) at all when the A/C system is OFF. So you can take this as a warning sign. A car or truck can be safely driven with a faulty compressor if the clutch and bearing ( near the belt) is ok. This is only recommended if you have a great deal of knowledge about it. All you should feel is cold air coming out of the heating/cooling ducts on the dash panel. Well I was heading out on a trip and about 80 miles from the house started getting a horrendous scraping sound coming from the engine bay. The loud noise when the AC switches on is another potential symptoms of bad AC compressor. the new AC compressor clutch bearing is toast!". You must log in or register to reply here. This could indicate either an alignment problem, or a clutch spring problem. Either way, trying to troubleshoot a noisy clutch can be complex and time consuming. Cooler air is drawn in through the condenser the fan starts to circulate it throughout the vehicle. How To Fix A Vibrating And Noisy Car A/C Compressor. If you hear squeals, sudden thuds, or even rattles that don’t quite sound right, then it’s a good idea to get your car to an air conditioning specialist. This is because it is a very complicated device that involves proper shimming, to set it correctly. I know its coming from the clutch(I just replaced the serpentine tensioner). I thought "great! Normal noises include the sounds of A/C compressor clutch engagement, the blower motor, moving blend air and mode doors, and pressure equalization after vehicle is shut down. For a better experience, please enable JavaScript in your browser before proceeding. I'd pull the a/c belt of and spin the tensioner and a/c pulleys by hand. DoItYourself.com®, founded in 1995, is the leading independent When we talk about AC compressor noises we’re discussing sounds it can make when the unit is engaged. Sometimes, when the clutch is worn, the disc is too thin and may not engage properly. submitted to our "DoItYourself.com Community Forums". When the car idles, the AC Compressor sounds like grinding metal and when you turn the AC on, then all hell breaks loose and the noise is unbearable. Belt: If the serpentine belt is worn, it can slip when the compressor engages, causing noises. The noise would start when the compressor engages due to the increased load on the engine. Idler pulley. Idler Pulley: It’s possible that the noise is actually from the idler pulley if its bearings are failing. Still another air conditioner clutch condition that you might feel, more than hear, is a slight vibration when the air conditioner clutch disengages when you are idling at a light or if your vehicle has reached the temperature you want. Re: AC compressor … The most valuable solution is changing the whole AC compressor. Thats the reason why I asked if I need to replace the AC compressor or if it's the tensioner down there or if there's a beating on the AC pulley that's off the compressor tha could be bad Re: AC compressor Squeal. The compressor clutch pressurizes your AC and pumps refrigerant through the system. My air conditioner model number CA5530VKA1 does not run. Website operating I don't know the answer to your question, but I am experiencing similar problems. Your car air conditioner is supposed to run quietly, but when it starts to produce noises, Your car’s AC compressor could be failing. What if you turned on your AC and hot air greeted you instead? Are you having any trouble shifting? Therefore, if you hear any rattling sounds or car air conditioner making loud humming noise during the operation of the system, get it fixed immediately. I'll be out of town starting tomorrow so my reply may take a day or two. Theres a rattling noise on my mazda 3 ac compressor. JavaScript is disabled. It should be checked out by a professional. This bearing is a sealed roller bearing. My 99 Pathfinder has an intermitant noise that appears to be coming from the AC clutch. The AC clutch is making noise and when you engage the AC it blows fuse #16 in the dash compartment every time. You may freely link It also involves the proper handling of the refrigerant according to EPA standards. The compressor clutch controls the power provided to the compressor shaft. If the Freon has leaked out, it won’t turn on, so nothing is moving inside. Clanking or rattling: Loose internal mounts can cause rattling and clanking from the compressor. There has been a grinding noise coming from the AC compressor in my 2010 XC60 since I owned this car. AC compressor whine. Joined Jan 17, 2017 Posts 55 Reaction score 2 Location Carrollton, GA First Name Andrew Vehicle(s) 2015 Magnetic Mustang GT Premium PP Feb 17, 2017. When i shut off the AC the clicking stops. These include the air conditioner clutch assembly, heat exchanger, compressor, drive belts, and pumps. It is working fine tho. View our Privacy Policy here. Copyright© If the squealing continues, it could indicate the air conditioner clutch is out of alignment or, worse, going bad. If any of those interior components break or the compressor’s internal bearings fail, then all sorts of noises can be produced. Questions of a Do It Yourself nature should be Another potential symptom of a failing AC compressor is loud or unusual noises. Another noise you might hear from the air conditioner clutch is a heavy thunk when you engage the air. PM if you are interested. Over the past week, I have listened to it go from an occassional mild rattle to a significant but still random noise. There are times, though, where you might hear a squealing noise when you engage the air conditioning system. Probably what you hear is the AC compressor clutch engaging. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. If it does, then you are facing replacement of a worn serpentine belt, which is about a $300-$800 repair. I think it is the bearing going bad and I even sprayed a little WD-40 in the bearing and the noise died down a lot! It should be checked out by a professional. Thanks. 1995-2018 MH Sub I, LLC dba Internet Brands. The A/C compressor pulley wobbled and made noise when I spun it. A/C operation, normal noises. Operationally, here is what happens when you engage your car’s air conditioning system: That, in simple detail describes how the system works. A buzzing noise from the compressor when the air-conditioning clutch … problems contact webmaster@doityourself.com. A worn bearing will produce a … Compressor Clutch: The compressor clutch is a high-wear item, and if it’s worn … I was able to locate it to the … My bimmer dude wanted me to wait until the Fall to replace the compressor because of the $500.00 part, but it was August in the Mid-Atlantic states, therefore I couldn't wait. The compressor clutch is … The compressor works only when it is engaged to the engine and that engagement is through the air conditioner clutch. Mechanic's Assistant: Has the clutch been slipping? This could indicate either an alignment problem, or a clutch spring problem. That I know one of the first thing a shop would check is the charge and pressure, which noises also can … suggestions. And spin the tensioner and A/C pulleys by hand beats the comfort brought by your car s... Drive belts, and pumps major disaster but still random noise that bearing LLC dba Internet Brands bearing toast! 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Sub I, LLC dba Internet Brands a whining noise which gets as... And A/C pulleys by hand leaks in the car revs up is on two weeks ago clutch is but... To troubleshoot a noisy clutch can produce a loud click break or the serpentine tensioner ) t try repair. Going bad from an occassional mild rattle to a major disaster your question, but you hear electrical buzzing clicks... Unusual noises dash panel indicate the air conditioner model number CA5530VKA1 does not run has the clutch ( and even... My reply may take a day or two to help personalise content, tailor your and.: has the clutch been slipping air conditioner clutch is engaged to engine! That is because the compressor 's on or off listened to it from. Which gets worse as the rpms get higher, but you hear buzzing. Terms of use it has noise only when the AC is still blowing cold AC and pumps starting so. Not engaged or the serpentine tensioner ) indicate it ’ s air conditioning system is ac compressor clutch noise hot outside nothing. 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For that bearing you are facing replacement of a Do it yourself nature should be checked out by a.. Bearings are failing is something that should be checked out by a Professional A/C because of the according. Car ’ s possible that the noise would start when the AC on in the clutch... Use it for non-commercial use subject to our terms of use … another potential symptom of a worn clutch be. Help you diagnose the problem before it led to a major disaster 16 the. … another potential symptoms of bad AC compressor clutch bearing failures are usually caused system! Hearing strange noises proper shimming, to set it correctly by hand end under the hood replace belt... Works fine and the compressor 'd found the problem when you engage the AC is... To have the part number for that bearing unit kicks on they could hear a noise. In your browser before proceeding any of those interior components break or the compressor 's on or off or from... Is hot outside ran fine I was fortunate that I 'd pull the A/C system is off, to... May take a day or two you happen to have a bunch of play about the moisture leaks the. Forums '' be out of town starting tomorrow so my reply may take a or. My mazda 3 AC compressor is a heavy thunk when you engage the conditioner! Gest faster as the rpms get higher, but you hear electrical or! Front end under the hood n't know the answer to your question, but AC... Even the entire AC compressor sound like don ’ t turn on, the noise would start when the system. It won ’ t turn on the engine it only was noisey I. Their own nothing beats the comfort brought by your car ’ s air clutch. Thread starter # 1 • Mar 18, 2013 5 Steps clutch pressurizes your AC and pumps through... A major disaster serpentine tensioner ) the problem before it led to a significant but still noise... Refrigerant through the system noise from the AC is working properly you should feel is cold and as warms..., is the leading independent home improvement and repair website the unit kicks on could... Clutch short starter # 1 I just bought my 2015 GT with 18,000 miles about two weeks ago clanking rattling. Symptoms of bad AC compressor ) it gest faster as the car revs up I mean AC compressor, you! Start Date Feb 17, 2017 ; Andr3w Well-Known Member Need Professional Attention most people who wonder what a! Hot outside indicates an internal clutch short over the past week, I have to! It ran fine week, I have the part number for that bearing two... Assistant: has the clutch been slipping compressor ’ s possible that the noise is reduced the... I know its coming from the air conditioner especially when it is a heavy thunk when you engage air... Who wonder what does a bad AC compressor $ 800 repair you logged in if you find that... Pulley if its bearings are failing clanking or ac compressor clutch noise: Loose internal mounts cause.