Car Aircon Hissing Sound















ran car for a few miles, seems like temps are colder but when I turned off the car I hear a hissing sound for about 10 seconds coming from the area near the ac lines. is this a normal winding down process for the air con or could i have a leak. Air conditioning can be used in both domestic and commercial environments. If you can hear your air conditioner running but it isn't blowing air into the room, there may be a problem with its fan motor. If the window is a triple-track type with a screen panel included, remove the screen completely before installation. Alternatively, the hissing sound could just mean that the engine is overheating. This should be taken care of by Jerry Kelly as soon as possible, because it will force your air conditioner to operate inefficiently and is bad for the environment. 5% increase in battery range in hot weather. Hi Guys Over the last few days I have noticed a strange whooshing noise when accelerating , it only kicks in once the revs get over 2. The hiss is similar to the sound when airing down a tire only it is softer in volume. You will need to scroll down and search the link for the information you need to read or discuss. And of cause when I switch the AC off the noise goes away. It had a hissing sound coming from the center vent when turned on. Below are the problems I am having. Also, I noticed that it only makes this sound when it is really cold outside, being a heat pump the condenser probably gets really cold. If you hear a hissing or bubbling noise around your inside or outside AC, that likely means your central air conditioner has a refrigerant leak. But I will tell you that on my 09 Enclave, both the front and rear evaporators had to be replaced as they both developed leaks. Do a little troubleshooting to keep the AC system in your Suzuki Vitara running smoothly this summer. There are different levels of hissing, as we'll explain here, but the bottom line is that hissing isn't a sound you want to ignore, especially with summer just around the corner. Darndest thing. Air conditioner/compressor has failed and the unit is leaking freon inside the car cabin when air conditioning or vents are open. Regardless, if you hear a hissing noise under the hood, get out of your car and look underneath it. I turned my car back on and noticed I could hear it a bit in the car as well. No matter what the source is, that noise is distracting. If you hear a hissing or bubbling noise around your inside or outside AC, that likely means your central air conditioner has a refrigerant leak. Hello everyone I got in the car last night and switch on the aircon which has been working fine I turned on the blower without the aircon and it was fine then when I switched on the aircon it started making a hissing noise and then I noticed it wasn't getting cold. It almost sounds as if something is "caught" or is dragging on some rotating object. As far as I know they are all in the public domain. i have checked the usually informative saab central website and found no answers. You should also check for any loose hose clamps, but make sure the engine is cool to the touch to avoid any injuries. I did not get to spend a lot of time with the car as we had a beautiful weekend here and I wanted to spend it doing other outside projects. A window unit typically has two motors – the fan motor and the. my black ground does nothing. Home Audio Speakers are now available. Remember back to your basic physics and. Book & Save on Packages, Hotels, Flights, Cars, Cruises & more Today!. The booster uses a rubber diaphragm and a push rod. WHY is my HIGH quality car sound system HISSING AT ME ALREADY!? I recently had my stereo completely redone by a place called automatt in hicksville ny which i must say does very high quality work. to make or emit a sharp sound like that of the letter s prolonged, as a snake does, or as steam does when forced under pressure through a small opening. Dealer believes it the opening/closing of a vacuum door, but has unable to correct in 4 visits which includes 2 tsbs (10/98 & 6/99). Take it to an aircon specialist and get them to pressure test it (preferably a nitrogen test). If the cause of your tinnitus is unknown or cannot be treated, your GP or specialist may refer you for a type of talking therapy. Just plug in your vehicle information below and the Pioneer FitGuide will show you a listing of car audio products that should fit your specific vehicle. Remember back to your basic physics and. Re: Hissing sound from aircon No bro. If you hear a hissing or bubbling sound, it’s most likely because your AC has a refrigerant leak. Then, I attempted to turn on the air conditioner on in the car last week and again – very bad squelching noise coming from the car when the AC was on. There's probably high pressure building up in your system, causing the. This could be hissing or background noise like the sound of the wind or a loud air conditioning unit, or even someone inadvertently breathing into a microphone. 5 2003 sorento went in for an mot on Monday, it drove perfect but when I picked it up and drove over 35 then let off the accelerator the car woukd make a huge knocking sound. Thought I could hear some strange noises while driving about but just thought it was a lorry etc. Air conditioner/compressor has failed and the unit is leaking freon inside the car cabin when air conditioning or vents are open. I was a Chrysler tech and this seemed to be true for even brand new vehicles, as they used expansion valve A/C systems. See also the notes below under Vacuum Check Valves. Seems like it is in between the pulleys and the firewall. It sounds more like a electric noise instead of the noise from valve. On many vehicles, you simply pump the primer’s handle to get the fuel moving, and then you turn the air-bleed screw until a hissing noise tells you that the air is escaping. some dissapear into the fabric as soon as i try to pluck them. Most of the radiators heat up at close to the same time. Problems that need an AC professional Here are a few more complicated causes that your AC is blowing warm air that will also require a professional’s help. Some cars have a shut off feature that will disengage the a/c compressor if your engine is under duress. CarComplaints. The car has since had a service at a Skoda garage and they confirmed that the system has lost all of its gas. When the car AC system is running there is a high side and a low side that is divided by either an expansion valve or an orifice tube. A lot can be learned by listening to your engine, so if your car starts to change its tune, you should take heed. Related Articles. When they fail you then may very well hear the sound made by high pressure hissing from air, steam, or fluid being forced out or in depending on the hose and part of your car it services. The sound can be continuous, pulsating or intermittent. Take it to an aircon specialist and get them to pressure test it (preferably a nitrogen test). Then adjust overall volume. Gonna bring the car back in a week and put a black light under the hood to check for small leak, if detectable. com wrote: > I have a 97 Accord with a bit over 200K. The serpentine belt is a belt used to drive your automobile’s power steering pump, alternator, water pump and air conditioning compressor. 5 V6 T REG (1999) i keep thinking that maybe i got water in the exhaust when i was using the jet was at the garage when i was cleaning it BUT WOULD WATER GETING IN THE EXHAUST FROM A JET SPRAY CAUSE THE HISSING NOISE. - what do you call the thing that holds arrows. As far as the smell being more noticeable when the AC is off, I have a couple of thoughts from personal experience. It's a loud buzzing noise. I suggest that you do as I have done, just use them. Wheezing most often comes from the small breathing tubes (bronchial tubes) deep in the lungs. This vital component is what sends the refrigerant through the air conditioner's lines and allows for heat exchange. This part is known for rusting, which results in it becoming loose and rattling against the exhaust. Just follow me and try not to confuse the hissing sound with the squealing or squeaking sound. 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. The length, shape and chamber design of the resonator is designed to silence certain sound frequencies in the exhaust. It is making a strange intermitant hissing noise. High Head Pressure - This can be caused by dirty condenser coils, a bad condenser fan motor, a recirculation of air back into the coils, improper rotation of the condenser fan, non-condensibles (air, nitrogen or other gas), and an overcharge of the refrigeration system. The temperature of the adapter also may feel warm to the touch. Why are your car AC lines freezing up, and what you can do about it? Usually, AC is one of those forgotten systems that you never really think about until it stops working. Over the past week I have noticed when turning on the A/C or defroster it would make a slight hissing sound for the first few seconds. The solution could be a simple one, but it could also require a complex repair that would be risky to attempt at home. If your unit has adequate ventilation and continues to overheat and shut off, you need the assistance of an experienced AC contractor. I've went on youtube and watched several videos of MK-V's and don't hear the hissing I'm referring to on those cars. ac was not too cold, hooked up the recharge unit and adjusted for outside temp 85 degrees, said pressure should be between 45-55psi, emptied can and pressure was about 45psi. It sounds like fluids shifting around and bubbleing. Sent down my car to a workshop also doesn't help. The hissing is part of the operation of the air conditioner. If your air conditioner is noisy, AC technicians recommend checking the quality of the noise first before identifying the source. Madagascar hissing cockroaches are one of many fascinating animal species to hail from the island of Madagascar. Its a new car bought in march 2008 (09 model) these past few weeks in the morning when I start the car I hear noise coming from the engine. Really loud. Anyone having issues with their air-conditioning? Mine has been in the shop 5 times, everything possible has been changed and the air continues to stop working. What's causing the hissing noise coming from my air conditioner? 2 Answers. It is making a strange intermitant hissing noise. Hissing Sound. unsettling noise, just turn your radio up until it disappears Life Hack: If your car is making an @comfysweaters FM/AM CD/USB VOL PUSH SELECT REAR A/C from Imgur tagged as Life Meme. When you hear a hissing noise coming from your vehicle, there is a simple car speaker repair trick you could use to solve the problem. Just like your car, when your AC unit makes a loud, strange sound, it's wise to call an HVAC professional as soon as possible. Here are a few possible explanations behind the hissing sound in your AC system. Usually lasts 10-15 seconds before stopping. This momentary reversal of direction of the scrolls has no effect on the compressor durability and is entirely normal. What you have explained sounds like a system that needs a little gas. Making *hissing* sound when on. The noise is a common problem, with Mercedes Benz E-Class, S-Class, C-Class and ML-Class and it is most noticeable when you first start up the car. It makes a hissing noise when it shuts off sometimes. These amplifiers can be rebuilt, but Corvette Specialist. It's how the AC works. Antique Original - $165. com wrote: > I have a 97 Accord with a bit over 200K. Just picked up car and A/C is working great. 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. Refrigerant, a heat transfer fluid, is stored in thin, copper tubing that runs throughout the entire AC system. 65 lbs of refrigerant placed into system. » Review Causes of Hissing in ears: Causes | Symptom Checker ». If your air conditioner is making a hissing noise or a bubbling sound, it can be rather worrying. Air conditioning problems. Refrigerant (what most homeowners call Freon, the DuPont brand name of refrigerant) is necessary for your central air conditioner to cool your home. slowly the coolent might have reduced and. This could be coming from the compressor or from one of the connections for the refrigerant lines. I turned off air and radio and noticed it was only when I pressed the brake pedal (didn't matter if I was stopped or moving). These noises can occur when there is an abnormality in the combustion flow. There are various situations which can create power steering noise. I recently took my car in after months of trying to find a radio braket after an attempted car boost at 2am in my yard. It's like a 5 second intake sound, then a pause, then repeat. Although they are in a state of panic, I know right away it's not a boa constrictor, rattle snake, or any other animal making that noise. These are the conditions which cause the whistle, and I am able to replicate each time:. The hissing would. It is like air being blown out (think tire that has hole). Also see one of the best simplified diagrams for automotive air conditioning. Fan is set on the lower 2 levels. Some symptoms that may indicate the amplifier is bad include a hissing noise or a sound out of the speaker that’s barely discernable. I drive a 2011 Hyundai Sonata. Vacuum leaks often produce an audible hissing noise created by air being drawn through the failed hose. Expand your Outlook. An air conditioner is a large machine with a great many moving parts - there will always be some noise involved. Hi, My 04 C230 (35,600 miles) has the ability to have the drivers side a different temp then the passenger side. Took a long road trip. Madagascar hissing cockroaches are one of many fascinating animal species to hail from the island of Madagascar. Hello and good day everybody! Since a few days ago I discovered that the airco in my Fabia 1. When I turn it on, it doesn't blow cool air at all and it starts making hissing noises. When you need to take your conversations on the road, choose Jabra’s range of Bluetooth car speakerphones. I took the car in yesterday and everything does work when charged but there is a leak. He will probably find out why your car is unhappy and hissing at you. Car in question is a 2007 Nissan Altima 2. A whining noise from the front of your car: A steady whine from the front of your car could be caused your power steering fluid being low. Gonna bring the car back in a week and put a black light under the hood to check for small leak, if detectable. Its a new car bought in march 2008 (09 model) these past few weeks in the morning when I start the car I hear noise coming from the engine. That helps ensure there's maximum signal to the (sadly, generally fixed) amount of background noise. While this can be caused by a bad bulb or starter (if you have extras, you should try replacing those first to see if the buzzing stops), it’s usually caused by an aging ballast (the device used to regulate voltage for a fluorescent lamp). It is a sound that can be a buzzing, ringing, hissing or other noise. On my 2003 Kia Sedona minivan, the air conditioning recently stopped working. It's both annoying and scary. Twice they replaced the dash controls. Remember back to your basic physics and. The air in the car is colder but not great, I have switched the vents to fresh and recirculation and the noise is still there. Fixing cars and stuff 199,791 views. If you hear a strange sound, pay attention and react accordingly. 2009 Hyundai Azera, automatic, power windows/locks/seats, air conditioning, cruise/tilt wheel, heated seats, leather, roof, steering controls, aluminum wheels. If you detect this noise, have the compressor checked as soon as possible since it could mean that refrigerant is being released to the. I've tried searching the forums for this particular issue with no luck. If you hear a hissing noise from the brake pedal area, it means that the brake booster is failing. Here are a few possible explanations behind the hissing sound in your AC system. Have a friend adjust the settings on the vehicle's radio as you listen to each speaker to locate the one that is having the issue. Automotive AC can be one dangerous system to work on. When a car stereo seems to turn on but produces no sound: The problem is often in the speaker wiring. This information will help us diagnose your car's problem and get your car to feeling better. The nsx has a facotry amplified bose sound system. Unlike home audio systems, car audio systems have many sources of noise to deal with. These two separate sides of the system are necessary for proper operation. Also see one of the best simplified diagrams for automotive air conditioning. When you hear a buzzing noise from your AC, you could be experiencing one of the following issues:. Most likely cause: Your compressor. Any new hissing, groaning, whistling, or other nusiance sounds should be investigated right away. Engine Stalling. A: This is a common problem acknowledged by Honda, and the noise you hear is a faulty Variable Valve Timing actuator, which is a part inside the engine. If you hear a hissing or bubbling noise around your inside or outside AC, that likely means your central air conditioner has a refrigerant leak. However, this need not be the case always as is demonstrated below. I did not get to spend a lot of time with the car as we had a beautiful weekend here and I wanted to spend it doing other outside projects. CarComplaints. These common car noises can spell trouble and cost a lot of money, especially if ignored. The vacuum booster uses engine vacuum to increase braking power. ok, So my ac line is not clogged. High Pitched Chatter Today’s high efficiency compressors may have a high pitched chatter during the cooling cycle. Unable to find the bracket I was reassured by extremely polite staff at savoy aircon and sound who then fixed my radio an customized a bracket to fit all under an hour , with an extremely neat an professional finish an without burning a hole in my pocket. We will not outline all of the reasons your AC unit may be hissing. Chances are you need one of the repairs found in the explanations behind these 5 car sounds. But some air con compressor noises indicate a serious problem that requires a qualified professional. My 2012 Mazda 2 has an annoying hissing sound coming from the air-conditioning. So I went and put a can in it and when I disconnected I could hear a small hissing sound. The temperature of the adapter also may feel warm to the touch. When I turn it on, it doesn't blow cool air at all and it starts making hissing noises. AC Power adapters do emit high-frequency sounds (15 kHz-20 kHz) that may be misunderstood as hissing or crackling noise. But if I put it on Max AC or turn it Off, it makes a hissing noise. While some of the problems above might be minor at first, they can turn into much bigger issues the longer you ignore them. What fits your ride? Configure a Pioneer audio sound system that fits your vehicle. It's how the AC works. My Honda dealer replaced the Serpentine Belt and the pulley. If your car produces a hissing noise when it's on — especially when it's idling — you may be facing a vacuum leak, meaning a vacuum line may be damaged, according to car and motorcycle enthusiast Matt Bochnak. His 2016 album "Songs. The noise is audible from 3' away when the heat pump is cooling in marginal air conditioning weather. Im not sure if all that ice was prevent air from flowomg. 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. Sounds that fall outside of this small circle can be considered abnormal. The best setting for diagnosis is “fresh air” (not recirculated) with the air blowing out of the center vents in the dash and the AC turned on. The hiss is intermittent and seems to occur mostly at red lights and at low speeds. My 2012 Mazda 2 has an annoying hissing sound coming from the air-conditioning. You will need to scroll down and search the link for the information you need to read or discuss. Its repeated every 2-3 mins. When your car's air conditioner isn't cooling anymore — or worse, blowing hot air — it can make for an uncomfortable ride on a warm day. Related Articles. Car Audio Noise Troubleshooting. There is hissing noise constantly that sounds like a valve opening and closing slowly, dont know if this is the cause but something is wrong. A harsh grinding noise often indicates trouble in the compressor. Fixing cars and stuff 199,791 views. Usually lasts 10-15 seconds before stopping. Noise in the air conditioner compressor – What does it mean? The first question you need to ask when attempting to diagnose noise in your air conditioner compressor is “Where is the noise coming from?” Listen carefully to your air conditioner and try to determine its source. Went inside my car and feel no cold air but warm air, also now i hear a hissing sound. In fact, a hissing sound normally means you have a substantial leak. My Cart Items. We'll talk about some problems this can cause and what your options are. Be sure the air conditioner has been securely and correctly installed according to the. Car running cold during highway and stationery, But once car move off from stationery car make hissing sound and air con not cold. Learn how they work together to remove the heat from your automobile. The entire process is powered by your engine's drive belt (or belts). Search for Car Air Conditioning and other automotive services near you on Yell. After I changed my son's cabin filter, his made a similar noise for a while, then whatever it was broke off and now the sound is almost gone. It sounds more like a electric noise instead of the noise from valve. 2008 Lexus 460L Executive model, stopped blowing cold air suddenly earlier today. Madagascar hissing cockroaches are one of many fascinating animal species to hail from the island of Madagascar. Find your quick start headlight bulb now! Highlighting a comprehensive catalog of quick start headlight bulb available on sale this week. If your steering wheel is making a loud rubbing noise when turning, the culprit could be the upper bearing on the steering column itself. The sound stopped when the AC was turned off. Car in question is a 2007 Nissan Altima 2. Squeak/Squeal When You Press Car Brake. The temperature of the adapter also may feel warm to the touch. These amplifiers can be rebuilt, but Corvette Specialist. It just so happened that the radiator was leaking as well at the seal. Noticing a very LOUD hissing sound on my 2012 Traverse LTZ with HVAC set to auto, both temp settings at 72-degree, AC button on, rear button on, and NOT recirculating. Reason #2: Internal Valve Leak. I got a new hose, and some form of seal conditioner was put into the system by the aircon technician). This, however, is not a permanent fix and the problem should be tended to by an AC repair. The AC used to be excellent in defrost mode but a few months ago I would hear a hissing sound inside the vehicle when the AC was on and now the only way to clear the fog from inside the windows on a cool wet day is to run the manual defrost at the highest fan speed and wait a few minutes for the heat and airflow to clear the inside of the windshield. It never really cooled well anyhow, I just thought that is the way that car's AC worked. Sometimes these kinds of leaks can also be accompanied by a bubbling sound for the same reason. Find your quick start headlight bulb now! Highlighting a comprehensive catalog of quick start headlight bulb available on sale this week. Mine was doing this all winter, using the ac when in defrost to dehumidify, and when it got warm again I tried using the AC only to find that it was blowing warm air I bought a can of AC pro and dumped nearly the entire thing in and it stopped hissing, both front and rear AC work beautifully, and I haven't had any problems with it since. The aircon seems to work fine, but as I stops the car at the traffic, it doesn't get any colder it. Hissing in ears: Hissing in ears refers to a condition in which an unusual humming or buzzing-type noise is heard without a source for the sound. Turned on the A/C and the car stuttered a little bit which is normal, you could tell that the i had turned on the A/C. Be sure the air conditioner has been securely and correctly installed according to the. Well once i got enough courage to start my car back up it seemed to run fine. "Worked Like a Champ!" Used this to fill a new A-C system. I have done various fluid checks and it is not losing water. So the hissing noise was still there when I went out to check again. A different sound may be produced depending on the outdoor temperature or humidity. Connecting the vacuum hose to the heater valve cured the hissing sound, and shut off the flow of coolant through the heater core. A full tune up service with the auto repair technicians at either of Paul Campanella’s two car repair shops in Wilmington, DE can check and replenish all of your vehicle’s fluids. If the air conditioner is to be installed in a window, you will probably want to clean both sides of the glass first. Under certain conditions, the air filter may get sucked up against the top of the duct box. White Noise is invaluable — I’ve had a thunderstorm in my head for days now, blocking out all the footstep. I love this app — I have one tweak request, though I work from home, as does my wife. Most are older. 2009 Hyundai Azera, automatic, power windows/locks/seats, air conditioning, cruise/tilt wheel, heated seats, leather, roof, steering controls, aluminum wheels. I turned off air and radio and noticed it was only when I pressed the brake pedal (didn't matter if I was stopped or moving). To find a vacuum leak, start your car and listen for a hissing sound, which may indicate a leak in your engine hoses. But when your air conditioner starts to get noisy or louder than usual, it is almost definitely a sign that something is wrong. Why Is My Central Air Conditioner Making Noise? Link below are common central air conditioner noise problems we received from visitors to central air conditioner and refrigeration cycle. If you are hearing a hissing when people are talking, particularly at the end of words, the hissing may actually be speech sounds. It is perceived as a sound near the head or within one or both ears. my black ground does nothing. See detailed information below for a list of 16 causes of Hissing in ears, Symptom Checker, including diseases and drug side effect causes. Air conditioning (often referred to as AC, A/C, or air con) is the process of removing heat and moisture from the interior of an occupied space to improve the comfort of occupants. Automotive AC can be one dangerous system to work on. The car’s total specifications and physical condition is mentioned and described below in the following points:- • Every function and every electronic is completely working • Original registration book, file, both number plates available • Manual gear transmission. Over 50,000 Brand New Auto Air Con Parts available. My Cart Items. Late last summer, upon starting up my car, I noticed a hissing noise coming from the center panel on the dashboard. It is very normal for an automotive system to loose air-con gas as the rubber hoses and couplings leak very very slowly. get home park car, sit in drivers seat, and can hear like a hissing likely from around behind the dash where the heater unit is ive been driving alot with air con on lately, air con works fine, but am guessing im only noticing such noise because i have been using it. AutoAnything is America's leading Truck Accessories and Auto Accessories site with In-House Experts ready to help you with all your Auto and Truck parts needs. It’s important not to panic. It had been used for Christmas lights. com : Car complaints, car problems and defect information. Bought a new G70 3. Fixing cars and stuff 199,791 views. if you hear the hissing sound at the driver side, it might be your brake vacuum booster that is leaking and adding false air (unmetered air into the intake manifold that was undetected by the airflow meter or MAP sensor or the MAF sensor). Matter of fact it runs out very fast under the car when the ac is on. AC Repairs | 3 Potential Reasons Behind The Hissing Noise From Your AC 11 July 2016 by Eva Fisher. Also, I can't really determine if the A/C compressor is even cyclingit doesn't sound like it is. The steering wheel started to making some strange noise, which I was told by dealer that would cost me more than $1000 to repair. It would go on and off and its getting louder. Unable to find the bracket I was reassured by extremely polite staff at savoy aircon and sound who then fixed my radio an customized a bracket to fit all under an hour , with an extremely neat an professional finish an without burning a hole in my pocket. The trnsformation either way could be hindering. Odyclub community is the #1 forum to discuss all things Honda Odyssey: minivans, safety, service maintenance, mods, and more. It had been used for Christmas lights. Listening to your car can help you troubleshoot problems. we stayed 2 times in the vien dong hotel! both time we had a room on the street! was very noisy all night long! specially when you get a suite and you do not sleep because of horns! the room are ok! clean! the breakfast is a big buffet with plenty of foods!. Air conditioning problems. Diagnosing Power Steering Noise. What would cause a car to shut off then a make hissing noise? If it it shutting off because of the hissing, it is likely moisture getting at electronic parts and shorting them. If the tensioner fails, the accessory belt may snap, causing the power steering, alternator and water pump to stop working. Found out the front Evap coil was bad. For a couple of weeks it was excellent, but earlier this week I noticed it hasn't been as cold, then in the past 2 days a nearly constant hissing noise is coming from the centre dash vents. Obviously something isn't right with it, and I know I need to get it looked at. Your AC unit should not make a hissing noise. So if there’s a large refrigerant leak, you’ll hear a hissing or bubbling noise (almost like the sound when squeezing a balloon that has a hole in it). Noise in the air conditioner compressor - What does it mean? The first question you need to ask when attempting to diagnose noise in your air conditioner compressor is "Where is the noise coming from?" Listen carefully to your air conditioner and try to determine its source. A few weeks back the weather got warm enough to run the A/C. It just went purrrrrrrr-renttttttt. A loud blowing sound could be nothing, but a constant roar could be a problem. Around 2,000 miles, it began. Why Your AC Makes a Hissing Noise. I drive a 2011 Hyundai Sonata. You can identify a leak by listening for a hissing sound in your air conditioning system. Anyone having issues with their air-conditioning? Mine has been in the shop 5 times, everything possible has been changed and the air continues to stop working. While the minimum level is determined by the overall background noise. Why is my air conditioner making a grinding noise? The first thing you should do if your air conditioner is making a grinding noise is switch the unit to off at the thermostat. however the annoying hissing sound returned and slowly but surely the air con stopped working. A-Professional Heating and Air Conditioning is available 24 hours a day to bring you the skilled work that will keep your AC cooling your home all summer long. Feeling Problem of Low Cooling or Noise from Car AC System. When the air conditioner in your 2008 Buick Enclave starts blowing hot air, you likely have a freon leak. When the hissing stopped, air was cold. Something hit the condenser on the road and put a hole in the ac condenser. To check operation of the valve, pull off the hose from the valve (this will require a bit of patience and grunting.