E46 Ac Hissing Noise

AC NOT WORKING PROPERLY AC is not blowing COLD air. I already replaced the puller fan and it still doesnt work. Usually lasts 10-15 seconds before stopping. Get a new, high-efficiency system for one low monthly payment. Ive managed to record a video of the sounds, in the video im revving lightish to give the sucking noise. At some point, you park and turn off your car — only to hear a hissing noise coming from your AC. Last summer, my AC went warm. Before you call the AC repair service, use these AC troubleshooting tips that address common problems, their causes and cures. To me it sounds like air leaving a tire. I checked the high and low pressure with a set of manifold gauges and had to put a can of R134A in to get the compressor clutch to come on. Enjoy!!! Buffalo4. HVAC air conditioner heat pump Hiss Hum Huff Howl Noise FAQs Diagnose Air Conditioner or heat pump Compressor or air handler hissing, huffing, humming Noises, Questions & answers about air conditioning or heat pump system equipment or control or ductwork noises: cause, significance, cure. The hissing sound will be heard from the air conditioner unit located outside the building. So, the frequent hissing noises coming from your thermostat are simply the metallic strips adjusting the air pressure inside those tubes. You will need to have refrigerant and dye added to the system and the hissing will go away. This sounds like a somewhat loud hissing from the dash. The clutch problem you talk about is totally. Leaks along copper refrigerant lines will allow gaseous refrigerant under high pressure to escape. Debris in the outdoor unit will cause a noise outside your house. If you have a bad wheel bearing, it will typically get louder while you're turning and the vehicle's weight starts leaning on that bearing. A hissing noise coming from your HVAC system is not something to be overlooked. You should disconnect the power and call a technician. Many times a friend or customer will ask me to come listen to a strange hissing sound when the automobile is turned off. The hissing noise is a leak in the AC system. This may be the noise you are hearing. i was sitting at the red light and all of a sudden white smoke/steam dont know which started coming from under the hood and there was a hissing sound. Comments: i have a 2002 e46. as well as listen for a clicking sound when the helper turn. Discussion i have a 6. Among the possible causes are leaky refrigerant lines, an internal valve leak or a serious issue with your compressor. Butim not too sure. The air conditioning specialists at DB Heating & Cooling bring years of AC repair experience to every job we do. Recently, the AC started to blow hot air after 10-15 mins of driving. There is a sound that can only be described as a vacuum leak, hiss, air noise coming from the Driver's side compartment in my 2003 5. 11- Sanden PXE14/Delphi CVC comp. I put on one of those parts-store gauges in order to feed dye into the system, and it measured the pressure at around 10psi -- obviously low. Notice: Undefined index: HTTP_REFERER in /home/baeletrica/www/rwmryt/eanq. Recently I noticed a hissing sound coming from the front center vents of the AC when the AC Compressor is on. But something that sounds like a passel of snakes writhing under the hood often leads to a diagnosis of ill health. Hissing/bubbling noise. 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. Fault Diagnosis Over the few years I have owned my car (BMW 318i e46 N42) I have come across a few issues which were down to wear and tear of sensors / consumable parts and also some faults. Best regards. You can get so used to it you don’t even notice it’s on. Among the possible causes are leaky refrigerant lines, an internal valve leak or a serious issue with your compressor. High-efficiency AC units incorporate sound-dampening technology and two-stage (variable speed) compressors to keep noise levels below 55 decibels. Related: Uncomfortable at Home? Your AC May Be Low On Refrigerant. So, if it is over 90 degrees outside and you turn on the AC, the compressor may run on its own to bring up the necessary pressure to cool the cabin. You should disconnect the power and call a technician. 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. They did a vacuum test and past 100%. well the two vents for the driver side only blows out warm air and the two on the passenger side is. Hissing sound coming from heater vents? so everytime I accelerate I can hear a hissing sound coming from the center vents of my volvo 240 (1987). Car Audio Noise Troubleshooting. The problem of a noisy air conditioner condenser can be solved in several possible ways, but if the unit is too old it may just need to be replaced. The fan wasn't on so I thought maybe I received a unit that was defective. Could it be the break booster? I am not sure. I may be paranoid but I can still hear some hissing sound. A faulty exhaust manifold gasket will produce an exhaust leak that will sound like a hissing or tapping sound coming from the engine. ENT specialists treat conditions such as ear infection, hearing loss, dizziness, ringing in the ears (called tinnitus), ear, face, or neck pain, and more. There's never a good time to discover your air conditioner is malfunctioning. Refrigerant (what most homeowners call Freon, the DuPont brand name of refrigerant) is necessary for your central air conditioner to cool your home. Check out our crackling noise guide for more information. Hello, You Need a New Compressor on that Air Conditioner. The refrigerant movement will make some noise, and when its low, it gets louder since the fluid moves faster/easier. It is the refrigerant that makes the warm air cold, which is sent out. It happens once every couple of minutes and sounds like its coming from the far right vent. If you hear a hissing sound near your A/C, then it could be a leaking refrigerant line, a leaking valve, or a bad compressor. The MDX engine area is very small, but from what I could tell it seemed to be coming from more of the front / bottom section of the engine area, meaning it could be more the radiator (area). My Car Makes A Noise When I Turn The Heater On. The air condition in my 98 Mercedes E320 makes a loud seeping/hissing noise when turning on the a/c. Due to my busy schedule, just this weekend I began to troubleshoot the suspected leak. This hiss increased and decreased with acceleration and deceleration. Video in comments. Hissing sounds indicate that there is probably a leak lurking somewhere, if you hear a hissing sound coming from your AC, it's likely either a ductwork issue or a refrigerant leak. When I turn it on in the car to (auto), I have the hissing discharging noise behind the AC panel. Although this hissing noise, sounds like a bad noise, it’s actually a good air conditioning noise. Leaks in the refrigerant lines can also cause hissing and bubbling noises that are not as severe. If the noise is coming from the walls, there's a good chance your ducts are leaking. This is on an M800. Other signs include accelerator problems or an idling speed that is faster than it should be. My air conditioner in my Venture is not working. Air conditioner or heat pump noise diagnosis & cure: HVAC systems can produce a stunning range of noises many of which can help lead quickly to the trouble source and thus can help tell us what repair is needed. Hi all, I am a DIY enthusiast but when it comes to AC, I am a complete novice. Sound or a sound that is loud, unpleasant, unexpected, or undesired. Your AC is making this strange hissing/bubbling noise and you’re not sure how serious the problem is. 4 Is it hissing while it is off?. Among the possible causes are leaky refrigerant lines, an internal valve leak or a serious issue with your compressor. Some of the most common reasons for a hissing sound coming from your air conditioner can be found here. Step 2 - Reduce the Noise. HISSING LEAK ON THE WALL; Author: josefaz (AZ) For the past few I weeks we noticed a hissing noise behind our bathroom walls, as if water is running somewhere. You hear a bubbling or hissing noise coming from the refrigerator coils. Discussion i have a 6. I heard a pop whilst watching a youtube video and think it started then. Although this hissing noise, sounds like a bad noise, it’s actually a good air conditioning noise. Try to keep the car at about the same speed (so the sound does not change do to a speed change) and feather the throttle in and out a bit. this is the fourth bm i. When the compressor compresses the gas to high pressure, heat is created and expelled by the fan to make sure the unit does not overheat. It blew icy cold for a short while so I was made up but then it started making a hissing noise, and became ineffective. FOR BMW 3 Series E46 1998-2006 High-quality 7"/16:9 LCD display with capacitive touchscreen (1024 x 600 resolution) CANBUS integration. And about a week ago I started hearing a hissing noise inside the cabin (like a air leak in a vacuum). Just got the wifes van all taken care of and my van tosses a flagfired up the AC the other day{have front and rear system} and I hear a hissing kind of sound "fade in and out" from the rear systemblows cool while the front is fairly cold. Refrigerant Leaks. Could it be the break booster? I am not sure. On hot, sunny days, few things are more frustrating than having to ride around in a car with a nonfunctional cooling system. Hi When AC is working I hear an hissing noise coming from the passenger side. it has done 90,000 miles. I'm getting an intermittent hissing noise coming from behind the passenger dash area. If a refrigerant leak develops, you may hear a light hissing sound as the refrigerant leaves through the leak. I had the same with my CLK last year. Light dimmers and other consumer devices can be the same. I listened carefully for the hissing sound, yesterday, and now think that it might have something to do with the operation of the Quadra-Lift System, instead of the HVAC system. I know that I have a TEV, and I've read online that these can sometimes hiss, but I wanted to see if that's likely what the cause is or if it's possibly something else. The AC Adapter of the HP or Compaq Notebook PC makes a hissing, and/or crackling noise and may feel warm to the touch. It is letting the air out. I have a hissing noise coming from the HVAC controls on a 2004 GMC Sonoma 4WD. worked fine on the way home but now when the car is turn off I hear hissing noise coming from the air vents??!! ac was only blowing semi cold when i started the car again May 29, 2015 : Followup from the Pelican Staff: You could have a leaking evaporator. I would think that if I was losing freon (due to the hissing sound), that the low pressure switch would trip and tell the pump not to turn on. Seems like it is in between the pulleys and the firewall. As you turn it down the noise gets quieter and when the fan is on low …. 4L 86,000 M Hello, I was changing vent settings from blowing forward (heater, not AC), to defrost last week and as soon as I adjusted the vent selection dial I began to hear a "hissing" sound. This is on an M800. When the air-conditioning is running the condenser fan will pull additional air through the radiator and the condenser. My car airconditioner makes hiss sound what is the issue? not usually over the engine noise. E46 M3 6MT 2 points · 5 years ago. Air conditioning systems are a staple of life, particularly in towns like Daytona Beach, FL, which experiences hot, tropical weather. This sounds like gas is escaping from the AC system and is a warning that something is going on that needs attention. This hissing sound, plus that bubbling you hear sometimes, can actually have a few potential causes—and they are all ones that you want to address quickly. There is a hissing noise coming from the unit where the refrigerant lines go into the evaporator. If it’s still blowing cold air, it will take an extremely long time to cool your home, causing your air conditioner to run for much longer periods of time. I know that's not near the driveshaft but I don't know of anything down there that would make a hissing sound. This, however, is not a permanent fix and the problem should be tended to by an AC repair. Page 1 of 2 - Hissing sound from aircon - posted in Maintenance & Repairs: My aircon has been doing the darth vader ever since i replaced the aircon clutch and topped up the gas and aircon oil. Some of the most common reasons for a hissing sound coming from your air conditioner can be found here. If the window is a triple-track type with a screen panel included, remove the screen completely before installation. Shop at 1A Auto for a brand new A/C Compressor Bypass Pulley for your vehicle, at a great price. Has anyone had a similar problem ifso what is the fix? its really doing my head in lol. When it does, it runs the air over vanes full of super cold air conditioning fluid. Four Common Car Noises, Their Causes, and How to Fix Them. Some are minor and some are very serious like VANOS failures and subframe splits. anyway, they didn't find any obvious leaks, just low on refrigerant. This happens most often when they are not connected to a device or otherwise in use, and stop making noise when I connect a load to it such as by plugging in a device that is not fully charged. Built-In bluetooth (external microphone. If you’re hearing a hissing noise near the compressor, however, it can indicate a rapid refrigerant leak that needs prompt, professional attention. I'm hooked. I checked the high and low pressure with a set of manifold gauges and had to put a can of R134A in to get the compressor clutch to come on. As long as you don’t also hear a hissing sound, trumpeting at shutdown is not a concern. BMW E46 vehicles are equipped with a climate control system (IHKA) with multiple sensors, controls, air temperature units and ducts. Without the a/c or heat on, upon start up, I hear a hissing sound coming from behind the dash. I have a 2002 Honda Accord coupe with 130K miles on it. Still, it did not correct the situation. I have had a hissing noise from under the dash for a couple of years now. Expensive energy bills. Hi all, I am a DIY enthusiast but when it comes to AC, I am a complete novice. 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. I also noticed that the hissing / whining noise kind of goes with the engine speed. Sadly, the replacement produces the exact same issue. Noise ends for the 1st time @00:11. BMW 3-Series E46 (1998 - 2005) - 00 3. It does it with the ac on and without it on. Hissing present, air is warm. Why does your central air conditioner make a hissing noise? because that air conditioner is full of air. Sound or a sound of any kind: The only noise was the wind in the pines. I have a 2002 Honda Accord coupe with 130K miles on it. Why?, House, 28 replies Pipes making squeal high pitched noise?, House, 0 replies gas boiler is making a whining noise, House, 3 replies New ac filter hissing sound, House, 0 replies. The heavy fan motor is mounted on the panel, so have a helper hold it while you install the air conditioner sound. Your air conditioner makes a steady, even sound. May 24, 2010 my air conditioner cools fine, but when the clutch pulls in it makes a grinding noise. Patient continues with car started with no pressing on the brake and even with the e brake off engine in park. The noise stops if I shut off the compressor. AC Making a Buzzing Noise. There is a hissing noise coming from the unit where the refrigerant lines go into the evaporator. 2016 with hissing noise and ac problems They kept it for a day and told me it is supposed to sound like that. The noise stops if I shut off the compressor. It blew icy cold for a short while so I was made up but then it started making a hissing noise, and became ineffective. The gas system is very very very clean. Water pipes that make a hiss or whoosh sound are indicative of water leaks. My air conditioner on my 2003 BMW 325i keeps on going on the fritz. I would evacuate the. If a refrigerant leak develops, you may hear a light hissing sound as the refrigerant escapes through the leak. Get High frequency Sounds from Soundsnap, the Leading Sound Library for Unlimited SFX Downloads. Next, ask yourself what the noise sounds like. Sorta like quick bursts from an air hose is the noise. If this is your problem, you’ll hear the hissing noise inside your home and only when the air handler unit (blower fan) is operating. Check out our crackling noise guide for more information. Noise can be random or white noise with an even frequency distribution, or frequency dependent noise introduced by a device's mechanism or signal processing algorithms. If you’re looking for heating repair Baltimore so that you may keep your home warm, please check out some other articles on our blog as this article asks a very important question – why is my air conditioner making a hissing sound?. AIR CONDITIONER FEATURES. It increases in intensity along with the engine RPMs. Hearing a hissing noise most likely means air is escaping from your system. The clutch is then released and the RPMs pick up again. php(143) : runtime-created function(1) : eval()'d code(156) : runtime-created function(1. Refrigerant leak noise. 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. Usually a black hose with a blue tracer, it will come loose from the attachment point and rub on the steering shaft over time causing a leak/noise. 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. Dell Inspiron 15 7000 - Buzz/electrical noise (hard to describe) when connected to AC I notice an electrical/buzzing sound when my laptop is connected to the mains. Here are some of the most commonly heard air conditioner noises and what they can mean: Hissing. Hissing/Airy noise when pressing gas pedal? Check your air cleaner/box, make sure it is all put together. AC is blowing warm and I hear a hissing sound from rear cargo area behind passenger side panel. Check out our hissing noise guide for more on that. If the noise is coming from the walls, there’s a good chance your ducts are leaking. possibly the lower gasket is leaking, what do you think i. Had a major service last week and the air con re gassed as it didn't appear to be working at all (only just bought car). when i accelerate it goes away. It does it with the ac on and without it on. It seemed to work reasonably well, but I wasn't convinced. hissing sound when shutting off engine of 2002 f-150 Post by dzodzo » Thu May 14, 2015 8:54 pm There is a sound like air pressure releasing when I turn off the engine of my 2002 f-150. When the steering wheel is at the end of its travel (completely left/right) it is normal that the power steering pump starts making some extra noise. You can replace the clutch. So what does a hissing sound mean?. So if you hear unusual sounds coming from your air conditioner during normal operation, don't ignore them, as this could be a sign that the unit needs a repair or upgrade. Its a constant noise and my voice cant ever be heard in recordings. 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. But having your HVAC system breakdown in the heat of a Georgia summer is a worst-case scenario. Hey guys just a weird question, I just installed a walbro 190 fuel pump about a week ago and everything was fine (noise wise besides your normal wine) but now all the sudden (today) I noticed a hissing sound near the fuel tank under the car. It makes a hissing sound when I turn it on which is the first sign that it is going down. 4 Power Stroke Hissing Noise. The Decibel Meter shows examples of things that make noise and measurements in decibels. Debris in the outdoor unit will cause a noise outside your house. Other signs include accelerator problems or an idling speed that is faster than it should be. It s like a hissing gas like sound that lasts around 30 - 60 seconds. Refrigerant can be dangerous to humans so have this. The situation: A high-pitched hissing or screaming sound. Even a very small leak can produce a loud hissing noise. Your air conditioner will sometimes make hissing sounds as part of its regular operation. Use your hand to check the compressor fan air. Radio not working then fixed it's self any ideas why this happens?. If a refrigerant leak develops, you may hear a light hissing sound as the refrigerant flees through the leak. The expansion valve allows the cooled and liquified refrigerant to expand, becoming really cold, which then flows through the evaporator. I returned it for another device and noticed that it makes the same noise. 3 weeks later it's giving me grief again, when the ignition is turned to position 2 there is a 4 second hiss from the engine near the inlet manifold and yet again the performance i briefly enjoyed is now rubbish again. [John Sargent] One of my 740s made a hissing sound from under the dash in the area of the heater temperature control lever. I don't know if car made this. Hissing HVAC Noise Descriptions & Recordings Hissing air conditioner or heat pump noise cause & repair. Foreign Objects. A hissing AC system is not only normal but good. I've got an AC3 file which, when played, has a distinct hissing noise in the background. High-efficiency AC units incorporate sound-dampening technology and two-stage (variable speed) compressors to keep noise levels below 55 decibels. Shop at 1A Auto for a brand new A/C Compressor Bypass Pulley for your vehicle, at a great price. We're going to help you understand what’s occurring with your air conditioner and what you can do to correct it. I have a hissing noise coming from behind the dash on the passengers side. Bmw e46 noise when AC is turned on. Air conditioners are made up of several parts that all must be in proper working order if you want an efficient system that can get your home to the desired temperature. Among the possible causes are leaky refrigerant lines, an internal valve leak or a serious issue with your compressor. However, if you're hearing an unusual air conditioner noise like banging, buzzing, whistling, screeching or rattling, it can be a symptom of a system that's struggling and headed for a breakdown. The first time I tried adding R134A (with dye) the compressor and radiator fans kicked on. Leaks in the refrigerant lines can also cause hissing and bubbling noises that are not as severe. This sound is related to the brake pedal for sure. Check Output Hiss Only to hear hiss and reduce with slider controls. The situation: A high-pitched hissing or screaming sound. Why?, Cats Forum, 6 replies gas boiler is making a whining noise, House Forum, 2 replies Oil pressure gauge fluctuating and hissing noise (prob 2 separate things), Automotive Forum, 1 replies Baltimore is really making some noise, Baltimore Forum, 2. 5V TDI and when we were test driving the car, I didn't actually notice this issue since we didn't do extensive driving and I wasn't listening for this problem specifically. Average failure mileage is 10,650 miles. I had the same with my CLK last year. Automotive AC can be one dangerous system to work on. Some A/C parts can only be sourced from BMW and are expensive. Make hissing noise when turn on ac or defrost. Sample your hiss audio and Capture Noise Floor in the dialog box. If the window is a triple-track type with a screen panel included, remove the screen completely before installation. Sounds like the compressor kicks in and the revs go up but no cold air just the same as without the aircon button lit up. The perfect example is when your AC is making a hissing noise. Noise coming from the AC system while compressor is ON. I recently started to hear a hissing sound from the air vents when I turn the AC on. I would evacuate the. F1 – F2 – F3 – F4 – F5 (5A) Horn relay. It isn't likely that the few minutes of exposure to fumes have harmed you, so don't worry too much about that. Among the possible causes are leaky refrigerant lines, an internal valve leak or a serious issue with your compressor. 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. Diagnosing a transmission is the same as anything else; it often ends up being a process of elimination. I’m getting a hissing noise coming from my A/C vents when running the air. F7 (5A) Convertible top actuation switch, navigation system control module, audio unit output amp lifier, digital multifunction display, telephone audio unit. Radio not working then fixed it's self any ideas why this happens?. " This type of noise from the compressor can indicate a dangerous situation. Dodge Caravan - a/c hissing noise from under dash - Hi, I have a 2002 dodge grand caravan 3. I have no idea what it could be. Expensive energy bills. A common one is a hissing noise, which can signal a number of different issues that require professional attention. Foreign Objects. A squeal coming from any of your wheels can be a brake pad issue, Cars. Amplitude measures how forceful the wave is. If you’re hearing a hissing noise near the compressor, however, it can indicate a rapid refrigerant leak that needs prompt, professional attention. Archived from groups: alt. The 5 car ac components that make the air blow cold. I took the car to the mechanic who re-gassed the AC system and now when I turn on the AC there is a hissing noise from the engine bay just below the alternator. F6 (5A) Vanity mirror lamps, convertible top control module. Hissing - Hissing can be caused by a damanged refrigerant line, an internal valve leak or the compressor. I have recorded the noise and uploaded the file to this thread. The expansion valve, which lowers the pressure of the refrigerant gas as it moves from the condenser coil, creates brief a hissing that lasts only a few seconds. Over the past few months my 330Ci developed a whine from one of the belts or pulley in very specific conditions - only when cold and when accelerating from 500 to 1000rpm (max acceleration). It delivers low-level sound directly into the ear to cover the ear noise. Most likely cause: Your compressor. The noise from an air conditioning unit can have lots of causes depending on the type of unit. worked fine on the way home but now when the car is turn off I hear hissing noise coming from the air vents??!! ac was only blowing semi cold when i started the car again May 29, 2015 : Followup from the Pelican Staff: You could have a leaking evaporator. I just wondered if the noise is normal or indicated the problem with the expasion valve or R12 leak. Is the ground wire located near a noise source (like a heater, air conditioner, or computer)? I get the hissing sound. The first time I tried adding R134A (with dye) the compressor and radiator fans kicked on. A few days ago the AC started to make a loud roaring noise when it is turned on full blast. AC Hissing noise General E46 Forum. ) and for several seconds after. The noise comes and goes and does not increase with acceleration or decelerartion. Some days ago I got my T440s equipped with a 256GB SSD, 8GB RAM and NVidia GPU. But first, let's look at how low airflow causes your air conditioning system to produce that whistling sound: Why low airflow causes whistling. This is often best done by trial and error, adjusting the sliders and using the Preview button to listen to a few seconds of audio after noise reduction. Radio not working then fixed it's self any ideas why this happens?. wireless (> Does the sound come from the router or the power supply? > If it is the power supply you may replace it. Usually a black hose with a blue tracer, it will come loose from the attachment point and rub on the steering shaft over time causing a leak/noise. It isn't likely that the few minutes of exposure to fumes have harmed you, so don't worry too much about that. Occurs at the outside air conditioning unit when the AC first turns on. When I press the break it goes away but when I release the noise comes. However it only blew out warm/ambient air. Recently within the past 2 weeks. At The Tedder Company, we recommend a maintenance inspection at least once a year to inspect the health of your air conditioner. The noise you’re hearing is usually a sign of “ electrical arcing”, an electrical discharge you see when electricity is jumping between circuitry. Does the sound change as you transition from minor acceleration to minor deceleration? If the sound does change in this testing, it is likely from the differential. Whenever your air conditioner starts to make strange noises, contact Hydes as soon as possible. When the hissing noise goes away, the a/c goes back to cooling. Among the possible causes are leaky refrigerant lines, an internal valve leak or a serious issue with your compressor. 2016 with hissing noise and ac problems They kept it for a day and told me it is supposed to sound like that. So, turned a/c off, and just use air vents (turned off the recycle air button). hissing sound when shutting off engine of 2002 f-150 Post by dzodzo » Thu May 14, 2015 8:54 pm There is a sound like air pressure releasing when I turn off the engine of my 2002 f-150. Question Need help with buzzing noise coming from Mobo around the Cpu area. In most cases, a hissing or bubbling sound is caused by a refrigerant leak. But having your HVAC system breakdown in the heat of a Georgia summer is a worst-case scenario. My 2005 m3 coupe has this air hissing noise inside car seems like it's coming from passenger side behind dashboard. If it was hissing and now does not get cold then you had a leak and. The AC unit itself may shut off and turn back on frequently. * * When the ice buildup on evaporator coils happens , the compressor stops. If the unit is cycled on and off quickly or is on too long, it will make this sound. The weird part is, there is a hissing sound that comes from the center stack vents when the AC is on. A buzzing noise is usually a sign that there’s an electrical issue with the AC. Even base models have the right look, the right size, stellar driving dynamics, and an interior that’s still. As it entered the system the cooling fan started to run faster and faster. Don’t worry, if the HVAC is making a buzzing noise you’re not alone. Last time they recharged the AC / added freon it got better for few weeks but back to the same problem. when i accelerate it goes away. I actually live on a street with speed 'humps' (the wider/more gradual style of speed bump) so I'm keenly aware of when my shocks start to fail. For the last year or so with my window open I can hear an air noise every time I go over bumps coming from what sounds like the shocks. Take a minute to review my page about automotive air conditioning safety. After taking delivery of the car, I couldnt help but notice a hissing sound coming when the AC runs, I was afraid it was a gas leak. What else could it be? Follow. about careers press advertise blog. Refrigerant Leaks. In fact, a hissing noise is usually a red flag that the leak is significant. Why Does My AC Make a Popping Sound? Have you noticed weird sounds coming from your AC unit lately? Maybe these sounds are popping noises that almost sound like a big piece of popping popcorn, or perhaps they sound more like firecrackers. When the compressor compresses the gas to high pressure, heat is created and expelled by the fan to make sure the unit does not overheat. This leak is what is responsible for the hissing sound. Notice: Undefined index: HTTP_REFERER in /home/baeletrica/www/rwmryt/eanq. I don't remember hearing this before, but now that the temperatures are over 100 here, it seems to be more prevalent. 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. It seems the expansion tank is compressed and when the cap is opened, the compressed air comes out from the tank immediately.