How to fix hissing sound in car ac reddit. Our AC hisses before the AC runs, during, and after.
How to fix hissing sound in car ac reddit Thus the hissing/buzzing. Swapped out the AUX cable with seemed to temporarily fix the issue until I started doing cable management. It comes and goes, but the sound is rather concerning. The hissing sound from the car AC when the car is off is the car equalizing pressure. Moved the AUX cable around my setup to pinpoint the noise. Identifying the specific cause will help you determine the necessary steps to resolve the issue. It was cool, but not cold. Why Does My Car Make Noise When AC Is On? Thanks for posting on r/MechanicAdvice!This is just a reminder to review the rules. Maybe somebody can tell me if an unattached breather tube would cause a hissing sound/hard steering when turning the steering wheel. Turned out to be the electric fan controller. IEMs are prone to this since they are relatively higher in sensitivity, which means those little noise signals get picked up easily. By following these steps, you can identify and resolve the source of the hissing sound, ensuring optimal performance of your car’s AC system. When I took it in, they said the refrigerant just needed a recharge. If you are here asking about a second opinion (ie "Is the shop trying to fleece me?"), please read through CJM8515's post on the subject. Should I take it to the dealer? I was told the 30 day warranty only covers power train. I'm hoping maybe somebody hear has some advice on what it might be. It was fine. AC blows cold but there is a hissing noise that occurs when I turn it on or off, like a gas escaping a cylinder. My Buick Encore never had this sound until recently. car is already at 90k miles bought it brand new in 2016. You have a newer Civic, so idk if its the same issue as my car. I’ve called local mechanics and they’re all booked out for next couple weeks. But definitely the the hissing sound comes up now and then whilst driving. It's the AC blower motor under the passenger side dash. It could mean something’s wrong with it. Conclusion. Hissing sounds from a car’s AC system can be indicative of various underlying issues. My last repair was only 3 weeks ago where they replaced a two month old condessor. Know it, live it, live it. I did a quick google search for "ac noise" and didn't find anything specific to this noise, but some things talking about how a "screaming" noise means "very bad" and you should turn off your AC immediately. Beyond that, when you record, just let the recording run for 10-20 seconds with the mic open so you can get a decent noise profile for the noise reduction. ) but Car was parked at the airport for a week and when I picked it up the AC wasn't blowing so cold, more like cool, and it was making a hissing sound every 30 seconds. It doesn't happen each time I turn it on, just on occasional it'll happen. A hissing sound from your AC generally isn’t a sign of a more serious condition like a refrigerant leak. The Unofficial place for your Cruze needs! If you are visiting to find help for a mechanical issue, please check out the pinned posts at the top of the sub to learn about the most common problems and how to fix them. I called installers, but ok to keep it on a few hours a day meanwhile ? (Heatwave here) There can be several reasons why an air conditioning unit is making noise. We rent an apartment. What you should do is have the system leak checked by a shop that is competent with air conditioning and has the tools and knowledge to diagnose it properly (there are lots of shops that are not good at air conditioning). To fix the problem, you need to take your car to a repair shop where they can locate the leak and fix whatever component is broken. Really annoying bug, whom only fix is to reload the game by fast traveling or loading a save. The compressor will be the most expensive piece of the puzzle. Scrambled to tighten the loose one back up and walked away only to hear it blow with a much louder hissing sound. Chances are a "recharge" with one of those $39 kits is NOT going to fix it, but Thanks for posting on r/MechanicAdvice!This is just a reminder to review the rules. Recently my AC started to make a hissing sound like gas is escaping. The loud pop sound only happened when the unit started blowing and when it stopped. I noticed about 2 weeks after purchasing it that whenever I turned off the car it made a strange hissing noise. It sounds almost as though some gas valve is slowly opened and closed. Short and simple, radiator needs to be serviced. Thanks for posting on r/MechanicAdvice!This is just a reminder to review the rules. Now 3rd issue in 12 months and after 3 days the dealer thinks they have fixed a 3rd leak but the noise is coming back…. Refrigerant was low and needed a recharge. Got the full ac system replaced recently. Feb 28, 2024 · A hissing sound from the AC signals the need for a professional check-up to avoid potential breakdowns. Reply reply More replies Landlord needs to fix this. Thanks, The car is a 2013 Hyundai Elantra. It sounds like it’s coming from inside the dash behind the drivers side vents. I assume the hissing is water trying to slowly refill the tank. I should have added that if the sound goes away when shutting off power then you probably don't have a leak. The expansion valve allows the cooled and liquified refrigerant to expand, becoming really cold, which then flows through the evaporator. About a month ago we started noticing sometimes when you first start the vehicle up you hear a hissing sound coming out of the middle of the dash. My AC hisses sometimes while compressor Kicks after i switch on the car. and remember rule 3a, please post the year/make/model of the vehicle you are working on. The first step in fixing a hissing sound in your car’s AC is to identify the source. This isn’t a big problem, and it shouldn’t get worse. Posted by u/football2106 - 2 votes and 6 comments While I was standing there trying to figure out what was happening, it stopped. The air coming out is much less “chilled” than in the past and has a hard time keeping the whole car cooled, especially on a hot sunny day. The hissing sound only happens when the A/C is on, but the dripping happens regardless (although it seems to slow down over time while the A/C is off, as if the water Even a very basic USB interface would probably go a long way to help your sound. Prompt action ensures your vehicle remains comfortable and functional, averting more issues. So at least I know the sound was something to do with AC stuff (sprung a leak somewhere). They have replaced two condessors, compressor and AC hose pipe. Buzzing/Hissing? Here's what I tried: Swapped out the GoXLR on another system (laptop). We just turned it off and let it melt. com May 3, 2022 · The leaking pressure will make a hissing sound. Sometimes it won't do it often, sometimes it's constant start and stop. It was coming from the front of my car under the hood. My 99 Civic was making the same noise, so I removed the blower motor and cleaned it out. Nov 14, 2022 · How Much Does it Cost to Fix Hissing Sound in Car AC. 5 months and it makes the noise occassionally while i drive. I notice that the water line in the tank goes down slightly and that is when I hear the hissing. If you regas a car with a hissing noise I would suggest you will be regassing the neighbourhood. I've had this same experience with the ZSN Pro X, which is one of the more notorious IEMs of recent generation. Doesn’t necessarily mean it’s the evaporator. It’s the result of lazy mechanics and Honda parts that could be better EDX being too sensitive hence the hissing/buzzing Yep, and it picks up those electronic noises from the source. 2016 Explorer with dual climate zones and controls for the rear. Got an iphone 14 pro and when recording video in the native+3rd party apps, there is some intense static+white noise in the video, even when staying in a very silent room and not moving at all. Jan 30, 2025 · If your car’s AC is making a hissing sound, it’s important to have it checked out by a qualified mechanic as soon as possible. I own a 2019 Honda Civic and at times when I turn the AC in, there's a short hissing sound. The hissing noise is often a symptom of an underlying issue that needs to be addressed. Is it a very old heater or fairly new? My 2014 Santa Fe Sport made a hissing noise from under the dash this past winter. Cooling is fine. Now, I've had it for 2. It repeat every time compressor off on. condenser). You will soon hear a hissing noise. -Car has not been ran since, battery disconnected -Can I recharge the AC myself? My indoor AC unit started making this hissing sound, even with the system off for many hours. Hey Guys, I had an AC leak and occassional hissing sound about 8 months ago which ended up being a leaking evaporator. If this sound occurs after the car is turned off, it's your car's way of equalizing pressure. Best advice I can give is take it to a professional as the AC system runs throughout the car. Today I got an AC pro kit. The cost to fix the hissing noise in car AC can vary depending on the cause of the issue. AC started making hissing sounds coming from the vents seems like. The sound could be resonating up the pipe from inside the heater. Hissing had never happened before. One common cause is a dirty or clogged air filter, which can obstruct airflow and cause the system to work harder, resulting in increased noise. there are plenty of good youtube videos explaining it. 6 - Do your homework next time, seriously we don't need more shitty techs in the field that have no idea what they're doing and expect There is a seal at the point where the rod connected to the brake pedal enters the booster, but its only purpose is really to prevent that hissing noise when pressing the pedal. So I figured I’d ask on here. ” So I was told to take it to a specialized auto AC repair shop. Sounded kind of like a vacuum leak, but no codes, everything worked fine, and I've heard similar sounds in a lot of newer cars (prior to this car, my newest was a 1997 Grand Caravan with ALL the issues) so I noticed a Hissing sound coming from my AC in my 2018 Durango. Probably the only time in history that's ever actually fixed an AC unit. The hissing lasts 3-5 seconds then stops for 5-10 seconds, then starts again. Can anyone tell me what this problem could be. First photo is when I hear hissing (lower water level). View community ranking In the Top 5% of largest There is a seal/noise dampener at the point where the pushrod goes through the firewall and enters into the brake booster. If the hissing is louder than usual or persistent, it could indicate a problem with the valve. 2nd visit was AC completely stopped working along with blower fan which was a leak = repair. Oct 19, 2023 · I. I don't know what was done with the car prior to 104k miles. 1 previous owner - clean car fax, standard servicing. Jul 23, 2023 · A hissing sound from an AC isn't always a troubling sound for car owners. Preventing the hissing sound in your car’s AC system is key to maintaining its optimal performance. A malfunctioning AC compressor is one of the main causes of a hissing sound coming from the car’s air conditioner. Ohm’s Law. Identify the Source of the Hissing Sound. I’ll be honest with you. Ok, to start, V=IR. Sounds like a bottle is being filled up with air and being pressurized and then it let's out when the brake is pushed on the car. I just had the coolant recharged over the weekend and that had no problem. See the photos to see the water level difference. There is no odour of gas or impact on cooling. Can you help me ? I heard a hissing noise like something deflating and this sound went on for several minutes. recently. I just purchased a Portable Air Conditioner unit and after turning it to cooling for the first time, it is making an intermittent drip/hissing sound that can be heard in this video: Okay, so our indoor a/c unit (I'm not sure what it's called, it's in a closet in the hallway), has started making a hissing sound. The AC vent on extreme left seems to produce warmer air in comparison to other 3 vents. To understand why your car AC is making a whistling noise, it’s important to first understand how it works and its components. Coolant first, start the car, then Transmission fluid. I wasn't the one who replaced the compressor so I don't know about blowing out the lines but the condenser and accumulator almost definitely weren't changed. Quick Leak Detection : Advising users on early signs of refrigerant leaks can save time and prevent AC performance issues. the AC is working and pushing out slightly cold air when on, but there’s a loud hissing sound every few hours when the system turns on. If the problem is due to a simple fix like a dirty air filter or a loose hose, the cost could be relatively low, ranging from $50 to $200. Trying to replace the radiator earlier when I took out one condenser line and loosened the other then heard hissing. Jun 29, 2023 · In this article, we will discuss 5 easy fixes for a hissing car AC. The noise I hear when I got under the car sounds like it's coming from right where the bellow boot attaches to the rack and pinion so a loose breather tube would make sense. I don’t recall hearing this previously. This could be due to a refrigerant leak or a malfunctioning component within the system. From what I gather from the internet the AC coolant is low and I need to refill it (Found out how I can fix this myself), however the AC coolant refill (R1234YF) is 140$ USD from AutoZone. Any ideas as to why there's a short hissing sound? Thanks in advance! Feb 6, 2023 · Why Is My Car’s AC Hissing After the Engine Is Shut Off? If your car AC is making a hissing sound only when you turn the engine off, it means there is a leak in the system. Hissing noise when turning on ac in car on the ac and there was a slight hissing noise on Yeah I’m having the same issue. If opening and closing the valve didn't make a difference then it's probably not coming from this particular radiator unless that valve does not hold at all so closing it doesn't change the sound. It happened right at the exchanger. When I bought it, there was an issue with the AC not blowing cold during idle. Since replacing this evaporator (aftermarket), I've still got the hissing noise coming from behind the dash which lasts about 5 seconds every time the AC compressor kicks in. We ended up finding the exact spot it was happening and tapped that whole section down with a golf ball in the center. Does it make the noise only if AC was on? I had a similar noise with my old integra. It’s not continuous but rather every 30-50 secs and last for few seconds and goes off and comes back again. Even Behringer's little $30 adapter doesn't completely suck if you really can't spend $$. This pointed to my current setup. I want to check if this is still safe to use, since i cannot find anything similar on the internet and the adapter itself comes with the dry cabinet and it has to be May 30, 2023 · Prevention Tips to Avoid Hissing Sound in Car AC. I’m pretty handy with cars. 4 - Once the hissing noise becomes louder place balloon over the liquid line. Now it’s no longer cooling. I looked online and the only thing I seen where results for ac leaks. Rev 1. Car Air Conditioning Hissing When Off. Nothing out of the ordinary sound wise under the hood. As another have said, an external DAC should be able to fix the issue. The tech brought up refrigerant after hearing the noise near the coils. A subreddit for Heating, Ventilation, & Air Conditioning Technicians. I'd suggest assuming it's the elevator, and reporting it to the property owners. Work on all of mine myself but I’ve never dealt with AC stuff. I brought it into the shop (I've put on 1k miles since purchasing and I lease a 2019 Honda Accord EX, recently I started hearing a Hiss noise in the AC when I turn it on. If the motor developed a fault that increased its electrical resistance, that would lead to a reduction in the current draw of the motor. I took it to a shop and they told me they couldn’t go any further when diagnosing because they felt like they would have to go through the dash and they “don’t do that. When I turn off my AC, the sound goes away. I had Honda change the condenser. 2 SI6 Volvo engine. Once while starting and occasionally while running. No flag on the dash, tried turning it off and on and still has that sound. Mine started squeaking like that by 30k miles, so I had a local chevy dealer replace it under warranty. Blows warm ambient air. Our AC hisses before the AC runs, during, and after. A few minutes later it started again, but only for a moment. The noise could be radiating (no pun intended) from something adjacent such as a downstairs radiator or a leak. But now, the AC system seems to produce hissing sound. That kind of noise is an indication that things are not going very well, and maintenance is better than repair. I can hear high pitched hissing sound from the car vents as soon as I turn in the AC and car is in motion. It's possible the filter is just dirty and this hissing is the air trying to pass through. AC seems to hardly be putting out cool air too. If it's squeaking that bad you'd hear it coming down the stairs, possibly. Wifey works at a dealership so she tried to get it diagnosed but they told her the Jeep’s AC charging ports are not common/proprietary to jeep. Since it’s getting colder here in GA I haven’t been running the AC all the time but every time I do it makes this sound. The hiss come and goes. The blower motor is molded into the plastic housing from the factory, so they'll have to cut the plastic around the blower motor to get it out. Sorry for the basic question but I recently turned on my AC unit for the first time this year and am noticing a hissing sound coming from the lines inside my home. It's how the AC works. when the ac is on, there is a loud hissing sound coming from the indoor unit in the basement (i’m not sure what the unit is called). However it’s been running fine for years. I also was able to hear a hissing that would then alternate to the squeal. Everything worked great except for a slight hiss I could hear once in a while while driving the car. Get the sound right at the start so there is nothing to fix. High pitch hissing on ac/dc power adapter There is a pretty loud whine/hiss that suddenly appeared yesterday and it is coming from a ac/dc power adapter from my dry cabinet. I searched online and didn't find a clear answer. Momentary hissing sound from car AC vent upvote While driving it suddenly makes this sound out of nowhere. Asking about a second opinion (ie "Is the shop trying to fleece me?"), please read through CJM8515's post on the subject. This includes inspections, cleaning, and any necessary repairs. Understanding the Issue: AC Making Hissing Noise and Not Cooling A. Whole system was replaced as old one was contaminated with debris. This article will discuss what might be causing that hissing sound in your AC. com See full list on rxmechanic. This will create a hissing noise as you press the pedal. It's super annoying my car sounds like Darth Vader and it gives me anxiety. My thought is that the pipe or something might be lose or damaged. Another possible reason is a malfunctioning fan motor or a loose fan belt, causing rattling or squeaking sounds. the Defrost causes the noise because the defrost uses the AC to condense ambient humidity on the evaporator coils, keeping the air inside the car drier and helping prevent fogging windows. Sometimes there's a kind of hissing/simmering sound coming from the condenser area when I have the AC on during a cold start. I also notice that the closet is cooler than the surrounding area, but I think it may have always been this way. Any ideas. 3 Wadenelsonredditor At the end of this piece I'm gonna tell 9/10 of you to "take your car to an Auto AC repair professional" but -- let's get started! Your AC isn't blowing cold. 2007 Camry 110k miles(10k overdue for service 100k mile specifically) noticed I turned the car off and heard a hissing/air releasing sound from which sounded like the rear right side near the tire. After fixing the tire I drive again and now the AC does not blow cold. On the drive home one of the pipes froze over and the fan stopped blowing. Here are some tips to help you avoid such issues: Regular Maintenance. I've tried plenty a dongle DACs and the one that consistenly has been hiss free and is cheap is the JCALLY JA21. 2015 Toyota Highlander v6. Dec 7, 2024 · use the following search parameters to narrow your results: subreddit:subreddit find submissions in "subreddit" author:username find submissions by "username" site:example. Schedule regular maintenance for your car’s AC system. When there is a leak, the refrigerant may escape and create a hissing sound as it passes through the damaged area. Check the fluid levels of all your fluids in your car (IMPORTANT NOTE: You will need to have the car on to check the Transmission fluid but never check the Coolant with the car on or hot or else if there is coolant it will exit at high speeds and be very hot and overall ruin your day. It seemed to make the driver left side air much cooler, right side driver vent a little cooler, could not really tell any difference with the other two. Hi all! Tried scouring the internet for hours with no real solution. Best solution - Keep the sound digital, within the computer, and then no noise gets introduced. Didn’t make another sound! I should also point out it doesn't just don't this whe the ac is on. Bought the car 3 weeks ago. Members Online It’s much easier to fix a normal car as it doesn’t require non-conductive aspects. When a booster fails due to a vacuum leak, the brake pedal actually gets extremely stiff because the vacuum chamber can't pull the diaphragm when there is no vacuum. There is no noise at first, but within a minute or so of running, it starts up, getting louder/more prominent as it runs. Didn’t have enough time to check if tire has a leak could it be anything else ? Sep 2, 2024 · Common Causes of a Hissing Noise in a Car AC. Either pay them to fix it, or have them find the leak, and discharge the system, so you can fix it. Sometimes even when the AC is not running! The hissing is so loud and we can hear it through the bedroom door with the ceiling fan running at night. Same bug, the sound you get when you walk or run through bushes/vegetation (either the ones where you can hide, or the healing plants) remains when you walk or run after you got out of the bushes. There are two chambers within the booster, the booster chamber (facing the master cylinder), and the pressure chamber (facing driver's seat). The unit itself is only three years old, and I did recently clean the outdoor unit coils, if that makes any difference. Had it serviced 3 weeks ago to have my battery changed and they didn’t tell me anything needs repair/serviced Dec 6, 2024 · A slight hissing sound near the evaporator coil is normal as the refrigerant passes through the expansion valve. I have a 2012 Chevy traverse and for the last few months the AC will make a “hissing noise” while running. Last summer I took my car to a mechanic because the AC wasn’t blowing air as cold as it should. The hissing is the inherent noise of the circuitry where you plug your IEMs to. Ac worked fine until today. Feb 15, 2023 · Why Your Air Conditioning Is Hissing. It sometimes happens while driving too. It came from middle of the dashboard. Members Online The sound is intermittent, and 1 day didn't happen at all. Radiator vent is probably too small or vent is clogged/broken. You first need to identify the issue, if the compressor works (usually makes a noise and often run by the same pulley as the alternator - check that). Today was my first day driving the car for an extended period to where I got to hear the sound in person. TPMS light on but it’s been on for awhile. It also makes a very loud hissing noise almost constantly, only when the AC is on. Any info would be greatly appreciated. Get the Reddit app Scan this QR code to download the app now This is more than a car repair forum! Members Online. It lasts a couple of seconds and goes away. They will be able to diagnose the problem and recommend the best course of action to take. Jun 21, 2023 · Common Reasons for Hissing in a Car’s AC Unreliable AC Compressor. First visit to dealer = leak and repair. Shortly thereafter we began having AC issues resulting in the noise in this video. It’s intermittent but it’s gotten worse over the past 2 weeks or so. Car makes gurgling and hissing/ gas release noise when AC is turned on or off. The air inside the cabin flows through the evaporator, which then cools the air. I've put in a work order and the maintenance man left a note saying nothing was wrong with the AC and the noise is normal. Sep 15, 2023 · In this article, we’ll explore the common causes of whistling noise in car AC, its effects on car performance, and how to fix and prevent it from happening again. Fast forward 4 months, I'm starting to hear hissing again. If it developed a short (lowering the resistance to near zero) it would increase the current draw, likely Oct 9, 2023 · Common Causes of Hissing Noise in Car AC. Some online searching pointing to low refrigerant. Contact an HVAC technician to inspect and, if necessary, repair or replace the valve. Especially if you have rear AC. We had something similar happen in our old house. Sounds so much cleaner. I definitely remember this noise from 4 years ago during our first summer in the home. 5 - Make sure to collect all the refrigerant into the balloon as it exits the liquid line. When I have the AC running I can hear a low pitch hissing/scratching noise. The air conditioning unit has a low-pressure side and a high Jul 4, 2023 · Hissing AC System: One of the common causes of a hissing sound is a problem with your car's AC system. However, the part that blows air out of your vents is called a blower motor. If you can only hear the hissing sound from your vents when the air conditioner is active, the sound is probably coming from your ductwork. As some one else mentioned, the ac does make a hissing sound as it's equalizing in the system after its turned off, but that's only if it was on in the 1st place, so with that being eliminated have you tried a smoke test? Or use needle nose pliers and pinch off vacuum lines one at a time. A couple of months ago I bought a 2010 Land Rover LR2 with the 3. The Fan blows but there is no cool air. My 2008 Mercedes A class w169 makes a hissing sound only when I turn on the AC and I TURN LEFT. I must say I never heard the sound from the compressor it self as I didnt let the car run with ac , and then hear if there is a hissing sound. Wanted to get some thoughts while I make the appointment The sound comes up when I start up the ac , and every other time I drive. 2015 Rallye at 124k miles. Without the AC on, there is no noise but with the AC on it creates that pressurized sound when I accelerate and decelerate sometimes. Come this spring, during a couple warm days I discovered that my AC was no longer blowing cold air. It’s great when driving on a scorching day, and your car’s air conditioning (AC) blows cool air. Cold air does comes out of the AC. When the pedal is not being pressed, both chambers are under vacuum provided by either a vacuum pump or the intake manifold vacuum from the engine. A bad ac pressure sensor and a leak from where the ac lines go into the firewall. Is/was anyone in this scenario? What'd you do? Sell the car? Fix the conpressor? Call Honda again? Interested to hear your guys' opinions. But if your AC makes a hissing sound in the car, that’s not good. If this seal/silencer begins to fail, air will be sucked from the cabin through this seal into the half of the booster that has normal atmospheric pressure. For the past 3 weeks my a/c has been making a hiss sound when starting up then goes away after about 4 seconds. I recently purchased a certified 2018 Honda CRV-EXL with ~20k miles on it. Thanks for posting on r/MechanicAdvice!Please review the rules. Luckily, this sound is pretty much harmless. DIAGNOSING YOUR AC before trying to repair it. I have an new car and the right side of the passenger vent after 2 weeks now has a hissing sound every 15-20 secs of driving(no sound when engine is idle). I also hear the hissing. Including compressor, all pipes and hoses, condenser, evaporator etc. May 26, 2018 · The hissing sound is most likely the refrigerant going through the expansion valve. Here are some common culprits behind the hissing noise: Refrigerant Leakage: One of the primary causes of a hissing Hey guys. Next best solution - If you have to convert it to analog and record it with a different device then do it at line level with a cable. Yes but indirectly. and remember to please post the year/make/model of the vehicle you are working on. And I hear a hiss behind the dash. I hear a hissing sound and see ice build up around one coil pipe. My hvac system is pretty old. Definition of the problem. Hissing noise is a sign of low Freon. That helped a bit, but didn't totally solve the noise. I diagnosed it myself. And still had issues. Jumped into the bios and disabled the on board audio and it instantly fixed the white noise. My 10th Gen Honda Civic has suffered a lot of AC issues. Take pictures, record video, send email, send text, and save all of these. Sounds almost like metal scraping together. Didn't find any solution to fix that. Just noticed after 2 weeks that when I turn the AC on, it makes a hissing / water bubbling kinda sound for 1-3 seconds and then sound disappears. This was because all the refrigerant had leaked out of the system. Also it goes away when the brake pedal is pushed. Does these observations mean that my AC system is failing again? Could AC Condenssor or Compressor fail within a month of repair? The sound should gradually go away over a couple minutes. When I try to turn on ac, I can hear compressor engage, but air isn’t cold at all. This is how the AC system works. It will do this when I'm on defrost, when I don't have any system on, when I'm parked, when I drive. Window Ac Making Hissing Noise. 3rd party warranties are notorious for their exclusions, but you are best placed to answer your own question by reading the terms and conditions. If you are not a member of the trade, please post in our Q&A sub, r/hvacadvice. Don't create a bad recording and then try and fix it. But hissing sounds can be problematic when they're continuous and usually signal one of these three issues: If it's hissing still, and you're still cooling, then it might be that you have a really dirty filter, dirty coils, and/or a leak in your ducts. After a couple of weeks the hissing sound from under the dash went away. Turned out to be 2 things. Would hiss and burble if I shut the car off with AC on. Sometimes when you turn the car off, there is a hissing sound. This is also what I used to hear before the previous conpressor went kaput. A hissing noise coming from your car’s AC system can be attributed to various causes. When I run the AC in my car you can hear a noticeable hissing sound from the air vent. If your window air conditioner is making a hissing noise, there are several potential causes Brand new ac installation (coil + ext. What should I do? Thanks for posting on r/MechanicAdvice!This is just a reminder to review the rules. I know constant hissing is bad but wondering if anyone had this issue and may know a fix? Hiss happens in Idle or Low speeds. Likewise, dirty coils could be restricting airflow and causing a hissing/whistling noise. Sorry if this is well known fact but hopefully it helps someone out. Heat works fine. Nov 14, 2024 · Regular AC Inspections: Recommend periodic inspections of the AC system to ensure refrigerant levels are maintained, which can help avoid issues like the hissing sound from car AC. I have had to add refrigerant in the past, but the system is cooling fine. By pressurizing the refrigerant, the compressor is essential to the cooling process. . The noise is from either low amount of refrigerant in the system, which happens because of a slow leak, or the noise is from too high temp in the system which happens if the radiator fan doesn't turn on together with the AC pump as it is supposed to, or the fan is old and running too slow. AC only gets cold or hot when the car is moving, not when it’s idling. the hissing sound is not there at all View community ranking In the Top 10% of largest communities on Reddit. Does the hissing sound cause for a concern? For now AC is cooling fine. After I flush it, the noise goes away for a bit, but comes back. Any ideas on what it could be? My car also does this, its been 2 year every time compressor kick in it has hissing noise inside cabin for 2 second and its gone. Prior to the charge (the videos are post charge) there was a distinctive intermittent "bubbling" noise that appeared to emanate from the area where the AC lines connect with the air handler. Elevator machinery is on top. Sounds like the noise a can of cold computer duster gas makes when you shake it. When your air conditioning unit is making a hissing noise and fails to cool your home, it indicates that there is a problem with the system. Once that was done, I started noticing a constant fairly high pitch noise I would call "sizzling". It sounds like gas is escaping. The hiss goes away after 1500RPM or accelerating normally. myvg gxcu imrpx yyqib rkas pjjcacr ukom ylzo kwmw zzyng orya dqtkujc xvpuh cxr wlpms