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    1. #1
      Senior Member Warpedcow's Avatar
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      S80 V8 AC noise

      How common a problem is this? My AC compressor makes a whining noise. Pitch varies with engine RPM and the noise goes away if the AC is shut off.
      It isn't ALWAYS noisy, but it's happened enough times that I'm hoping this is a known issue.
      I can try to take some video of the noise later. Car is CPO until September however I wonder if this symptom is enough for a fix...
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    2. #2
      Junior Member Synesis's Avatar
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      Mine's doing something similar.

      Only makes the noise after its been run and warmed up, then shut off for a few minutes (as when going in the store). Upon restart the whirring or growling noise is pretty loud (loud enough that passengers ask what it is). Sometimes the noise progresses from a growl to a metallic scraping noise. Turning off the AC by turning the fan all the way off makes it stop, but when turned back on the noise is either gone, or much quieter. A/C blows cold, works fine otherwise. In all cases the noise sounds like it coming from the area in back of the gauge panel. The colder the ambient outside temperature is, the less likely it is to do this; conversely, the warmer it is the more likely to do it.

      Theories on this after discussing with other car guys:

      Compressor: Blows cold and works fine otherwise, but why would it only have issues as described above.

      Thermal Expansion Valve. There is a Bulletin on this, but information is sketchy as to what the symptoms are, and its also for a different year than my 2007. Not sure why an expansion valve would only be faulty under the conditions described above.

      Serpentine Belt Idler Pulley. Possible, but again, can't explain why it would only be during conditions above.
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    3. #3
      Quote Originally Posted by Synesis View Post
      Mine's doing something similar.

      Only makes the noise after its been run and warmed up, then shut off for a few minutes (as when going in the store). Upon restart the whirring or growling noise is pretty loud (loud enough that passengers ask what it is). Sometimes the noise progresses from a growl to a metallic scraping noise. Turning off the AC by turning the fan all the way off makes it stop, but when turned back on the noise is either gone, or much quieter. A/C blows cold, works fine otherwise. In all cases the noise sounds like it coming from the area in back of the gauge panel. The colder the ambient outside temperature is, the less likely it is to do this; conversely, the warmer it is the more likely to do it.

      Theories on this after discussing with other car guys:

      Compressor: Blows cold and works fine otherwise, but why would it only have issues as described above.

      Thermal Expansion Valve. There is a Bulletin on this, but information is sketchy as to what the symptoms are, and its also for a different year than my 2007. Not sure why an expansion valve would only be faulty under the conditions described above.

      Serpentine Belt Idler Pulley. Possible, but again, can't explain why it would only be during conditions above.

      I have the exact same behavier with my S80 V8 from '09 here in Germany. It makes this noise from the A/C since 70.000km/45.000miles respectivily 5 years. The A/C works fines. The noise goes away after 30 to 60sec. It just appears after driving around, park the car for a few minutes or 1/2 houre and then starts the car again.

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    5. #4
      Moderator itwontstopsnowin's Avatar
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      I am getting a noise, but my noise is the bearings in the blower motor failing. I'm assuming that this isn't what you guys are hearing, because it is pretty distinct as it changes pitch based on the fan speed.
      Last edited by itwontstopsnowin; 04-09-2013 at 06:38 PM.
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    6. #5
      Member bd5400's Avatar
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      So...I've noticed a slight whine when the heater is on in my car (I haven't used my A/C in a very long time) and I've assumed it's just the blower motor. Interesting that several people have posted in a row about a sound. Mine is fairly quiet and I only notice it when I've stopped moving and I'm about to get out of the car. I'll have to give it a listen tonight and play around with the fan and the a/c switch to see if it changes.

    7. #6
      Junior Member Synesis's Avatar
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      The sound I am hearing does not track with the fan speed setting.
      Last edited by Synesis; 04-09-2013 at 09:07 PM.
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    8. #7
      Senior Member Warpedcow's Avatar
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      Quote Originally Posted by Synesis View Post
      The sound I am hearing does not track with the fan speed setting.
      Same here, my sound changes pitch relative to engine RPM. Fan speed doesn't change the sound at all (unless I turn the fan all the way off which of course also turns off the AC thus the noise stops).
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    9. #8
      Junior Member oystergray3.2's Avatar
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      I have the same thing going on with my 3.2. HVAC works fine but whirring sound from the compressor, noticeable at low speeds.
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    10. #9
      Junior Member Elfnmagik's Avatar
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      My policy is I don't worry over sounds unless they're violent and/or accompanied by performance problems.

    11. #10
      Senior Member Warpedcow's Avatar
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      Quote Originally Posted by Elfnmagik View Post
      My policy is I don't worry over sounds unless they're violent and/or accompanied by performance problems.
      That's my policy as well once I'm out of the warranty period.
      But I still have CPO until September so believe me if this sound is easier to reproduce in hot weather I will definitely take it in and try to get them to fix it free.
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    12. #11
      Junior Member Elfnmagik's Avatar
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      I feel that way more so when it's still UNDER warranty. If it's working I'm not letting the dealer near it. They've opened up a can of worms more times than I care to count when it comes to squeaks, rattles, whirrs, etc. If it's a rotational sound related to the A/C being on, then it seems it's either inside the compressor itself or related to the ancillary drive system that runs it. If the system is cooling fine, it doubtful they will replace any parts for a noise and in the least will tell you it's within specs and not to worry about it unless it no longer cools. Worse case they may try and quiet it by a quick fix method

    13. #12
      Senior Member Warpedcow's Avatar
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      Quote Originally Posted by Elfnmagik View Post
      I feel that way more so when it's still UNDER warranty. If it's working I'm not letting the dealer near it. They've opened up a can of worms more times than I care to count when it comes to squeaks, rattles, whirrs, etc. If it's a rotational sound related to the A/C being on, then it seems it's either inside the compressor itself or related to the ancillary drive system that runs it. If the system is cooling fine, it doubtful they will replace any parts for a noise and in the least will tell you it's within specs and not to worry about it unless it no longer cools. Worse case they may try and quiet it by a quick fix method
      Wow, you managed to find a dealer service department worse than mine!

      It may take some arm twisting but I'm pretty confident I can convince them that "they don't all make this noise" at which point it is considered "defective" which is all the criteria you need for a CPO fix. So they will probably just replace the AC compressor. Or at least they will do the stethoscope test to verify where the noise is coming from and replace whatever that is. Worst case, if they refuse I can try dealer number two and if that still fails, should the AC compressor seize or literally stop working, since I reported a problem within the warranty period with the AC that they failed to fix, so they still have to cover the fix after the warranty ends.

      My wife heard the noise very easily as well, maybe it's louder than some of the other folks here who haven't noticed it until they tried listening for it.
      Last edited by Warpedcow; 04-24-2013 at 11:00 AM.
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    14. #13
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      Your systems are low on AC refrigerant,refill and service them and the sound is gone.Yes cold air is coming but if the level is too low it starts to make that sound.Common problem.

      Refrigerant
      Volvo cares about the environment. The air conditioning system in your car contains a CFC-free refrigerant - R134a. This substance will not deplete the ozone layer. The air conditioning system contains 1.59 lbs (720 g) of R134a. The systems uses PAG oil.
      Last edited by tallaploomi; 04-27-2013 at 01:48 PM.

    15. #14
      Senior Member Warpedcow's Avatar
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      Quote Originally Posted by tallaploomi View Post
      Your systems are low on AC refrigerant,refill and service them and the sound is gone.Yes cold air is coming but if the level is too low it starts to make that sound.Common problem.
      That doesn't make sense to me... shouldn't it be noisy all the time if it is low?
      And it seems crazy that mine would be low with only 41000 miles on it when my S60R was a year older and had 122000 miles on it and I never had to recharge the AC in that time.
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      Its known problem in newer volvos 2007->.
      If this sound goes away when switching off AC and its changing with engine rpm and you can best hear it inside the cabin then your system is low.
      I had the same problem,refilled the system and now its gone.
      Last edited by tallaploomi; 04-28-2013 at 04:02 AM.

    17. #16
      Moderator itwontstopsnowin's Avatar
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      I have started noticing the sound that others have mentioned now. I always thought it was part of the engine note, since I always have my AC compressor running. The other day, I switched it off, and noticed the difference in sound immediately. I kind of wonder what it is, but after all of these miles of doing it, I can't imagine it's that big of a deal.
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    18. #17
      Moderator itwontstopsnowin's Avatar
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      Shouldn't the low pressure switch disengage the compressor if the system's refrigerant level is too low?
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      Obviously not because my system was running ok and was producing cold air on hot summer days.Thats why i didnt suspect that opportunity myself.
      But the garage where im servicing my car has a special machine for refilling AC system,it drains out the system from refrigerant and oil and refills it after.
      I had only 300g of refrigerant in the system and on the sticker under the hood its written that 800g is needed for refill.
      I was driving around almost a year with that strange sound and after a refill the strange sound is gone.
      Last edited by tallaploomi; 04-28-2013 at 04:04 PM.

    20. #19
      Junior Member Synesis's Avatar
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      tallaploomi: Thanks for the input on the subject. I am having a little trouble figuring out how that solution would fit with the symptoms I am seeing. For instance, why would it only happen in my car after the car is warmed up, and shut off for a while, and then restarted. Also, mine will stop if I turn of the A/C and turn it back on again. Did you see these specific symptoms before you added the refrigerant? Nevertheless, I'll talk to my tech friend and have him look at it, and will post back with the results. Its definitely the least invasive solution.
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    21. #20
      Senior Member Warpedcow's Avatar
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      So basically you're supposed to fill from the high pressure side, not the low pressure side, so the generic AC refill kits won't work at all.

      I actually have VIDA and DICE - do you know if DICE lets you measure the AC system to see if it's low?
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    22. #21
      Senior Member Warpedcow's Avatar
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      Is recharging the AC on these something that requires a dealer or is it an easy DIY?
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    23. #22
      Moderator itwontstopsnowin's Avatar
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      Though I am not familiar with the specific system in our cars, generally it is possible to add refrigerant with a kit available from any local auto parts store. You just need to find the low side service port on the system and use the kit which generally includes a gauge to help you achieve the proper level.

      I am somewhat skeptical of this diagnosis, and my AC is working properly, so I am not going to "mess" with it at this time. Nothing against tallaploomi, I just am afraid I'll open a can of worms. Everything is working well, and I can deal with very slight noise.
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    24. #23
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      If you dont want to open a can of worms and you want to get the best result,then you go to a garage where they know what they are doing and in the text that follows you will find the answer,why not to do it yourself at home with a can full of refrigerant like this http://0.tqn.com/d/autorepair/1/0/Z/5/-/-/ac-intro.jpg

      This is direct info from volvo vida.




      Refrigerant, draining

      Note! The recycling unit must have an oil separator. The oil separator must be of a type that allows the amount of run out oil to be measured.
      Note! The ambient temperature must be above 20°C(68 °F) when draining the system.
      When draining refrigerant, the recycling unit can be attached to the service valve for both the high pressure side (HP) (1) and the low pressure side (LP) (2) at the same time. This is the quickest method.
      Check the amount of oil (if any) that has run out when draining the refrigerant.


      Vacuum pumping

      Low pressure side (LP) service valve (2) is concealed under the plastic cover above the wiper well.
      During vacuum pumping, the vacuum pump (recycling station) can be connected to the service valves for both the high pressure (HP) (1) and low pressure (LP) (2) sides.
      Operate the vacuum pump for at least 50 minutes.
      The vacuum must be checked after vacuum pumping.
      Fill refrigerant directly after vacuum pumping. See below.
      Note! The vacuum test is not a substitute for leak tracing.


      Refrigerant, filling

      Only fill refrigerant on the high pressure side's (HP) (1) service valve (TXV system). A specification decal in the engine compartment indicates how much refrigerant the A/C system holds.

      Note! The most common causes of failed filling of refrigerant is incorrect vacuum pumping or because the pressure in the filling unit is not high enough, or a combination of these two.
      Note! The filling unit should preferably have a heating unit for refrigerant. This is so that the pressure in the filling unit is higher than in the system that is to be filled.
      Last edited by tallaploomi; 05-01-2013 at 06:34 AM.

    25. #24
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      Vida dice has no use here.

    26. #25
      Senior Member Warpedcow's Avatar
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      Quote Originally Posted by tallaploomi View Post
      Vida dice has no use here.
      According to this thread:
      https://forums.swedespeed.com/showthr...AC-maintenance
      The AC high pressure side is reported to the ECM so you can view it in VIDA with DICE.
      I'm going to check mine soon. Hopefully VIDA has some info about what a normal reading should be.
      I suspect that since the ECM does monitor AC pressure like this that if it really dropped out of spec it would throw a code.
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    27. #26
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      Well i found something related to this from vida !


      Programming the evaporator, climate control module (CCM)
      Programming
      Note! This adjustment must only be carried out on the vehicle if the owner requests it.
      The noise from the compressor can be reduced by reducing the level in the evaporator.

      In order for this change to be possible on model years up to and including 2008, the latest software must be downloaded to the Climate control module (CCM).

      Note! This programming is only possible on vehicles with more than 4 cylinders.

    28. #27
      Hi
      In case you haven't resolved this yet, I had exact same issue with my v8 and it all went away after replacing the AC compressor.

    29. #28
      Senior Member Warpedcow's Avatar
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      Quote Originally Posted by Thehandshake View Post
      Hi
      In case you haven't resolved this yet, I had exact same issue with my v8 and it all went away after replacing the AC compressor.
      Good to know. Was it a warranty thing?
      I'm going in for an oil change and a fix to my AM antenna on Friday and I will mention this noise as I still have CPO through the end of the month.
      Any tips on what to say in order to get a covered replacement?
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    30. #29
      Junior Member Synesis's Avatar
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      Thanks for the info. Will be a great help to the tech.
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      Mine makes a growling or whining noise, only with the AC on. It does not occur all the time. It seems more frequent when driving surface streets, or warm-starting after the vehicle has been parked 20-40 minutes. On freeways (higher road and engine noise aside) it does not happen. The noise does follow RPMs. I have brought it into Rusnak Volvo twice. On both occasions the service advisers heard the sound, and on both occasions the "technician" could not find the problem... one tech sat in my car and would not hear the problem. He kept fiddling with the AC and fan controls...they just want to get out of doing the warranty work. I may live with the sound for a while until an AC compressor or something blows.

    32. #31
      Quote Originally Posted by SINCGARS View Post
      they just want to get out of doing the warranty work. I may live with the sound for a while until an AC compressor or something blows.
      That's what they tried with me also and suggested to wait until it breaks. My argument was that it if it's noisy = it's already broken.

    33. #32
      Junior Member Synesis's Avatar
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      I took tallaploomi's advice and had my tech check the freon level. It was only marginally low but he filled it to the recommended level anyway. I have not had the issue since.
      Thanks!
      Another curious thing about my symptoms was that this only occurred in cooler parts of season. Over summer it went away but returned as soon as temps started getting cooler. Maybe this might help others troubleshoot this issue as opposed to other A/C issues.

    34. #33
      Moderator itwontstopsnowin's Avatar
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      Quote Originally Posted by Synesis View Post
      I took tallaploomi's advice and had my tech check the freon level. It was only marginally low but he filled it to the recommended level anyway. I have not had the issue since.
      Thanks!
      Another curious thing about my symptoms was that this only occurred in cooler parts of season. Over summer it went away but returned as soon as temps started getting cooler. Maybe this might help others troubleshoot this issue as opposed to other A/C issues.
      Glad to see you posting again. I was just thinking the other day that you haven't been around here in months, and was starting to get concerned. Welcome back!
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    35. #34
      Junior Member Synesis's Avatar
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      Nov 2004
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      Franklin, TN
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      Quote Originally Posted by Synesis View Post
      I took tallaploomi's advice and had my tech check the freon level. It was only marginally low but he filled it to the recommended level anyway. I have not had the issue since.
      Thanks!
      Another curious thing about my symptoms was that this only occurred in cooler parts of season. Over summer it went away but returned as soon as temps started getting cooler. Maybe this might help others troubleshoot this issue as opposed to other A/C issues.
      The growling has now returned. Grrr. I guess my next approach will be to have it checked for leaks and/or change the expansion valve. A/C works fine, but I am wondering if its an harbinger of things to come...
      2004 XC90 2.5T AWD Ice White 2007 S80 V8 Electric Silver 2011 XC60 T6 R-Design Ice White 2012 S60 T6 R-Design Saville Gray

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    36. #35
      Junior Member Synesis's Avatar
      Join Date
      Nov 2004
      Location
      Franklin, TN
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      924
      Quote Originally Posted by Synesis View Post
      I took tallaploomi's advice and had my tech check the freon level. It was only marginally low but he filled it to the recommended level anyway. I have not had the issue since.
      Thanks!
      Another curious thing about my symptoms was that this only occurred in cooler parts of season. Over summer it went away but returned as soon as temps started getting cooler. Maybe this might help others troubleshoot this issue as opposed to other A/C issues.
      Noise is back now that warmer weather is here. grrrr. I guess the next step will be to have system checked for leaks and/or replace expansion valve. A/C works fine; but I worry its an harbinger of things to come...
      2004 XC90 2.5T AWD Ice White 2007 S80 V8 Electric Silver 2011 XC60 T6 R-Design Ice White 2012 S60 T6 R-Design Saville Gray

      S60 Sojourn - S60 R-Design Information, Reference, and Build Thread

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