A/C not blowing - I hear the fan and feel cold air but it seems blocked - Bimmerfest - BMW Forums



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  #1  
Old 06-01-2015, 09:02 AM
stulondon stulondon is offline
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A/C not blowing - I hear the fan and feel cold air but it seems blocked

2013 328i F30

I got into my car today and the air is not working. The fan is running. I hear it respond when I change the speed settings. Cold air is coming out of the dash, but it is very weak out of the vents. I tried changing from top to middle to bottom vents. I also closed some vents and reopened. No joy.

Thanks in advance for any advice you can lend.

My cabin filter has not been changed for about a year / 30k miles. Could that be the issue?
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  #2  
Old 06-01-2015, 10:24 AM
KneeDragr KneeDragr is offline
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No if the filter was literally blocking it, no air would come out of the dash either. More than likely whatever valve mechanism that opens/closes the vents is broken.
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Old 06-01-2015, 10:25 AM
Michael Schott Michael Schott is offline
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Quote:
Originally Posted by stulondon View Post
2013 328i F30

I got into my car today and the air is not working. The fan is running. I hear it respond when I change the speed settings. Cold air is coming out of the dash, but it is very weak out of the vents. I tried changing from top to middle to bottom vents. I also closed some vents and reopened. No joy.

Thanks in advance for any advice you can lend.

My cabin filter has not been changed for about a year / 30k miles. Could that be the issue?
I doubt it. Did this happen suddenly? Set your climate control to Auto and if it doesn't work see your dealer. What year is your 328?
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Old 06-01-2015, 10:49 AM
u3b3rg33k u3b3rg33k is offline
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I've had my HVAC ice up once (in my 530) and it did what you're describing, but that was with the "soft" auto program active and after 6 hours of driving on 80/90 on a really humid day. it had iced up. if yours is doing this right on startup, then you don't have this problem.
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Old 06-01-2015, 10:52 AM
stulondon stulondon is offline
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It just started this morning. It is a 2013 with 77k miles. I did try setting it to Auto. No change. Looks like I need to take it into the shop.
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Old 06-01-2015, 10:54 AM
Michael Schott Michael Schott is offline
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Sorry to hear of this. Please let us know what the dealer finds. I was going to say this is a warranty issue but unfortunately not at 77K miles.
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Old 06-01-2015, 01:41 PM
BobinIl BobinIl is offline
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This happened to us last fall while on a road trip. After trying everything in-cabin, I shut the car off, restarted and the HVAC started working again. No problems since. it was a one time event. The dealership said to bring it in and they'd check to se if there was a fault code, but I didn't do it since it's been working normal since.
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Old 06-02-2015, 06:28 AM
stulondon stulondon is offline
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It fixed itself just like what happened to BobinIl. I tried shutting the car and restarting yesterday morning but that did not work. However, after the car sat all day while I was at work it is now working again. Thanks for everyone's comments. Hopefully, I won't be back on this issue.
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  #9  
Old 06-03-2015, 04:12 AM
John MS John MS is offline
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I wonder if a vacuum motor on an air handling door has failed.
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  #10  
Old 07-25-2016, 07:30 PM
colinmaxwell81 colinmaxwell81 is offline
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Hello y'all!!

This happened to me this weekend, I took a road trip [drove for 7 hours at around 90+ weather] the AC was still kinda cold but it was not blowing, I could hear the fan blowing hard but it sounded like it was coming from the top vents.

I stopped and grabbed some food while I checked the car and when i started it back up everything was back to normal.

Did anyone find a solution or the reason for this?

I was worried the car was overheating, what temp do y'all usually run at? I noticed when the AC stopped working the car was right on the middle [250] when it's usually in between the 160-250 range.
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  #11  
Old 10-08-2017, 06:54 AM
jk_arl jk_arl is offline
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same thing happened on my 2014 435i Convertible

same thing happened yesterday. I drove the car ~300 miles in a warm (90 degree) day with a decent level of humidity. Stopped for about 1 hour. During the next 300 mile leg, the a/c slowly stopped blowing out of the registers until no air was moving. You could hear the blower running at every speed selected. Stopped for a few minutes (< 15). Everything worked fine when I restarted the car. No problems for the next 2 hours of the drive. Thoughts?
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  #12  
Old 10-08-2017, 08:00 AM
John MS John MS is offline
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Probably iced over. Next time you use ac be sure to have the fan on highest setting with the system set on auto.
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  #13  
Old 10-08-2017, 08:04 AM
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Doug Huffman Doug Huffman is offline
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IHKA has a temperature detector dedicated to the evaporator outlet temperature that should defeat the compressor to prevent the evaporator going below ~3įC, to prevent just this hypothetical icing.

Learn how IHKA is supposed to work. The compressor/evaporator is ALWAYS fully loaded except to prevent icing, and for power control at idle and at WOT.
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Old 10-08-2017, 09:37 AM
John MS John MS is offline
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The theoretical event described above has been written about by others in other threads. The description and resolution are much like the non-theoretical evaporator icing I've experienced. The IHKA may be operating using a different theory than the one described. Or maybe it just ain't workin' the way the theoreticians hoped.

Last edited by John MS; 10-08-2017 at 09:38 AM.
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Old 10-08-2017, 12:26 PM
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Quote:
Originally Posted by jk_arl View Post
same thing happened yesterday. I drove the car ~300 miles in a warm (90 degree) day with a decent level of humidity. Stopped for about 1 hour. During the next 300 mile leg, the a/c slowly stopped blowing out of the registers until no air was moving. You could hear the blower running at every speed selected. Stopped for a few minutes (< 15). Everything worked fine when I restarted the car. No problems for the next 2 hours of the drive. Thoughts?
Our 2014 328i did this exact thing ..... replaced the cabin filter plus started setting AC on auto .... has not recurred since.
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  #16  
Old 12-25-2017, 08:18 PM
S.Adham S.Adham is offline
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Sorry to bring up this one again..

I kinda have a problem like anyone else above. Aircond working well.. But after long dring 2-3 hours, the aicond starts weakened. When i increase the blower power, i did hear the sound of blower getting louder, but the aircond was very weak. But its cold as usual.

What seems to be the problem? Blockage? Need to change filter? And what filter? Or might be anything malfunction?

After so much thought still cannot brain this..

New member here
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  #17  
Old 12-26-2017, 06:59 AM
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laser laser is offline
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replace your cabin air filter!
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  #18  
Old 12-26-2017, 10:11 AM
Original_Quinn Original_Quinn is offline
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AC not blowing from vent

I've had this happen to me twice and out of no where. I tried adjusting the AC every which way with no response. The only thing that fixed it was turning off my car for awhile then when I turned it back on, it was fixed. I have chalked it up some sort of short in the valve that controls the opening and closing of the vent for the dash. Let me know if you find anything out.
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  #19  
Old 12-26-2017, 10:22 AM
GTIto328i GTIto328i is offline
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Iíve had this happen to me. Took it to a dealership in the middle of a road trip. Dealer confirmed there is a problem with the 3 series which causes it to freeze - especially happens if you have both front and rear vents turned on.

He said something about a replacement part and some coding, but since I was on my trip, did not follow thru. Local dealership would not work on it, since they cannot replicate the issue. Pretty ridiculous.

If this happens to you, turn off the car and/or A/C for about 20-30mins and itíll start working again.
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  #20  
Old 08-12-2019, 10:20 PM
Cprtt8 Cprtt8 is offline
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Hi, I have a 2003 z4 3.0i that is doing the same thing. I can hear tge blower running but there is no air coming form the vents. I turned the car off and let is sit for about 30min and it started working fine again. One day the door locks didn't want to function properly and I shut the car off for a while then the worked fine again. Maybe the computer needs to completely shut down before re starting. Has anyone found a cause for this?
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  #21  
Old 08-13-2019, 09:37 AM
John MS John MS is offline
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You really should ask about your car in the appropriate forum.
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  #22  
Old 08-13-2019, 11:14 AM
Cprtt8 Cprtt8 is offline
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Would you care to be helpful and point me to the right forum? As mentioned I am having the same issues as discussed in this thread so this is not the right forum?
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  #23  
Old 08-15-2019, 08:47 AM
John MS John MS is offline
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Bimmerfest groups similar models together in a forum for discussion purposes. Your car is identified by BMW as an E85 or 2004 Z4. The forum below includes E85 and E86 models.

https://www.bimmerfest.com/forums/fo...play.php?f=186
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  #24  
Old 08-18-2019, 01:30 PM
Stevenym4 Stevenym4 is offline
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2017 M4 convertible, same issue. Just turned car off, will restart it in a half hour to see if the issue corrects itself.
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  #25  
Old 08-18-2019, 03:16 PM
namelessman namelessman is offline
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Forum posts have reported similar issues, one cause can be the AC being ON for a long time(e.g. a few hours during long drives) and ice is formed.

BTW my old E39 had an AC issue in which no cold air came out. It was diagnosed as faulty final stage unit(blower resistor) and was fixed under warranty.
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