A/C not blowing - I hear the fan and feel cold air but it seems blocked - Page 2 - Bimmerfest - BMW Forums



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The sixth generation BMW 3 Series Sedan F30/F31/F34 and the first first generation 4 Series Coupe F32/F33/F36. Get the latest 3 and 4 series pricing from our ordering and pricing guide sticky thread.

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  #26  
Old 08-19-2019, 06:24 AM
Stevenym4 Stevenym4 is offline
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Works fine today
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  #27  
Old 08-19-2019, 10:35 AM
imtjm imtjm is offline
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common issue with evaporator icing up. let it sit and it should thaw out then work again. Another thing you could do is to have your BMW dealer reprogram the AC temp threshold. We shipped a car to Taiwan and had the same issue, since it is very hot and humid there. The dealership there reprogrammed the AC Temp threshold, and we haven't had any issues since.
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  #28  
Old 08-19-2019, 11:49 AM
Stevenym4 Stevenym4 is offline
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I’m not sure. I had my wife read this whole thread before parking the car while we were driving back home. I intentionally parked the car in our garage which is tiled and completely dry. No water EVER showed up on the floor. If it was ice melting... wouldn’t water show up on the floor?
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  #29  
Old 08-19-2019, 02:37 PM
imtjm imtjm is offline
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Quote:
Originally Posted by Stevenym4 View Post
I’m not sure. I had my wife read this whole thread before parking the car while we were driving back home. I intentionally parked the car in our garage which is tiled and completely dry. No water EVER showed up on the floor. If it was ice melting... wouldn’t water show up on the floor?
no
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  #30  
Old 08-19-2019, 04:34 PM
Stevenym4 Stevenym4 is offline
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Originally Posted by imtjm View Post
no
Wow. Wish I could get ice like that for my drink cooler.
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  #31  
Old 08-20-2019, 08:42 AM
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quackbury quackbury is offline
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It takes very little ice to freeze up your coil. Just like it takes very little ice to ruin the laminar flow over an airplane wing. And when the ice on your coil melts, it likely evaporates.

Trust imtjm's advice. He knows what he is talking about.

Oh, and a contributing factor to a coil icing - whether in a home system or an automotive system - is often low Freon. Given how the lines are routed in your car, it's possible / probable that you have a slow leak from a puncture caused by road disease. If the system doesn't work properly after you let it sit for a while, have your dealer or indy check your Freon level.
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  #32  
Old 08-20-2019, 09:51 AM
namelessman namelessman is online now
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There were also forum posts that said changing clotted cabin air filter can maintain optimal air flow and help with preventing ice formation.
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  #33  
Old 08-22-2019, 03:30 PM
Cprtt8 Cprtt8 is offline
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Sorry if I am in the wrong thread, but so far not much info on the z4 thread I started. I tried changing the controls, fan speed, temp and so on, but nothing fixed it. I replaced my cabin air filter 2 weeks ago. I am thinking it is an electronic problem, maybe the condenser temperature sensor or computer? When it happened yesterday I drove to a doctor appointment arrived around 11am a/c worked fine on the way there. Went back to the car at 2:30pm (3 1/2 hours later) and the fan turned on but no air from the vents. I turned the car off for 10 minutes to clear the computer bus system and upon restarting it worked just fine. As it did in the past. The thing is that I have to wait at least 10 minutes for the computer to reset. If I simply turn the car off and immediately restart it, it doesn't fix it. Unfortunately I don't know mechanically what happens to allow the vents to shut off all air flow from them even though the fan is running properly. Is it a flap or shutter that gets closed by the computer? Thanks
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  #34  
Old 08-23-2019, 07:06 AM
imtjm imtjm is offline
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don't know what you mean by no much info on your issue, since there have been some suggestions. As I noted, common issue is freezing up. That will exhibit the symptoms you are describing. You can have the dealership reprogram the AC temp threshold. The issue could also stem from a bad blower resister, blower regulator, blower motor unit.
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  #35  
Old 08-23-2019, 10:01 AM
John MS John MS is offline
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Does it happen with the fan on and ac off? If not I would bet on the coils freezing up. The first thing to check is whether the fan is set to maximum speed. The controls, settings and arrangement of vents and air doors may differ from the F30... series. That was why I referred you to the model specific forum.
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  #36  
Old 09-10-2019, 06:38 PM
Vbisbest Vbisbest is offline
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I this just happened to me as well. 2015 328i. Same symptoms, long drive with 95 degrees. Ac stopped blowing through the vents. One thing to add, if you turn off the AC, the air will starts flowing again at full strength after about 30 seconds. Then when I set AC back on it starts to blow cold for about 1 minute and then the air starts to fade away again until barely anything is coming out. Perhaps that's a helpful clue.
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  #37  
Old 09-13-2019, 05:50 PM
kaupuku kaupuku is offline
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2015 BMW 328i SULE AC not blowing cold air but heater works

Hi All, I have 2015 BMW 328i SULE F30 model. I am having problem with AC not blowing cold air but heater & blower motor are working fine. I hear compressor is kicking and compressor wheel is spinning. I have replaced AC EVAP temp sensor, AC compressor with OEM from BMW, replaced cabin air filter, recharged with right amout of freon from AC shop. Still having issues with AC not blowing cold air. Any advise will be helpful.
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