Ac issue

wasya152 · 07-29-2022, 10:27 PM

So I've had this happen a few times on hot days. Normally, my ac gets cold enough and fan blows hard enough. Today driving, I noticed that the vents on full power didn't blow much air. It's like an internal register was shut. And the air didn't feel cold enough. I put it on manual and full power and didn't feel much air and it wasn't very cold. It was in full fan, but felt like it was on lowest speed instead. Parked the car, let it sit for few hours, tried again and bam cold air and on full fan blowing really hard. Is there an actuator or something that's maybe getting frozen stuck? I have CS, not sure if that makes a difference. I've had this happen before, and had my ac compressor pulley/clutch fail and replaced, but not suspecting like maybe this caused that. Hopefully the part is easy to get to and doesn't require like dash removal or something.

RoundelM3 · 07-30-2022, 07:36 AM

Your A/C system may be low on refrigerant and is "freezing up" - had this same issue on my 2015 M3. You can take it to a shop and get the system fully charged or buy a kit at the auto parts store (can of refrigerant with hose and gauge) and charge it yourself. There is also the possibility that the system is over-charged, which an A/C gauge will reflect and you can bleed out some of it to get it into the "green" zone on the gauge.

Redacre · 07-30-2022, 07:43 AM

Could be related to this TSB: https://www.tsbsearch.com/BMW/SI-B64-06-13

I bought part number 64119350495 and haven't had this issue since then.

wasya152 · 07-30-2022, 09:54 AM

Quote:

Originally Posted by RoundelM3

Your A/C system may be low on refrigerant and is "freezing up" - had this same issue on my 2015 M3. You can take it to a shop and get the system fully charged or buy a kit at the auto parts store (can of refrigerant with hose and gauge) and charge it yourself. There is also the possibility that the system is over-charged, which an A/C gauge will reflect and you can bleed out some of it to get it into the "green" zone on the gauge.

Unless it's leaking, I just had it refilled so I don't think it's the issue. Plus I figured they would also need to refill it when they warrantied the ac compressor replacement like a month ago. Will need to check if it's over pressure maybe

07-29-2022, 10:27 PM	#1
wasya152 Lieutenant 730 Rep 472 Posts Drives: ///M3CS Join Date: Jun 2010 Location: Chicago iTrader: (0)	Ac issue So I've had this happen a few times on hot days. Normally, my ac gets cold enough and fan blows hard enough. Today driving, I noticed that the vents on full power didn't blow much air. It's like an internal register was shut. And the air didn't feel cold enough. I put it on manual and full power and didn't feel much air and it wasn't very cold. It was in full fan, but felt like it was on lowest speed instead. Parked the car, let it sit for few hours, tried again and bam cold air and on full fan blowing really hard. Is there an actuator or something that's maybe getting frozen stuck? I have CS, not sure if that makes a difference. I've had this happen before, and had my ac compressor pulley/clutch fail and replaced, but not suspecting like maybe this caused that. Hopefully the part is easy to get to and doesn't require like dash removal or something. __________________ Current: ///M3CS Previous: E60 M5, E39 M5
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07-30-2022, 07:36 AM	#2
RoundelM3 Major General 1838 Rep 6,991 Posts Drives: 15 F80 M3, 22 G01 X3 30i Join Date: Apr 2010 Location: Clayton, NC iTrader: (2) Garage List 2022 BMW X3 [9.83] 2015 BMW M3 [6.50]	Your A/C system may be low on refrigerant and is "freezing up" - had this same issue on my 2015 M3. You can take it to a shop and get the system fully charged or buy a kit at the auto parts store (can of refrigerant with hose and gauge) and charge it yourself. There is also the possibility that the system is over-charged, which an A/C gauge will reflect and you can bleed out some of it to get it into the "green" zone on the gauge. __________________ 2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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07-30-2022, 07:43 AM	#3
Redacre 6 Cylinders 3 Ways 369 Rep 460 Posts Drives: M5, 911, Macan Join Date: Sep 2014 Location: FL iTrader: (10) Garage List 2019 BMW M5 [0.00] 2015 BMW M4 [0.00] 2015 Porsche Macan ... [0.00] 1986 Porsche Carrera [0.00]	Could be related to this TSB: https://www.tsbsearch.com/BMW/SI-B64-06-13 I bought part number 64119350495 and haven't had this issue since then.
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