AC not working?

GeorgiaTech335coupe · 07-08-2011, 01:58 PM

I went out of town for a week and left the car parked in the garage. When I get back the AC was not working. It was completely fine before I left, but now for some reason the evaporator fan is not blowing at all. If I turn the speed up to MAX, I still won't feel anything coming from the vents. I changed the 3 fuses (5A, 10A, 40A) associated with the AC according to the little chart in the glove box, but still no luck. Any ideas? Anyone else have a similar experience?

Going to try to setup a service appt, but we will see how that goes considering I'm FBO.

Brey335i · 07-08-2011, 02:07 PM

Your fan is broken I believe.

I had almost the same issue, my fan was blowing, but the air wasn't cold.

cn555ic · 07-08-2011, 02:09 PM

Maybe rats at through your harness? Anything is possible

cn555ic · 07-08-2011, 02:20 PM

Maybe rats at through your harness? Anything is possible

jlcolon2001 · 07-08-2011, 02:34 PM

Quote:

Originally Posted by GeorgiaTech335coupe

I went out of town for a week and left the car parked in the garage. When I get back the AC was not working. It was completely fine before I left, but now for some reason the evaporator fan is not blowing at all. If I turn the speed up to MAX, I still won't feel anything coming from the vents. I changed the 3 fuses (5A, 10A, 40A) associated with the AC according to the little chart in the glove box, but still no luck. Any ideas? Anyone else have a similar experience?

Going to try to setup a service appt, but we will see how that goes considering I'm FBO.

It might sound silly, but people have reported that when your car battery charge is running low, the "smart" charging system shuts down non-essentials devices like your a/c and rear defroster. If you want to give a try use the search to find more info about it.

GeorgiaTech335coupe · 07-08-2011, 02:37 PM

Quote:

Originally Posted by jlcolon2001

It might sound silly, but people have reported that when your car battery charge is running low, the "smart" charging system shuts down non-essentials devices like your a/c and rear defroster. If you want to give a try use the search to find more info about it.

I've driven the car since, so I'd assume that the battery has a good charge. Also, the battery isn't more than a year old.

G.I.Joe · 07-09-2011, 02:28 AM

Maybe the fan not blowing is a consequence of something else?

I suggest you have your AC system coolant level checked. For reference: My car is 3½ years old with ~53k miles on it and I just had my AC systems serviced a month ago. According to the sticker inside the hood, there should be 590 grams of coolant (gas) on the system, but there was only 235 grams left. My system however was working, but not cooling nearly as well as now. I had no leaks, so it was emptied and fully refilled. Now it cools a lot better. I asked what would have happened if I hadn't had the system serviced before all the coolant had gone, and I was told that the system would have seized to work alltogether. Hope that's not the case for you, but it is worth checking out I think.

WOPALX · 07-09-2011, 05:31 AM

Mine decided to stop cooling the other week. Had it regassed and all good.

bahn stormer · 07-09-2011, 09:37 AM

The first things I would check are:

1. Does Compressor Clutch engage when A/C is turned on?
2. Does Radiator/Condenser fan turn on when A/C is turned on?
3. Any codes?
4. Buy a recharge kit with a pressure gage and check that.

07-08-2011, 01:58 PM	#1
GeorgiaTech335coupe Lieutenant Colonel 81 Rep 1,883 Posts Drives: Black BMW 335i coupe Join Date: Mar 2007 Location: USA iTrader: (0)	AC not working? I went out of town for a week and left the car parked in the garage. When I get back the AC was not working. It was completely fine before I left, but now for some reason the evaporator fan is not blowing at all. If I turn the speed up to MAX, I still won't feel anything coming from the vents. I changed the 3 fuses (5A, 10A, 40A) associated with the AC according to the little chart in the glove box, but still no luck. Any ideas? Anyone else have a similar experience? Going to try to setup a service appt, but we will see how that goes considering I'm FBO. __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(e90post.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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07-08-2011, 02:07 PM	#2
Brey335i Banned 118 Rep 4,771 Posts Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX iTrader: (11)	Your fan is broken I believe. I had almost the same issue, my fan was blowing, but the air wasn't cold.
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07-08-2011, 02:09 PM	#3
cn555ic 462 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	Maybe rats at through your harness? Anything is possible
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07-08-2011, 02:20 PM	#4
cn555ic 462 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	Maybe rats at through your harness? Anything is possible
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07-09-2011, 02:28 AM	#7
G.I.Joe Major 30 Rep 1,041 Posts Drives: E92 335i 2008 Join Date: Nov 2009 Location: Copenhagen, Denmark iTrader: (0)	Maybe the fan not blowing is a consequence of something else? I suggest you have your AC system coolant level checked. For reference: My car is 3½ years old with ~53k miles on it and I just had my AC systems serviced a month ago. According to the sticker inside the hood, there should be 590 grams of coolant (gas) on the system, but there was only 235 grams left. My system however was working, but not cooling nearly as well as now. I had no leaks, so it was emptied and fully refilled. Now it cools a lot better. I asked what would have happened if I hadn't had the system serviced before all the coolant had gone, and I was told that the system would have seized to work alltogether. Hope that's not the case for you, but it is worth checking out I think. __________________ E92 335i 2008 Space Grey 6MT \| Pure Stage 2 turbos \| Motiv PI \| Trueform Tech Intake \| Quaife LSD \| M3 Suspension kit \| Öhlins Road & Track Coilover \| DEFIVfab N54 diff lockdown kit \| COBB PTF E85 Map \| Fuel-It Stage 3 LPFP \| NGK 5992 plugs \| Wagner FMIC \| Wagner 3" DP \| Milltek exhaust \| Tial BOV \| SPEC Stage 3+ clutch \| SPEC Steel SM Flywheel \|
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07-09-2011, 05:31 AM	#8
WOPALX Lieutenant Colonel 92 Rep 1,993 Posts Drives: 335i Sedan Join Date: May 2007 Location: Sydney, Australia iTrader: (2)	Mine decided to stop cooling the other week. Had it regassed and all good. __________________ Vishnu PROcede V5 \| VK Motorworks FMIC \| AR Design OCC \| Forge DV's \| Bilstein PSS9 \| M3 Lower Control Arms & Caster Rods \| Quaife LSD \| HiTech Exhaust \| BMW Performance Illuminated Door Sills \| BMW Performance Gear Selector & Boot \| BMW Performance E-Brake Cover
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07-09-2011, 09:37 AM	#9
bahn stormer Lieutenant 11 Rep 529 Posts Drives: 07 E90 335i 6MT, 65 MGB Join Date: Feb 2008 Location: PA iTrader: (3)	The first things I would check are: 1. Does Compressor Clutch engage when A/C is turned on? 2. Does Radiator/Condenser fan turn on when A/C is turned on? 3. Any codes? 4. Buy a recharge kit with a pressure gage and check that.
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