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General E46 Forum
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Old 06-29-2016, 03:58 PM   #1
countrybimmer
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Join Date: Jun 2016
Location: maryland
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My Ride: 323i
Air from A/C System not cold

My A/C will not put out cold air from vents. I have had system checked and everything is charged and working but they cannot get cold air. The air is cooler than outside but not enough to be feel cool in car.

I did notice this winter that I would have to turn heat off or it would get too hot when in auto like the air temperature coming from vents was always on high and you just adjusted fan speed...not sure if connected but seem like they could be.

Any help or suggestion would be greatly appreciated.

2000 323i

Last edited by countrybimmer; 06-29-2016 at 04:00 PM.
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Old 06-29-2016, 04:54 PM   #2
joegr
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Perhaps your heater valve is not closing all the way? Does the AC cool correctly for a few minutes when you start the car for the first time of the day? Otherwise, you may need to find a better "they" to look at the system.
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Old 06-30-2016, 01:12 AM   #3
Anub!s
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Old 06-30-2016, 06:44 AM   #4
countrybimmer
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The dial works fine. Thank you I saw a ton of people did not know what that did.
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Old 06-30-2016, 06:46 AM   #5
countrybimmer
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Quote:
Originally Posted by joegr View Post
Perhaps your heater valve is not closing all the way? Does the AC cool correctly for a few minutes when you start the car for the first time of the day? Otherwise, you may need to find a better "they" to look at the system.
How do I check the heater valve?
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Old 06-30-2016, 07:25 AM   #6
markusmarkus
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The heater valve is located on the left (intake side of the engine bay) inner fender. Here's a diagram of the parts: http://www.realoem.com/bmw/enUS/show...diagId=64_0822. The heater valve is item #4. It's open unless it's getting 12VDC. That voltage comes from the climate control module in the dash. Hose #5 in the diagram goes to the heater core in the dash. It should be cooler than the other hose at the heater valve. Check to see if 12VDC is present at the connector from the wiring harness.

The valve can become corroded and not function properly. There's a thread on this website that shows how to disassembly, clean and reassemble the valve.
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