re: A/C Unit - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 10-18-2006, 08:40 PM
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Question re: A/C Unit

Hi guys,
I'm new to this forum and have a question..I just bought a 2004 Sapphire Black 525i and so far love the ride..However, there is one problem that I am wondering..Does the a/c take several minutes to blow out cold air when the engine is cold?? When I start it in the morning and turn the a/c on, it blows out fan air..After several minutes, the cold air will kick in and I have no problems after that..Is this normal?? Please don't suggest the iDrive climate or the manual controls..It is set and I don't touch it..So there is no problem with it..Remember, the a'c blows fan air then the compressor will kick in and then cold air will blow but after several minutes..Any ideas?? is this normal on the E-60??
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#2 (permalink) Old 10-19-2006, 11:29 AM
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I would assume that is normal. Air conditioners usually aren't instant - it takes some time to get the evap. nice and cold.

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#3 (permalink) Old 10-19-2006, 07:37 PM
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So I am assuming yours take several minutes to get cold?? I know it's not instant cold air, especially on a hot day, but to take minutes?? That's unusal I think..I have a 97 Acura 3.2TL and it doesn't take that long..So that's why I was wondering if it was normal for a BMW..

What about everyone else's BMW??used:
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#4 (permalink) Old 10-19-2006, 08:47 PM
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This is considered normal system operation. When the vehicle is parked for extended periods, liquid refrigerant can migrate into the compressor. It may take up to 2 minutes to displace the liquid refrigerant from the compressor before starting normal operation.

Over time liquid refrigerant can drain back into the compressor when the vehicle is parked. If the A/C system were to function at 100% right from startup the compressor would be damaged. The system is then started up gradually to prevent this from happening and extending the life of the compressor. Normally the system is functioning at 100% after 30-60 seconds, but in extreme conditions it may take up to 2 minutes for the system to function at 100%.

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