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I'm not exactly positive about the BMW, but would assume it's just like any other car. The A/C uses the same fresh air locations as the rest of the system. When in recirculation mode, the air is forced to go back through and into the cabin interior with little air being drawn from the outside. In order for the air to be cool (when going through the A/C ...


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From this PDF, it shows the difference and it's pretty easy to see. This is the IHKA control in the e46. It is an automatic control. This is the IHKR control in the e46 (with the radio above it). It is a manual control.


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Here is what solved the same problem for BMW E39: Cause: The smell is due to bacteria in the air-duct. Solution: To solve it you need something with antiseptic action to eradicate the bacteria. There are many Antibacterial Cleaners for Automobile Ventilation System, however, I used simple and cheap pharmaceutical Salicylic alcohol 2%. Procedure: empty ...


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Air Vent Odor This issue is bacteria in the ventilation system. this is not related to charging the air conditioning system as some have indicated. They are seperated systems and you do not get freon in your cabin by using the air conditioner. The ONLY way to attack the problem IMO, is to; remove the vents from under the dash and clean them out. ...


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As far as I understand it, your pollen filter is filthy and should be cleaned or replaced.


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The best way is to fight the problem, not the symptoms. Lysol only lasts for a while and the bad smell will return eventually. The AC is the cause of the bad smell and you should refill the AC system. I don't know for sure, but the gas you might need could be Freon. Check the vehicles owner manual to be sure though. Before you get started, put your car on ...


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The Problem can be with the engine not getting enough ventilation. Problem: In your car the ECU is programmed to raise the rpm when it detects a stall or the RPM dropping down so if there is problem with your air filter which is not allowing much air into the engine and causing a stall but not noticeable your ECU will fight it to keep it in working ...


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That sounds like normal behavior. Under load, most cars will disengage the A/C compressor clutch to provide more power for acceleration.


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Get a used compressor on Ebay for $25. Slap it in and add some refrigerant. You're done. Garage quoted me $800 for just the labor. Nonsense.


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Ask them how much to tighten all of the fittings on the system. My limited experience is that after time things become loose as opposed to failing. The exception being seals in the compressor itself....


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It seems to me that leaving the AC on while starting the vehicle would be harder on the starter motor rather than the engine. I say Urban Myth....but, who am I to disagree with your friend...


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I would suggest your refrigerant is low and needs a recharge. It can get to a point where there is enough for the A/C to kick on, but not enough to actually cool it for very long. When the system sits idle, the refrigerant will equalize in the system between the low/high sides. When in this state, it will cool the interior of your car for a short period of ...


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I suspect 2 things. Check the switch/fuse that runs the ac. Possible fault frm there. Or Check the compressor. If its old, change it



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