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In recirculation mode, air from the cabin is sucked in by the blower motor that is passed through the HVAC unit back into cabin. The choice is based on user selection based on which the flap near the blower motor is adjusted to fresh air mode or recirculation mode.


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Thank you Both. Apparently the Kseal had clogged up thermostat. A simple thermostat change with radiator flush and new coolant fixed the problem. There were no signs of HG damage but the mechanic said one thing very useful. "TIME WILL TELL". Mechanic suggested the below. - Change the thermostat & Coolant - Check the Water pump and radiator fan - HG ...


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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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In case you had the engine off while the fans were on, your car was in the "ON" state, which powers all the electric systems of your car. The fans were consuming most of the power which have drained the battery very quickly. You've started your car right on time to retain just as less energy as was needed to get your engine running again. The smell you ...


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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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If you suspect the head gasket, you should immediately change the oil. If it doesn't look right (it will look "creamy" or "milky" if there is any coolant in it) you should immediately stop driving it and get the head gasket replaced. You may also be able to tell simply by checking the oil dipstick, but I'd recommend draining the oil and replacing it as a ...


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As you know the coolant is suspect, I'd begin with a full system drain, flush and refill, and check it all properly at the same time (rad, hoses, thermostat and pressure test). Thermostats can be tested by dangling them, and a thermometer, in a pan of water and gradually heating it to the appropriate temperature, then checking that the stat opens. See if ...


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The problem could be that the glow plug relay is going out. If it is intermittent, the glow plugs will heat sometimes and other times not. I don't know if this is a known issue with BMW diesels, but it is plausible this is your issue.



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