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E46 General discussion and technical help for 1999-2004 3 series cars.

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Old 01-30-2010, 09:48 AM   #1
glsche

Name: glsche
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Heater/AC Fan Speed Fluctuates

I have a 2002 325i that, when cold, the heater/ac fan speed fluctuates faster-slower-faster-slower, etc. Once the car warms up, the fan speed settles in to whatever speed is called-for by the computer and the problem goes away. That is, until the next time I start the car from "cold". I've heard of this happening with others but didn't pay much attention to how to fix. Any know how to fix? Thanks.
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Old 01-31-2010, 11:54 PM   #2
newtuner

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Search for Final Stage unit, it's the resister that controls the fan blower motor.
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Old 05-17-2010, 01:16 AM   #3
MANYUMA

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Your Ride: 2002 e46 320i
Your problem is the final stage resistor or the fan blower resistor (same thing different names), get that replaced and presto! you will have control of your A/C again.
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Old 08-18-2011, 12:46 PM   #4
diet

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hi i hav same problem is the resistor known as the (hedgehog) and if so isit easy job to do on the e46 and isit on the drivers side footwell cheers

Last edited by diet; 08-18-2011 at 01:02 PM..
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