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Hi guys, I have an 00 323Ci and when I got it it need
ed the cooling system replaced. So I replaced it and the fan to. Sadly I think I went with an afterror market replacment. The problem I'm having is that it never turns on. Not when I turn ac on or when it gets hot. I checked the fuses today and they both are good. I tried to disconnect the temp sensor but I don't know which plug that is and if I recall correctly when we installed it the car was sending 12v, but can't be certain. Any help is greatly appreciated.
 

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The temp sensor for this is in the lower radiator hose. I would start by replacing the sensor.
 
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