Question about 2000 Ford Focus

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I have a 2000 ford focus, the fans arent kicking on when they are suppose to. i have changed the thermostat, and its not the sensor because it shows my car is over heating. my car only overheats when im idling. the car didnt over heat as long as i had the heat on 4. the inside heat and a/c stopped working shortly after as well. is this the resistor or is it the radiator that needs flushed?

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A quick fix that will make sure your car does not over heat is to unplug the sensor (the one located in the head just infront of the alternator)and when you start the car both fans will run. this is only a quick fix mind you but its better than blowing your engine.

Posted on Jul 20, 2013

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Hi :) If its the head sensor the temperature gage should either not be moving at all or staying well to the "cold" side of its range. To answer your question though, yes...the head temperature sensor does turn the radiator fans on, albeit indirectly through the ECU. Once the computer sees the head reach whatever temperature correlates with the coolant being 190C it turns on the radiator fans as this is the temperature at which the stock thermostat opens.

If you are having fan problems, its a good bet the resistor pack that lets one fan run slower than the other is cooked...a quick test of this is turning on the AC, if the resistor pack is working the high-speed fan should turn on. If not both fans should stay off. Your temp sensor is a long pin that screws into the back of the head, on the passenger side, just above the alternator or the coolant sensor is behind/under the intake manifold on the zetec.The radiator fans have a resistor in between them that also controls the fans.
Here is a picture of the sensor.http://focus.c-f-m.com/fordcoolanttemperaturesensorfor00-04focuszetec.aspx

Posted on Mar 26, 2011

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You should have a fuse in front of fan's plug is in front of motor. Make sure car is shut off befor checking. good luck.

Posted on Mar 26, 2011

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