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  • [Corsa D] Fan

    2007 1.2 16v corsa just brought and worried that have not heard fan turn on yet it spins freely by hand and just messing about with car running unplugged the sensor by thermostat and fan kicked in straight away does that sensor need replacing sorry if this been covered before

  • #2
    Welcome to the Forum.

    The engine cooling fan normally only runs when the engine temperature is too high.
    Normal running temperature is about 90 C
    There are three stages at which the fan will operate, depending upon temperature.
    The fan is controlled by three relays (K30A; K30B and K30D) all being fed from fuse 52 and the relays being controlled by the temperature sensor.

    I'm not sure why the fan should start when you removed the sensor plug (was the engine hot or cold when you did this?) - But at least you know that the fan motor is OK.
    Did the fan stop running when you plugged the sensor back in?

    Regards

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    • #3
      Car cold ish plugged back in fan continues to run until car switched off

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      • #4
        Very strange!
        If the fan started running again when you next started the engine (from cold), it MIGHT indicate a sticking relay, but this id something of a coincidence.
        Do remember that the fan does NOT normally run at low temperature, so it may be that there isn't a problem at all.
        The fan will normally cut in, for example, on a hot day, when you are standing in traffic with the engine already hot.

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        • #5
          First priority was to make sure the fan working all good on 20 minute test drive just found it strange didn't hear fan once maybe that's ok not having temp gage in car I would prefer a heads up if getting hot but will have to let car look after itself unless red warning light ever comes on everything else fine water levels fine heat from blower fine etc etc thanks for reply

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          • #6
            As walksall says the fan should not normally run unless the engine is getting a bit too hot, such as in stop /start traffic or idling for a long time on a hot day or a very long hill climb. My Corsa D 1.3 cdti cooling fan doesnt often kick in at at any other time than these.

            If your fan is now running all the time even when the engine is cold then this is also a fault that needs rectifying. An over cooled engine may not reach its full operating temperature which can affect lubrication and fuel consumption.

            This may be a faulty temperature sensor , or maybe its connector terminal is giving a false reading due to contamination with oil or corrosion. You may have altered this reading when you disturbed the terminal by removing and replacing the plug.

            A rough and ready way of checking if the fan will kick in when it should, without having to take temperature readings, is to chose a warm day, and leave the car idling while stationary. The fan will probably cut in eventually. If it does not then further investigation may be required. But dont drive for the test. The airflow from moving may be all the cooling the engine needs so the fan never needs to start anyway.

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            • #7
              one more fan related question heater controls in car only work on 123 not 4 is that the resistor under the glove box that needs replacing ?

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              • #8
                Its the other way round!
                When the control is set to number 4, all of the resistors are by-passed, so it wouldn't matter if they were intact or not. Only on settings 1,2, and 3 do the resistors come into the circuit.
                As yours works on 1,2,and 3 but not on 4, I would suspect that the switch contact on number 4 is in poor condition (dirty?) - Rather odd, as most people don't use position 4 very much.

                Regards

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                • #9
                  Its usually the other way round. Heater fan working only on postion 4 , when the heater resistor plays up. Stick your head under the glove box , in the centre at the back you will see the 4 wires going to the heater resistor. See if the biggest wire has not melted, for position 4 . Very common where the heater control is left on postion 4 most of the time , and burns the wire out.
                  you can use the hinded menu to see the temperature of the engine. Start the car up and press the trip button on the dash four times , on the fourth time keep it pressed in for about 10 seconds. And you will see the numbers change. Once they change release the button . Now press the button again about 4 or 5 times for the temperature option . The temperature will stay there until you turn the ignition off. Then you've got to do it all again.

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                  • #10
                    Just an update . To see the temperature while driving you'll need option 7. Eg . Press the trip button 7 times , instead of 4 or 5 as I said .

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