How can I service my electric radiator fan which is noisey and will not turn off and runs immediatly I turn on the ignition I hail from Australia and am not yet use to posting yet thanks for any help

You need to out which relay is causing the fan to run & then decide if the issue is
in the relay OR caused by a faulty temp sensor.

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Also be aware if your defrost or A/C switch is at the "on" position then the cooling fan is automatically engaged. It doesn't matter if the A/C or defrost cab fan is running.

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