pitza Posted January 7, 2012 Share Posted January 7, 2012 HI, why is the alternator on my Mondeo whistling when the front windscreen heater is on? Quote Link to comment Share on other sites More sharing options...
fishpond 47 Posted January 7, 2012 Share Posted January 7, 2012 simple, the heated screen takes a lot of amps out of the battery to work so fast, which in turn puts a lot of load onto the alternator, put the heated rear on at the same time and the whinning goes even deeper sounding, it's nothing to worry about it's doing it's job Quote Link to comment Share on other sites More sharing options...
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