Air con whining noise starts after about 10 minutes

2010 Citroen C3 Picasso, 1.6HDI 16V Exclusive (110)
Car: Citroen C3
Year: 2010
Variant: Picasso, 1.6HDI 16V Exclusive (110)
Categories: Leaks & Noises
I have had no problems with this car, and have the aircon on Auto all the time, as is recommended. However, since about 3 months ago a whining noise starts, usually after about 10 minutes of driving. The noise stops when I turn off the aircon, and restarts if I turn it back on. It is really irritating. Any ideas anyone? I have googled this and not found any similar problems reported. Many thanks
Problem added: Aug 25, 2016 (7 years ago)
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