Whining noise from AC-unit at startup

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30 April, 20197 yr

I have noticed a slightly whining noise from the air con as it starts up. Disappears after a while, not sure if correlated to starting driving. Cooling is good but not tested during outside heat lately.

I have experienced the same noise in a BMW 325i when it was low on refrigerant, however in this car the sound was constant.

The car is a MY17 with 45000km so would be surprised if it would need an ac service already.

Anyone else with the same problem or any ideas?

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