a/c system squeal when first turned on

#1
Hi, I had the air con in my signum re-gassed the other day and now that its working nice and cold I have been using it the past few days with it being a tad warmer, I have noticed that sometimes (not every time) that when the a/c pump first kicks in there a squeal from under the bonnet, apart from that it works fine, any ideas ?

Cheers
 

KevinH

Senior Member
#2
You'll probably find that the noise is coming from the bearing on the pulley of the A/C compressor. When you turn the A/C on, the compressor engages and the auxiliary belt turns the pulley. If the A/C has not been run for quite a while this is likely to contribute to the noise - also maybe worth checking the belt for any cracks.
 
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