Renault Laguna noise from a/c

are you sure the noise is coming from the a/c compressor.it could be a worn ancillary pulley such as pas or alternator.it seems unlikely that 3 a/c compressors would be faulty,you have another problem

thank you 2145 simon but i have chacked the pulley and they say that is good the noise by the way is stronger when the temperature i high 27C and lower when is about 20C-22C and the noise came out only when the compressor is engaged and you are speeding up i have seen as i said to you all the block from the side of the compressor except the dynamo -- the pomp of water and the tighter of the belt

Have you had a look at this similar problem: noise from a/c

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when you had the new compressors fitted,was the pag oil put back in the ac system,renault air conditioning system have to be regassed correclty or the compressor will get knackered,if the ac system has a thermal expansion valve then check this is not faulty