Blowing cold...(part 2)

I heard a nasty whirring sound from the air-con unit when blowing cold. But those Denso compressors cost a small fortune from Porsche so went to Andy at A.C.R. in Chertsey to have the unit refurbished for a fraction of the cost - £150, which is a bargain! He said that the black oil wasn’t a good sign and that the entire system would need flushing to ensure there's no debris left in it. He also recommended changing the filter drier / accumulator, and to check the expansion values. Off to Northways to refit and regas :-)