Hi guys I have a 300tdi auto and the ac worked well when I bought it I then did the manual pump conversion (mine had cable accelerator to start with) ever since my ac hasn't worked when I press the ac button the fans click in but compressor doesn't I've checked the relays and when I power the wire in the ac relay it all works as should not sure if it clicks in and out with temperature but compressor works does anyone know of what or how to fix this please ?