Climate compressor magnet does not switch

Hello I have a renault scenic 2 Diesel 2007 1.9 cdi 135 ps 197000 km So my old climate compressor got stuck and thus the kailribenroemen torn / melted Have bought and built in a used climate compressor. I got out the climate fluid at atu, and after installation again. Unfortunately the compressor does not want to switch or stop the magnet. They had told me that it could be that the fuse is broken. I have all fuses next to the battery on The inside left next to the handlebars are also good. Climate capacitor is new, pressure switch is new. Does anyone have an idea what the problem could be. And make me a solution proposal. Thanks ??