Automatic air conditioning Laguna K 56

Hello everyone, for a long time the automatic air conditioning system has been spinning in my ́96 he Laguna (1.8 RT) : Sometimes it works for days – yes for weeks without problems, suddenly it doesn’t want any more. (I had already posted here last summer – maybe one or the other still remembers…). Last year I had started the following experiments : pressure switch and dryer bottle renewed, refrigerant drained and refilled, operating element renewed (fairly said, The operating element (actually both…) was tested for cold soldering points, several workshop visits (both at Renault and at Bosch) survived (there was actually only my wallet evacuated), and at some point, when I had given up all hope (it was also slowly autumn and the air conditioning was no longer sooooo necessary…) it worked again, until… well, until it was in the last week of the year. I am in the end with my Latin – do you have advice ?? Thank you for your answers, a sweaty Tilliman