Coffee runs by itself

Hi all ,
I own the Mink bona and have it since 2016
Have recently a maintenance of Kaffeepartner for a proud 380€ :angry. Anyway, I currently have the problem that when the coffee machine is on suddenly starts to make coffee. Quick cup underneath but somehow you can of course keep up with the fast. Have called coffee partner technician who said that if I make the ceilings in the inner room off are so metal strips each right uncertainty left stop for each variety. With me it shows imme Latte machiato what Automat ran. Have this time taken out the strip but makes the same again. Can someone tell me what it may be? A strip at Kaffeepartner costs a proud 63 € and then still proud mwst on it so somehow rip off until no longer goes