I could solve it by disabling the agitator motor- but now I can not do SPME anymore. Was told to replace the whole GC board on the AS (cost 5000€). Google shows a lot of people have the same problem. Would be good to know how many we are. My old CombiPal from 1995 still works without any problem, others from 1998, 2003 are also fine. The one with the problem is from 2011.