When I said that the C.A.C. was toast I meant it must have been leak because the entrance and piping were all a bunch of muddy stuff. So I replaced it. Thanks for the tip: I'll check the circulationpump. Somebody already told me to also check the fuse and the output of the Pulse Module. I would think that if this is the problem would not occur only sometimes (like in 50% of the time)?

Regards .... Han