It's an intergas VSM, overheat and low water switches are fine, measured them and there's no resistance so the circuit is closed and should function...

There's no resetswitch on it, low water has happened before and I was always able to restart is without problems.

Have taken ir off the mains several times as well, fuseblock is fine, theremocoupling used to burn because pilot was set too high in the past but I've tried 2 and they're both fine when measured for millivolts.

AAAARRRRGGGHHH!!!!!!