Hi guys, I haven’t found this particular problem here yet. My cooling water circuit works perfectly. But when I start the SH, I guess after a time there’s such a strong pressure that it pushes the coolant out of my moose above. Statement from Bosch and Schrauber: The SH has a temperature switch that only connects the small SH circuit with the big one at a certain temperature. Then the pressure is already so high that it comes to the above result. And d of course, the pressure can cause any line to burst before. Has any of you ever had this before? And who is the culprit? The pressure regulator? The temperature regulator? LG Stefan