H1 problem

Hello, I have a Hyundai H1 and my problem is that the radiator water is emptied by the garage over where the car is filled and heated, someone knows to tell me why this occurs.

Hello ago, they can be several things:
1-That the thermostat butt does not open, because it is broken.
2-That the Board of Curate is burned and pass by the cylinders to the Refigure Circuit.
3-That the plug is in poor condition and escapes by the Board.
Check these points.

Thank you very much Ismael, I will look at the thermostat that I think is that.

You forget the radiated covered, the bisco in poor condition. But usually H1 is the thermostat if clear.

And it is true what Kikemec says, the radiator can have obstruction, but it gives me that it is doing the thermostat, it is also true that if the temperature rises a lot for not igniting the fan, (fuse, reluct, or burned engine of the fan), the pressure is so high, that it relieves by the expansion vessel. Surely everything comes from thermostat. Greetings!!