Hi Lapolvora, Skihi here,
@ wich temp the alarm goes on?
Our SWT Skandic V800 rrecently developed beep beep, red coolant light and yellow motor light while making trails where very little snow was moving. So,, I gathered two handfulls of snow, with the mitts, and applied to the front of the radiator. Very soon all three warning signals vanished. No extra liquid appeared in the overflow container, so I think everything is under control, and the motor did not get too hot. Skihi!!