I´ll bought sensor #2 from a shop in Sweden just so I could check if this was the fault. The guy in the store told me to "boil" the sensor before mounting it, just in case.
Now I have boiled it and this sensor shows correct readings. I´m now were god at boiling sensors, so if any one wonders how its done, please let me know
But I didn´t get all the way so I could do a proper test, because my kids have made other plans for me.
