Answer to: Display show P1 message?Duracraft DD-TEC10NE: I take some pictures. Control Plate: http://www.fotos-hochladen.net/uploads/wp2017012518zkew6b... Hydro-Stat-Modul: http://www.fotos-hochladen.net/uploads/wp2017012518rn8y0a... Temperature Sensor: http://www.fotos-hochladen.net/uploads/wp20170125180obkr5... To open that device you need a normal cross screwdriver and for one srew you need a torx srewdriver with torx 10. Update (28.01.2017): To repair the p1 error you have to replace the Hydro-Stat-Modul. I do that and it works fine for me. Also you could only replace the hydro sensor on the old plate. If you only want to replace the hydro sensor it would costs only 8,93€ + shipping costs Why have I do that because my warranty had come to an end for one year so - I don't want to repair his device from the producer for a lot of money etc. and because it's fun to repair something yourself.