Can't turn extruder heater on with heater icon on Manual Control tab. All other icons works. For example bed heater is working as it works earlier. I can't connect occur of this problem with another event. Last time i use my printer it works well. The most strange thing that if i press Print from the Print Preview tab printer starts to heat bed and then it heat extruder and it works. I can turn extruder heater with gcode as well.
When i press extruder heater icon it prints ok but icon still crossed with red line.
I updated Repetier host few weeks earlier, but it works well.
I use 2.1.6 version and Sprinter firmware and i have never this problem earlier.