Hi, Hothead #1 heats up as soon as power on, raises to 270C won’t tuen off and can’t control via touch screen. Hothead #2 working fine as is bed. Any pointers.
With the power off try disconnecting the endstops and power back on to see if the issue is still there.
Also try swapping the hotend heater connections on the board, if the problem jumps to the other hotend then it's board related, if the issue remains on hotend #1 then it's the heater cartridge/thermistor that needs replacing.
With the power off try disconnecting the endstops and power back on to see if the issue is still there.
Also try swapping the hotend heater connections on the board, if the problem jumps to the other hotend then it's board related, if the issue remains on hotend #1 then it's the heater cartridge/thermistor that needs replacing.