Need help

hi

I finished building my new printer .at first The Printer worked fine but once i wanted to clean the Nozzle.
While cleaning the Nozzle the Thermistor has a circuit to the ground and shows 643C° as temperature.
I tried to fixed this error and now the Thermistor shows 2C° temperature.
the printer won´t start. the Repetier shows an error:
Printer stopped due errors. Fix these errors and use M999 to restart.

I checked the wires and the power supply and they are fine.

When I give an order to move the printer engine .it write in written “idel” area; that it “waits for 5 command”. and yet does nothing , however when I press the HOME marks , the surface does moves to his place . Clicking on the fan also operates . But the attempt to turn the heater or controling the angine. fails
i tried to reconect the printer and i pressed the start b in the top right of the command boat. yet nothings happend.

How can i fix this problem ?

Unplug the wires from the middle position on the green connector
Check the resistance on the wires.
You should see about 100K at room temp.
From your description it sounds like you have a short.

thanx.
ill try this.
hope you right.