Hi I just finished to setup a new Original E3d v6 full kit and trying to do a PID autotune, (I have not print anything yet) but everytime I do the autotune I get a different value and some times the temp just reach 170 degree and stay there and the test timeout and fail. I`m doing the test with the main fan ON ( the fan that cool the plastic) using M303 S230 C5. My previous heater cartrige the one that came with my printer is 24v 40W but this one I received is 24v 30W. Should I made the autotune with the FAN ON or OFF ? My PID_MAX on the firmware is set to 255. thanks in advanced for any help.