Here’s a doozy. I recently had a petg print fail while I was away and my hotend assembly on my ender 3 V2 was filled with filament. I was able to heat it up and peel away a lot of the filament at first but somewhere along the way I pulled the two small wires attached to the screw on the hot end (which I’m assuming are the thermistor wires) out with some filament. My printer now freezes up when I go to heat the nozzle. I purchased a new hot end from creality because there was too much hard plastic to replace the thermistor wires. I had to replace all the wiring for the hot end as well. Now two more problems arise. First, with all the wiring plugged in as I found it the machine gets stuck on the boot up screen. I found that if I unplug the white wire at the top of the stack on the motherboard I can get past that screen but I get the same old issue when trying to heat the nozzle. Does the top plug control the thermistor? Why is it freezing with everything plugged in correctly?
Why is this exactly my problem and no one has responded. I did read someplace that the thermistor wire may be shorting out from the screw being too tight on the hot end, but I won’t know 'til i try. I didnt mess with the torque since i figured creality must have done it correctly…
I just bought a new hot end from Amazon and I have exactly the same issue. If the thermistor (plug with white wires) are plugged in the Ender 3 v2 gets stuck on the boot screen (Creality logo). If I unplug it then the printer starts fine but I can’t print without the thermistor connected!?
Ok I just managed to fix it. Turns out one of the wires on the brand new thermistor was shorting out which caused the startup to freeze. I unscewed the screw that was holding the thermisitor on the hot end. One of the sleeves on the wire was split so when I screwed it in the thermisitor wire was shorting against the hotend. I fiddled with it to try get the wire to stay in the split sleeve which sorted the problem. It’s pretty useless to run into this for a brand new part. I’ll be leaving feedback.
Anyway I’m printing again! Hopefully this helps someone.