On switch on my Ender 3 with firmware V1.0.7 shows a nozzle temperature of 522 degree cemtigrade and refuses to print with an error message of “Nozzle is too lowperature” while squealing.
Please tell me how i repair this.
Have you checked the temperature sensor (thermistor) in the hot-end? Maybe the wires to it are damaged or disconnected somewhere between the control board and the sensor. Or maybe thermistor itself is damaged somehow.
[CoreyPDX] had a good suggestion. If you have a spare you can hook that up without installing it, to see if it shows a normal reading. You could also check the Ohm reading on the one installed, I can tell you exactly what the reading should be, but not open or short. If this is a stock hot end it should be a very inexpensive replacement. You might also try the old firmware. If that does not have an error, maybe a firmware problem
Thank you. I have replaced the hot end as the old one was quite covered in goo and I could not see an easy method of just replacing the thermister. All good now and thanks to all for the suggestions.
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Glad you got it running again. It is worth having a spare if you plan on using it for a long time. This is one of the parts that can have a sudden death.