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I've recently purchased Anet A8. First print went well, but now, the hot end temperature stays at ~230 °C. When I touch it, it is still cold. I tried the thermistor, and it correctly changes resistance when I blow on it (from 100 kΩ to ~70 kΩ). The voltage in connector is about 300 mV.

Does anybody know what could be wrong?

1 Answer 1

In my case, I had a bad resistor on my board. R41 had only 2.2 kΩ instead of 4.7. I replaced it and everything works now.