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Recently, I started experimenting with new filaments on my Ender 3 V2. I got a spool from here.

This is PETG filament and I started dialing in the temperature to run a smooth print. I found on my V2, if I run the filament around 240 °C, it prints very smoothly and the extruder doesn't jitter or distort the filament during printing.

However, I found after the printer was printing for about an hour it had reduced its hotend temperature to 210 °C and the print went bad! I have a stock hotend for the V2. Any thoughts as to why the temperature would have reduced itself?

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  • $\begingroup$ Welcome to 3DPrinting.SE. The printer does not change the temperature without a corresponding instruction. Check if your G-code contains temperature reduction instructions. Did you have similar problems with a previous print? Is this the first time you are printing with PETG? Are the settings in your slicer correctly set? $\endgroup$
    – Molitoris
    Apr 13 at 11:37
  • $\begingroup$ IMHO the answer for this question is found here, and as such a duplicate, please find out if your printer has Thermal Protection enabled, read for details this answer. $\endgroup$
    – 0scar
    Apr 14 at 9:20