<p>I am looking for troubleshooting help on my printer. Recently the hot end just can muster the courage to go past about 70 °C.</p>
<p>The hardware - Ender 3V2 with a E3D V6 hot end. 24 volts</p>
<p>I changed the thermistor to a new one. Before heating, it registers an appropriate 10 °C in line with the bed temp sensor.</p>
<p>With the thermistor checked good, I looked at the heater element. It is reading 22 Ω. The documentation from E3D is not clear in what wattage heater I bought, but if it is a 30 W 24 V heater, it's on the high end of acceptable.</p>
<ul>
<li>A 24 V 30 W heater cartridge will read between 16.7 - 22.6 Ω.</li>
<li>A 24 V 40 W heater cartridge will read between 12.3 - 15.1 Ω.</li>
</ul>
<p>If anyone is able to confirm how to know what my heater wattage is supposed to be, LMK. Options are shown for blue wires, red wires, and yellow. I have yellow.</p>
<p>If the resistance is in spec, I checked if the voltage being supplied to the heater is correct. It is reading 23.6 V which seems good.</p>
<p>I have attempted to PID autotune in Pronterface which I had also done several times previously before the issue. If I try to target anything over 70 °C, the attempt to tune fails because it can't get hot enough. I can tune if I set the temp to 65 °C by comparison.</p>
<p>The temperature trace in Pronterface shows the temp rising quickly through the 30s, 40s, then plateauing and maxing out in the high 60s.</p>
<p>I am looking for advice on where to look next for trouble shooting. Seems odd to suddenly have such a low temperature limit capability that I can't root cause.</p>

[{'answer_id': 19086, 'author': 'R.. GitHub STOP HELPING ICE', 'author_id': 11157, 'author_profile': 'https://3dprinting.stackexchange.com/users/11157', 'pm_score': 2, 'selected': False, 'text': "<h2>TL;DR:</h2>\n<p>Print more PLA on top of them, and pull it off together.</p>\n<h2>Preparation</h2>\n<p>First, of course, clean it well with IPA. This will both ensure there's no oil or other material on top of the PLA that will prevent it from bonding well with new PLA, and start to work underneath it to get it loose.</p>\n<h2>Printing</h2>\n<p>Then, print! Do a 2- or 3-layer square covering the whole buildplate if you need to, or just smaller ones in the affected areas. They should bond to whatever is there and pull it up when you peel them off.</p>\n<h2>Prevention</h2>\n<p>To avoid this happening in the future, <strong>fix your bed leveling</strong>. The type of tracks that are nearly impossible to remove by themselves normally come from printing with the nozzle so low that the material is forced entirely between the texture irregularities of the build surface, with no significant layer on top, and this means your bed is at least a whole layer-height too high relative to the nozzle.</p>\n"}, {'answer_id': 19108, 'author': 'Kilisi', 'author_id': 31811, 'author_profile': 'https://3dprinting.stackexchange.com/users/31811', 'pm_score': 0, 'selected': False, 'text': "<p>If you can feel it with your finger, then you can scrape it off. Just be careful. Keep the scraper closer to horizontal and don't dig in. It doesn't really need much effort.</p>\n<p>If you can't feel it with your finger then it doesn't matter. Just clean as normal and carry on printing over it.</p>\n"}]
['https://3dprinting.stackexchange.com/questions/19106', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/33537/']