# PETG not extruding at all **URL:** \ **Category:** U1 Troubleshooting guides\ **Created:** [August 7, 2026, 4:41am UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887 "2026-08-07T04:41:02Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![mushisushi](https://avatars.discourse-cdn.com/v4/letter/m/a88e4f/32.png) [@mushisushi](https://forum.snapmaker.com/u/mushisushi)\ **Post date:** [August 7, 2026, 4:41am UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/1 "2026-08-07T04:41:02Z")
Trying to test out PETG on the Snapmaker U1 for the first time. Loaded a generic PETG and selected the Generic profile for PETG on the device. Went to slice and print a small part and noticed nothing was getting printed. Default nozzle temp was set to 255. I attempted to heat the nozzle to 300, then use the touchscreen controls to extrude the filament but I can hear that the filament is not moving and the extruder is slipping on the filament. I retracted the filament, cut off the end that had the gear marks, and tried again with no luck. Also tried cleaning the nozzle, didn’t look like anything was stuck inside. Am I doing something wrong? ---
**Author:** ![CrazyIvan](https://avatars.discourse-cdn.com/v4/letter/c/7bcc69/32.png) [@CrazyIvan](https://forum.snapmaker.com/u/CrazyIvan)\ **Post date:** [August 7, 2026, 7:25am UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/2 "2026-08-07T07:25:36Z")
I had no trouble at all printing PETG after PLA. I might expect more problems the other way around! It might not look like anything is stuck inside the nozzle, but what you describe is symptomatic of a clog. Look harder! ---
**Author:** ![Wyphorn](https://avatars.discourse-cdn.com/v4/letter/w/ebca7d/32.png) [@Wyphorn](https://forum.snapmaker.com/u/Wyphorn)\ **Post date:** [August 7, 2026, 8:32am UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/3 "2026-08-07T08:32:54Z")
While extruding with 300 (just use 260°), push the filament hard into the head by hand. When there shall be small clog, this is the way I solve this on U1. Disassembling the nozzle is a pain on that machine 🫣 ---
**Author:** ![VItasG](https://avatars.discourse-cdn.com/v4/letter/v/d78d45/32.png) [@VItasG](https://forum.snapmaker.com/u/VItasG)\ **Post date:** [August 7, 2026, 3:25pm UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/4 "2026-08-07T15:25:57Z")
> [@mushisushi](#): > > First attempt to test PETG material on the Snapmaker U1. Loaded a spool of generic PETG and selected the generic PETG profile on the device. > > When slicing and printing a small part, I found that nothing was being printed. The default nozzle temperature was set to 255 degrees. > > I tried heating the nozzle to 300 degrees and then used the touchscreen to control the filament extrusion, but I could hear that the filament wasn’t moving, and the extruder was slipping on the filament. I retracted the filament, cut off the end with the gear marks, and tried again, but to no avail. > > I also tried cleaning the nozzle, and it appeared there was no clog inside. > > Am I doing something wrong? The temperature is too high. I usually set it to 230-232°C and make sure to keep the fan running continuously. With four hotends, you can also swap one out to see if the issue lies with the extruder mechanism. ---
**Author:** ![ni42](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/ni42/32/33566_2.png) [@ni42](https://forum.snapmaker.com/u/ni42)\ **Post date:** [August 7, 2026, 6:09pm UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/5 "2026-08-07T18:09:46Z")
There is good chance this is a clog, try same filament on different toolhead and see what happens. ---
**Author:** ![Gramps-Too](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/gramps-too/32/30364_2.png) [@Gramps-Too](https://forum.snapmaker.com/u/Gramps-Too)\ **Post date:** [August 7, 2026, 6:21pm UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/6 "2026-08-07T18:21:53Z")
I know you’re trying to print with PETG, I would try printing with the same tool head using PLA. If it extrudes okay then I’d say the issue might be your roll of PETG. Almost sound like it’s smaller than 1.75mm in diameter. For a clog you could try a cold pull following the directions on the wiki. A tool like this in good for removing clogs 3D Printer Cleaning Filament Clog Tool with Wood Handle,The Must-Have 3D Printing Tool.Diameter 1.6mm, Length 150mm.Removable Needle, Reuse The Handle (1) [Amazon.com](https://a.co/d/04zgD6LI) ---
**Author:** ![mushisushi](https://avatars.discourse-cdn.com/v4/letter/m/a88e4f/32.png) [@mushisushi](https://forum.snapmaker.com/u/mushisushi)\ **Post date:** [August 7, 2026, 10:24pm UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/7 "2026-08-07T22:24:27Z")
Thanks all for the responses. Spent some time disassembling the hot end and found a clog deep inside the hotend.I’m guessing the clog was created when I switched from PLA to PETG and some remaining PLA was still in the hotend causing it to seize. The piece was stuck far inside and I also couldn’t push it from either end with the hotend pin. flipping the pin around, then heating the handle end to push it into the input end of the hotend to hopefully melt some of it and pull it out. That worked at first, but the second time around it got stuck and when I pulled too hard, the metal pin broke inside. Luckily I still have the replacement hotend from the package, but that just means I’ll need to order more right away as a backup. Hopefully this was just a one-off event and doesn’t happen that often. Lots learned, printer is functioning again, hopefully it’ll be smother going forward. ---
**Author:** ![ni42](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/ni42/32/33566_2.png) [@ni42](https://forum.snapmaker.com/u/ni42)\ **Post date:** [August 11, 2026, 6:57pm UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/8 "2026-08-11T18:57:08Z")
@Gramps-Too How do you use that clog poke thing? I have one too but unable to effectively use with U1. It can directly go from top of hotend as its thick enough that it wont pass extruder gear, cant really use it after taking nozzle off as nozzle need to be hot. Do you like use external heat to nozzle or something? ---
**Author:** ![hho](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/hho/32/30857_2.png) [@hho](https://forum.snapmaker.com/u/hho)\ **Post date:** [August 11, 2026, 7:47pm UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/9 "2026-08-11T19:47:32Z")
How can it not pass the extruder gears if it’s thinner than filament? ---
**Author:** ![ni42](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/ni42/32/33566_2.png) [@ni42](https://forum.snapmaker.com/u/ni42)\ **Post date:** [August 11, 2026, 7:48pm UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/10 "2026-08-11T19:48:40Z")
it is not thinner than filament, its a thick buoy. lol ---
**Author:** ![mushisushi](https://avatars.discourse-cdn.com/v4/letter/m/a88e4f/32.png) [@mushisushi](https://forum.snapmaker.com/u/mushisushi)\ **Post date:** [August 11, 2026, 8:02pm UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/11 "2026-08-11T20:02:38Z")
If the hotend is still assembled, you can try heating it, then using the poker to go from the bottom up and see if you can unclog it. I had no luck as the piece of filament seems to be above the hot section of the hotend. I was unable to poke it from the top through the extruder gear. I couldn’t see it clearly, either it simply hit the gears or it hit the clog but wasn’t able to push it down. Once I disassembled the hotend, I could see the hole clearly and see the clogged filament. Flipping the pin around to and heating the pin handle allowed me to push down on the filament and melt it enough to pull out. But the second time I did it, the pin handle got stuck and broke inside the hotend. So overall, I wouldn’t recommend it unless you’re out of options. ---
**Author:** ![Gramps-Too](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/gramps-too/32/30364_2.png) [@Gramps-Too](https://forum.snapmaker.com/u/Gramps-Too)\ **Post date:** [August 12, 2026, 6:42pm UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/12 "2026-08-12T18:42:02Z")
Remove the PTFE tube the heat the problem hotend to 250° C Hold the extruder gear open Push the tool down through the hole, filament should start oozing out. Push the tool down until it bottoms out in the hotend. I then follow up by extruding some cleaning through the hotend. ---
**Author:** ![ni42](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/ni42/32/33566_2.png) [@ni42](https://forum.snapmaker.com/u/ni42)\ **Post date:** [August 12, 2026, 7:00pm UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/13 "2026-08-12T19:00:32Z")
What do you mean keep the gear open? By pressing that lever? I don’t think it will pass even with that. Will try it. ---
**Author:** ![hho](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/hho/32/30857_2.png) [@hho](https://forum.snapmaker.com/u/hho)\ **Post date:** [August 13, 2026, 9:20am UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/14 "2026-08-13T09:20:04Z")
The one linked to by @Gramps-Too is 1.6mm, that is thinner than 1.75mm filament. ---
**Author:** ![Gramps-Too](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/gramps-too/32/30364_2.png) [@Gramps-Too](https://forum.snapmaker.com/u/Gramps-Too)\ **Post date:** [August 13, 2026, 2:15pm UTC](https://forum.snapmaker.com/t/petg-not-extruding-at-all/42887/15 "2026-08-13T14:15:14Z")
If your tool is smaller than than your filament which is 1.75mm it will go through til it hits the end of the stuck filament. From there your pushing out the old filament with the tool.