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Pla stuck on nozzle, heater block and fan shroud

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Heat up the nozzle to 180-200C and wipe the block and nozzle clean with a rag. You can use something like a flat head screw driver to scrape any stubborn plastic off. It doesn't have to be clinically clean. I've been meaning to buy a brass wire brush for stuff like this, but I never seem to remember to pick one up when I'm at a hardware store.

For the fan shroud. That's a bit of a pain in the arse. If you have a heat gun you can try using that to soften the plastic so that you can scrape it off. Just be careful that you don't over heat the fans while you're doing this. You can also try using a soldering iron if you have a tip for it that you don't care about.

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Try this before going 180C. Heat to 90C, and try to peel the whole thing off. Its MUCH cleaner if you can grab it as a whole skin. Same idea as the atomic pull it's solid enough to peel off, but not so liquidy that it'll stick onto your cloth and block.

I've done this many times, and it works well for cleaning the nozzle exterior as well. 90C is the magic temperature!

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one additional observation, the gap between the bottom of white teflon coupler and the stainless steel part (with holes round it) is too small it should be 1-2mm, this is adjusted by turning the stainless part with the heater at say 150 degrees - take care its quite fragile

Its not clear from the picture but it could be that filament is coming out between the bottom of the stainless bit and the brass print head block

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