How to fix heat creep in your 3d printer hotend

Fixing a Phaetus Dragonfly BMO hotend that has succumbed to heat creep.
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[@CodyThierauf]

your bmo shouldn't be getting heatcreep at all. it's not at all common on them which means you've got some other issues with your extruder design that you need to look into

[@lajoyalobos2009]

I did something similar. I removed the fan duct from the heatsink and let it heat up while periodically putting manual pressure on the extruder with filament. Eventually the filament started pushing through. I pushed it through and extruded for a bit before very quickly pulling the filament back up into the PTFE tube. I then reinstalled the fan duct and turned off the heat, letting the fan cool the heatsink again before using the hotend again.

[@johnallen4030]

Is the heat break recieving proper cooling from the fan?

[@ThisDesignedThat]

Yes, I couldn't see any issues with fan cooling

[@L3Dhelpguide]

This is so not a heat creep issue, nor a resolution to heat creep. Address the heat sink fan being dirty, or dying of poor mfg, with a ball bearing fan. And or ensure the fan has a good guide of air to be at the heat sink.

[@ThisDesignedThat]

Great tips thanks for sharing, those are some things I've definitely overlooked on my machines

[@justchill4886]

im not master but just guessing i think your barrel thing which does connect hot to cold areas together not thermally well to transfer hest to cold so it stays hot always. thrrmal paste and aluminum foil should fix ut. good luck

[@aaronramly1705]

Most people thinking when they got heat creep they thought the heat creeping into the heatsink . that is not actually the case. What really happened is the heat creeping into "filament" because like @justchill4886 said the heat break & heatsink is not thermally connected. the heat break is jammed with heat & it can't transfer the heat efficiently to the heatsink so it creep to the filament instead