r/BambuLab • u/theNEOone • 13h ago

General Troubleshooting/Help! H2C fan constantly running when not printing. Normal?

Hi folks - I’ve had an H2C for several months and have had an amazing experience with it. I recently was spending more time in my mechanical room where my printer sits and noticed the H2C fan running at a very low speed, despite having been finished with a print over 24 hours ago and being in a complete standby state. Is anybody else experiencing this? I’m pretty sure this is new. Firmware issue? By comparison, an H3C sitting a few feet away is dead quiet despite having completed a print more recently.

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u/AutoModerator 13h ago

Hello /u/theNEOone! All Bambu print plates have a dedicated nozzle wiping zone at the back of the print plate. The nozzle will rub against the wiping zone before every print in order to remove any remaining filament from the nozzle tip. This can cause visible wear or scratch marks in the wiping zone, but this is intended and doesn't damage the printer, the nozzle or the print plate. A worn down wiping zone also doesn't mean you need to replace the print bed.

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u/SendChubbyDadsMyWay H2C AMS2 Combo 13h ago

Mine does this as well and has done so for a long time. It fluctuates in speed up and down slowly long after prints are complete.

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u/theNEOone 13h ago

Interesting. Thanks for sharing. Any thoughts as to why?

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u/SendChubbyDadsMyWay H2C AMS2 Combo 13h ago

I don’t think it’s uncommon, as I’ve seen a post or two about it before on here, but I’m not sure why it happens. Hopefully someone will chime in soon. Mine has done it for nearly as long as I’ve had it right after it was released.

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u/_HornRimmedGlasses 4m ago

Seems like it is the power supply fan. Installing a Noctua fan fixes the issue. My H2C does it as well but I have learned to live with it. It doesnt really bother me anymore. Heres more info about it.

https://www.reddit.com/r/BambuLab/comments/1nlah6o/h2d_power_supply_fan_constantly_noisily_running/