they’re far too loud at idle IMO. and it would be good not to have to have to keep turning the printer on and off
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I am of the same opinion, the printer should not spin any fans when in “standby”.
However, I guess they leave the fans on because all stepper motors are enabled in standby, I guess they require quite some current and therefore the mainboard needs to be cooled. But this is just a guess.
Yes, a lower silent power state or standby would be much appreciated
odd, mine turns off after everything are cool down on its own - so far printed/testing PLA+, ABS and PETG. ABS does take the longest - and I actually turned on both the Part and Aux Fan to help it cool down faster - I did not open the door, which would help make it faster I supposed.
I printed with the door open for PLA+ (Duramic brand).
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Hello,
We are working on improving the power efficiency of the printer when idle on a future update of the firmware.
Until then, you might need to reboot the printer if you cancel a print, and notice that the enclosure fan is still running.
Thanks
Ciprian
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Dear @BrotherC ,
thanks a lot for the reply, it is good to hear that there will be some improvement in the future.
For me it is not the enclosure fan which keeps running, it is the fan on the other side, I guess it is the mainboard fan.
Thanks, Andreas.
If the MC Board fan is noisy, it might have problems and might need to be replaced.
To confirm this, I recommend opening a ticket to check with Customer Support and ensure there’s nothing wrong with it.
A video will help troubleshoot the issue further.
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Do I understand correctly: there should be no fan running after the printer cooled down?
This fan is not noisy, it is just running all the time. It is very quiet compared to the fans running during a print! 
The MC Board fan will be running even when idle.
But there’s a bug where the exhaust fan on the enclosure remains turned on in some situations, and the workaround is to restart the printer until a new firmware update fixes this.
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I’m running the X1 Carbon with all the updates, and as of todayy, January 12, 2023, the fan still does not turn off even 12 hours after the print has finished.
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In addition to fans, can we get the toolhead lights and AMS lights to shut off automatically in standby as well? They’re quite bright in a dark room.
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Until the firmware gets fixed, I’m using a smart plug to turn on/off the machine remotely. I’m using an Emporia, so it also tells second-by-second how much wattage the X1C is drawing. As you would expect, maximum power draw occurs when first heating up the build plate and hotend. For anyone curious: Maximum draw then is <400watts, and then it declines from there as the X1C continues heating up. You can use that info to size a UPS if you want to. Anyway, when the X1C has cooled down I turn it OFF, and I turn it ON when I start slicing so that it will be ready to receive the g-code.
By the way: even just turning on the machine and without any printing, the X1C is running some kind of fan. Why? Nothing is happening.
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Anything new on this topic? I just bought a new Carbon X1 and it is anoying when you are in the same room and the fan is still spinning even if you shut down the printer with the on/off button on top of the case. You always have to shut down the power on the back 
Yeah but I don’t get it - I push the off button and only the display goes dim. AMS still on, Light in the printer still on?! Is there anything in the pipeline that fixes thing with a new firmware - is there a github we can post or look at?
The only off button is on the back of the printer. There is a wiki for those buttons tho.
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From the Quick Start guide:
All that button does is turn on/off the screen. Which is pointless since you can just tap the screen to turn it on and it turns itself off.
Equally stupid is the Pause button symbol. Why not use a symbol that is universally recognized?
It’s a type of pause, it is a Cancel Print, Emergency stop.
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just for future reference for anybody else that comes looking for this issue… it appears that firmware 01.05.01.00 (20230426) has now fixed the issue
“7.[System] MC board fan is off until the tool head is moved. It will then turn on to cool the MC board components. When the print concludes and the printer goes to power save mode, the MC board fan will again turn off.”
Can confirm that the printer is now silent when not in operation.
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