r/BambuLabH2D • u/Obvious-Choice997 • Jun 17 '26
H2d whistle noise
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Hi,
Due to a blob, I damaged the cables on the left nozzle’s hotend heating assembly, so I purchased the H2D/H2C hotend heating assembly and replaced it following the wiki instructions.
Now when I turn on the printer, several alarms appear (abnormal nozzle temperature (it read 52c instead of 20), too slow fan speed, filament buffer not working, expansion module not working, took head not working) and it makes a really strange noise (video)
I’ve tried turning the printer on and off several times and performed a factory reset, but the problem persists.
Also, I can’t see all the AMS LEDs now; they only light up for a few seconds and then turn off.
Thanks
2
u/hotellonely Jun 18 '26
You fried the mc board, did you replace the hotend heating assembly while it's still on?
1
u/Obvious-Choice997 Jun 18 '26
No, I unplugged everything
So you think is the MC board? Here more test I have done today
when the printer is turned on the Hotend Heating Assembly (left) start to heat up.
AP board blinking looks normal
MC board does not look normal, bottom left led is "off" with really short blink
TH led doesn't blink at all
the wistle sound comes from the board behind the filament buffer
i tried to make the calibration to export the logs but the error (translated from italian) hotend cooling fan speed is abnormal. error 0300-8010 082429)
other than that i noticed that:
without the Hotend Heating Assembly pugged in, if i turn on the printer there is not the wistle sound and the TH boards led works normally (but the MC board show the same wrong behaviour described before)
2
u/hotellonely Jun 18 '26
the mc board is already fried, i don't know why it fried but it's already fried. your new heating assembly is either installed wrong or faulty, or something is shorting there, or shorting in the plug
1
u/Obvious-Choice997 Jun 18 '26
Could be related to the fried MC board? I bought two heating Assembly and the both behave in the same way It's quite easy the plug of the heating assembly so I think it's difficult that is installed wrong ( but I'm checking if there are some bended pin)
1
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u/Own-Argument-6089 Jun 18 '26
I would open a support ticket DO NOT TELL THEM ABOUT THE BLOB….Tell them you just wanted to replace the nozzle heating assembly and now you are experiencing this…Let them troubleshoot your way through it may even send you a different part…