The Original Prusa i3 MK3 is the successor of the award-winning Original Prusa i3 MK2 3D printer.

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PSU clicks during bed heating up

I Just finished assembling the printer and cant seem to figure out why my PSU makes a clicking noise witch definitely sounds like a electrical noise only while the bed is heating up and at the same time my red led on the bed keeps flashing on and off during heating?

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Hi Chad,

while the bed is heated, the red LED flashes to inform the user.

EDITED

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When might we expect that update? I just got my i3 MK3 and it has this behavior...

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I finished my build today and updated to 3.2.1. Is this the "improved version." I also notice you said the update will "reduce" it. Not fix or eliminate it. Is there a different version of the PSU which does not have this problem?

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Hi James and Adam, it looks like some HW changes are needed to prevent the PSU clicking, I talked to the devs and they are still working on it. I edited my previous response.

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add another to your list. just finished my mk3 build and the sound is quite loud when the bed first heats up and then dissipates as it is printing, but still audible (and somewhat annoying).

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I also have the clicking bed/psu

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I just finished my build and have the same issue

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Chad will be eternally grateful.
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