Fan on printhead running unsteady after print

Bambu Lab H2 Series
1

Basically, as the title says. For a couple of days (after installing the laser module - don’t know if connected) my H2C is behaving a bit oddly.

Whenever it is done with printing, the fan on the printhead is running (to cool down?). Honestly, I do not know if it has always done this. Now the rpm of the fan are constantly changing and alternating between 10 & 100% every second or so. This goes on for like 20min and then it is gradually getting more silent (but still audible and alternating).

Anybody else experiencing this?

2

Sounds like it could be poor electrical contact at the connection point for the enhanced part cooling fan cable on top of the toolhead.

Haven’t had this happen myself or heard of it before, though.

3

The fan on my H2C likes to run as well when not in use, but not at 100%. I put mine on an Alexa switch to turn it off. I know they have a tendency to go through fans.