I had a great number of problems with the Head fan previously. When it did not do its job I waited till it finished and went to clean that fan, It might scorch the wood more in some part but you would have finished work. To have the entire job destroyed because of a glitch is unacceptable as one can never start out on a job with expensive materials for fear that everything will turn to trash. I would certainly like to have a means of seeing how well the fan is doing but PLEASE let me choose if it can be shut down.
To make things worse. this is only the Third Thing done on a fresh for practical purposes new machine and not even dusty yet. I experimented using previous knowledge with a vacuum cleaner and indeed the fan is slightly sticky. As this is with the Glowforge shut down it is not about anything electronic being episodic but the fan only.
This should be something that can be fixed in Software to have whatever color or flashing note in the GFUI to warn that the fan is not operating up to snuff but even if it might destroy the work to keep going it would certainly destroy the work to stop in the middle.
For now, I have shut down again until this software glitch is fixed. I have not started in on anything to clean the fan that does not even show dust as yet though I could spray a bit of silicone spray to ease any tight spots or the hand cleaner I used to keep the old fan operational, though there is nothing to clean that is visible. As real dirt builds up I would hope to be able to clean it as I did before with the hand cleaner. As to move it outside to clean is an imposibility.