Yes it could be the fan. Your object has a very thin surface directly above the raft and bed, this needs fan. You can test the fan by printing the object another time, this time with fan at 100 not auto.That way you should hear the fan always from the first layer of your object.

Good Afternoon

I would like to see a Spoiler Tag button at the top of the Text Formatting Bar preferably next to the

No, was just a picture to represent something of what it might look like , just an idea, doesnt even hav to look like that either, but if i can get the tools ill try my hand at making my own representation.