My roof fan has been shutting down randomly with flashing green light and beeping. (I remove the fuse to get it to stop with the green light.). A while back when this happened there were some bugs stuck in there that stopped it from spinning freely. Cleaned those out, then it worked fine for a long time. I can't find any obstruction now. It will run well for a while, then just randomly shut down. It's happening with increasing frequency.
Anyone else have this problem? What did you do? Any advice appreciated.