Was doing a little maint last night and one of my Koralias was making a little humming noise, which was odd as they are usually totally silent. So when I started messing with it a little it became obvious that it was spinning backward. I tried to unplug/replug a few times and it stayed the same, so I pulled it out, rinsed in the sink and tested and it started running fine again. Any thoughts what would cause this? Is it getting ready to die or is this just an oddity?
Thanks.
Thanks.