I've heard of this before from this forum and now it has happened to me but I cant find the answer so I thought post and get responses. I start the cycle once every week or two and let it run for 20mins through the winter. I don't have a trickle charge -yeah I should get one. Anyways, yesterday when I went to start it I'm thinking my batt was low and now there is just this low hum like something is stuck (it had almost turned over and then I got this hum NOT like a click when there is a low batt) nothing else will happen just the hum. Is it a frozen starter? or something else...