all-Bran I had the same exact experience as you this past weekend and I also live in Michigan. I went to use the nozzles and nothing came out and no light was on so I figured it was low anyways, well it was close because I put in about 3/4 gallon before overflow but when I went to try it I had no luck still. I figure it was the extremly low temps we got here (~5 degrees) freezing up the nozzles or lines. I haven't needed to use it since but I'll check it later today, I'm waiting for warmer temps to hopefully unfreeze the lines.... Or the pump broke but I'm ignoring that possibility for now...