I set up my incubator (gopherbator plans), and am almost through my first hatch (putting the eggs in the hatcher tomorrow). My light has stopped turning off, and instead dims and buzzes. When it's on, it functions fine. I've tried a new lightbulb, which didn't make a difference, and I redid the wire connections to the light and the thermostat. It's still functioning, but getting on the hotter side (since the light won't turn all the way off), and the buzzing is obnoxious. Any ideas?