Picked up the latest incubator yesterday. Huge wooden one (about 5 feet high). It has been used for quail. There are no company names on it. Problem - pluggged it in, turned it on, and it won't stop heating. Changed one wafer, no difference. Have both wafers turned out as much as I can, and still heating. Any ideas on what is the problem? Are the parts for incubators fairly generic? Not sure where to start with this thing. Any ideas and questions would be really appreciated.