Great!! Now you should never have to "mess" with the wafer thermostat----its a safety, But if the electronic one was to hang on---the wafer will not allow the temp to go over the "high" set, but you could in a emergenct turn the wafer in a little to lower the them to around 100 till you could get through the hatch or replace the electronic one. Get the hatcher plugged in and tested----You will like that. Get the humidity right----put some eggs in the incubator---make sure you write the date down-----I use a calender----I write SET on the calender the day I put them in------then the next day is 1, 2 the next, etc. "I" candle on day 18 for the final time and put them in the hatcher which has a higher humidity. Good Luck. Keep us informed!