I installed my GQF 3255 Thermostat yesterday and I had troubles with the wiring because my hatcher was homemade ( not by me ) and the wires were not color coded. My old primary thermostat was a water heater thermostat and was crap for keeping temps, there were 5 to 8 degree swings so I ended up using my wafer as a primary. anyway back to the story. The new thermostat has a green wire, a white wire, and a black wire. I would think the white is hot, the black is ground, and the green is neutral ground but by the instructions the green goes to the pilot light which is a positive and the white would go to the wafer and the black was a ground. I hooked it up that way and it didnt work, so I tried hooking the green to the black and hooking them to the ground and it worked but it was taking forever ( like 4 hours ) to reach temps and that is not normal for the hatcher, then it would not get above 98.4 degrees max with the turn dial all the way up. I do not know how high they go but I know it has to be at least 99.5 my hatcher setup has a GQF fan, a GQF pilot light, a GQF coil heating element, a wafer backup, and then I installed this as a primary. Is there some way anyone can tell me how to wire this bypassing the wafer backup all together? Or if you have an idea of how to fix this issue I am open to suggestions, I have to put a bunch of eggs in the hatcher tomorrow and I may have to reinstall the dang water heater thermostat if I cant figure this out.