I hope the temp stays down for you. The eggs may not have gotten to 104. It depends on how long it was that hot.
Are you using a still air?
I'm hoping the eggs themselves were ok, as it couldn't have been that hot for too long. We returned briefly after some errands, I checked it, then we left again to meet SoManyHats by 3, then we departed for swim team. The heater kicks on at 6, and we get back at 8:30.
I am trying a still air this time. My last few hatches have been dismal -- 2 chicks each -- and I'm looking to switch things up and see if I can make a difference. They were great last year, so I'm working out what has gone wrong. Hubby hasn't been too keen in buying yet another incubator...especially since I want an expensive one, lol. But if this hatch fails, I'm building or buying a new one.